Operating Manual MCON Nitromat - Polcasting Nitromat Operating Manual MESA Electronic GmbH ......

Operating Manual

MCON Nitromat

MCON Nitromat Operating Manual MESA Electronic GmbH

Manufacturer MESA Electronic GmbH

Leitenstraße 26

D-82538 Geretsried-Gelting

Telefon (0 81 71) 76 93-0

Telefax (0 81 71) 76 93-33

Your sales partner

About the contents This manual applies to the MCON Nitromat controller. It

documents the functioning and operation of the device

and the diagnosis of faults.

The guide is intended for all users (operators) and

operator of the MCON Nitromat. It must be accessible to

this group of people and be carefully reviewed before

using the device.

All rights to this documentation, especially the right of reproduction and distribution

and translation reserved by MESA Electronic GmbH, and for the event of copyright

applications. No part of the documentation may be reproduced or modified, copied

or distributed using electronic systems in any form without the express permission of

MESA Electronic GmbH. Subject to errors and technical modifications.

© MESA Electronic GmbH

MESA Electronic GmbH will not be liable for any errors in this documentation.

Liability for any direct or indirect damages caused in connection with the delivery or

use of this documentation is excluded insofar as this is legally permissible.


Nitromat 300 EN v1.0 12-2013

Page 3 of 96

Table of Contents

1. User information ........................................................................................................................ 6

1.1 General information ............................................................................................................ 6

1.2 Important safety notes and symbol description .............................................................. 6

1.4 Warranty conditions ............................................................................................................ 8

1.5 Packing and delivery .......................................................................................................... 8

1.6 Standards and regulations ................................................................................................. 8

1.7 Software release versions .................................................................................................. 8

2. Introduction ................................................................................................................................ 9

3. Technical description ............................................................................................................... 11

3.1 Hardware Description ........................................................................................................ 11

3.2. Installation ........................................................................................................................ 18

4. Operating principle .................................................................................................................. 20

5. Configuration procedure ........................................................................................................ 22

5.1 Device powering up .......................................................................................................... 22

6. Menu and display .................................................................................................................... 24

6.1 Screens .............................................................................................................................. 24

6.2 Inserting values ................................................................................................................. 25

6.3 Messages ........................................................................................................................... 26

6.4 Main menu .......................................................................................................................... 27

6.5 Normal View ....................................................................................................................... 29 6.5.1 Bargraph display ........................................................................................................ 31 6.5.2 Graph display ............................................................................................................. 32

6.6 System events ................................................................................................................... 33 6.6.1 Errors .......................................................................................................................... 35 6.6.2 Warnings ..................................................................................................................... 35 6.6.3 Alarms ......................................................................................................................... 36

6.7. Setpoints ........................................................................................................................... 36 6.7.1 Fixed Setpoints .......................................................................................................... 36 6.7.2 Programs .................................................................................................................... 37

7. Programs .................................................................................................................................. 38

7.1 Tracks config ..................................................................................................................... 41

7.2 Program segments ............................................................................................................ 42 7.2.1 Set segment tracks .................................................................................................... 44

8. Control ...................................................................................................................................... 45

8.1 Furnace temperature control .......................................................................................... 45

8.2 Kn control .......................................................................................................................... 49

9. Alarms ....................................................................................................................................... 51

9.1 Analog alarms .................................................................................................................... 51


Nitromat 300 EN v1.0 12-2013

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9.2 Digital alarm ....................................................................................................................... 55

10. Maintenance ........................................................................................................................... 57

10.1 Measurements ................................................................................................................. 57

10.2 I/O overview ..................................................................................................................... 58 10.2.1 Terminals .................................................................................................................. 58 10.2.2 Digital outputs .......................................................................................................... 58 10.2.3 Digital inputs ............................................................................................................ 59 10.2.4 Analog inputs ........................................................................................................... 60 10.2.5 Analog outputs ......................................................................................................... 60

10.3. Digital outputs assignment ........................................................................................... 61 10.3.1 Digital output assignment constraints .................................................................. 62

11. Analog inputs ......................................................................................................................... 64

11.1 Analog input 1 .................................................................................................................. 64

11.2 Analog input 2 .................................................................................................................. 64

11.3 Analog input 3 .................................................................................................................. 64

11.4 Analog input 4 .................................................................................................................. 64

11.5 Analog input 5 .................................................................................................................. 64

11.6 Analog inputs parameters .............................................................................................. 65

12. Nitriding .................................................................................................................................. 66

12.1 NH3 MFC type .................................................................................................................. 67

12.2 Nitrocarburizing............................................................................................................... 68

12.3 Nitriding settings ............................................................................................................. 68

12.4 Scaling Analog Out ......................................................................................................... 71 12.4.1 AOUT1- MFC NH3 ..................................................................................................... 71 12.4.2 AOUT2 and AOUT3 (MFC N2/CO2) ......................................................................... 72

13. Communication ..................................................................................................................... 73

13.1 Com1 and Com2 .............................................................................................................. 73

13.2 Ethernet communication ................................................................................................ 75

14. User privileges ....................................................................................................................... 77

14.1 Users management ......................................................................................................... 79

15. System settings ..................................................................................................................... 80

15.1 System informations ....................................................................................................... 80

15.2 System functions ............................................................................................................ 81 15.2.1 Touch screen calibration ........................................................................................ 81 15.2.2 Factory settings ....................................................................................................... 82 15.2.3 Parameters backup .................................................................................................. 82 15.2.4 Programs backup..................................................................................................... 82 15.2.5 Firmware update ...................................................................................................... 82

16. Logging ................................................................................................................................... 84

16.1 Logging channels............................................................................................................ 86

17. Control principle .................................................................................................................... 87


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17.1 PID control ....................................................................................................................... 87

17.2 Discrete control output ................................................................................................... 90

17.3 On/Off control .................................................................................................................. 91

17.4 Analog control ................................................................................................................. 92

18. Specifications ........................................................................................................................ 93

18.1 Isolation diagram............................................................................................................. 96


MCON Nitromat EN v1.0 04-2013

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1. User information

Please read carefully this instruction before operating the device. Here you

can find important information for adequate using regarding operators safety

and correct device working.

1.1 General information

For correct and safe operate device should be used according to the

instructions given by the producer. Correct operating also depends on proper

handling, storage, transport and maintains

Knowing of warning symbols is needed for proper handling of the device.

Among the other, these instructions are defining the area of device usage and

needed operator qualification.

Because of the limited size of the manual, there still are some details

concerning installation and usage of the device, which are not covered. Thus,

for additional explanation, customer should contact producer’s technical

support.

1.2 Important safety notes and symbol description

It is extremely important to know the meaning of symbols which are appearing

in the manual. Safety notes and warnings are intended to prevent operator

hazard situations and damage of the device or working environment.

Symbol explanations are given as follow:

DANGER!

Means directly life danger, seriously

body injuries and equipment damage.



Page 7 of 96

WARNING!

Means possible death danger, danger

of serious body injuries and equipment

damage.

CAUTION!

Means possible danger of slight body

Injuries and danger of serious device or

equipment damage.

CAUTION!

Means danger of serious device or

equipment damage.

NOTE

Refer to the important information on

which should pay attention.

Proper usage

Device should be used only in purposes which are described in this manual.

Information about the field and way of usage can be found in chapters 2.

Introduction, 3. Technical specification and 4. Operating principle.

Qualified operators

Only qualified personal should operate this device. Qualified personal are

persons which are familiar with installation, mounting and handling this

device. Also they should be trained for work with the devices and systems

concerning safety standards for electronic equipment, gases at high

pressures, aggressive and dangerous environment.



Page 8 of 96

Installation, connection to electrical power supply, connection to gas

installation, commissioning and maintenance must be done by qualified

operators.

1.4 Warranty conditions

Content of this manual is not a part of any agreement, commitment or

statutory right. All commitment on the producer’s part is contained in the

respective sales contract which also contains completely warranty conditions.

The warranty conditions are not changed with the content of this manual.

1.5 Packing and delivery

Content of the shipment is listed in the documents associated to the shipment,

according to the terms of contract. Please, after receiving, check if the

shipment is complete and undamaged.

1.6 Standards and regulations

Specification and production of this device are done according to the

harmonized European standards. Where European standards could not be

applied, the standards of Federal Republic of Germany were applied.

When using this device outside the area where these standards are applied,

the appropriate standards of the country of use should be observed.

1.7 Software release versions

Actual software version can be seen from menu, see Chapter 18.1 System

Informations. This user manual describes software version 1.00.



Page 9 of 96

2. Introduction Nitriding is thermo-chemical process for hardening the surface layer of steel

workpiece. Nitriding is applied in order to increase the resistance to wearing

and corrosion and to improve the dynamical hardness of steel parts. The

surface layer provides the resistance to wear and corrosion while the diffuse

layer located below, preserve hardness. Process temperature during nitriding

is between 480ºC and 580ºC while it last from 1 up to 100 hours. Interconnect

layers, made in gas nitriding process, are composed of intermetallic

connection of iron and nitrogen (ε- and γ'- iron nitrides) which, depending of

process duration, can achieve depth of 10...30 µm and can have high point of

hardness with low brittle characteristic. But molding of this layer can be

completely avoided. A diffusion zone can be found below which achieve up to

0.8mm in depth into material. Here the nitrogen is diffusing into internal iron

structure and with alloying component like Cr, Mo, Ti, Al, V creates special

nitrides. These special nitrides are very important for high hardness and wear

resistance of alloyed materials.

300 400 500 600 700 800

0.01

0.1

1

10

ε - Nitrid.

γ’ - Nitrid.

γ - Mix. crystal

α - Mixed crystal

Temperature (ºC)

Nit

rid

ing

nu

mb

er

- K

n

figure 1. The conditions for originating the specific phases of iron nitrides

Nitrocarburizing is thermo-chemical process for doping and hardening the

surface layer of workpiece. Carburizing is performed in gas atmosphere at

temperature between 500ºC and 630ºC in mixture of gases which can release

nitrogen (for example ammonia) or carbon (for example carbon dioxide). The



Page 10 of 96

aim is to increase the resistance to wearing and corrosion of low and medium

alloyed steels.

Dissolution of ammonia is performed in correlation with the following formula:

232

3]3[ HNHNH

The nitriding characteristic number is known as:

2

3

2

3

)(

)(

Hp

NHpK

N

In case of pure nitriding, the nitriding characteristic number can be calculated

from the degree of dissolution of ammonia i.e. from the quantity of hydrogen

in furnace.

The figure 1. shows the conditions for originating the specific phases of iron

nitrides versus nitriding characteristic number and temperature. This diagram

could be well implemented for low alloyed steels.

MCON Nitromat device controls both temperature and nitriding number Kn

and N2 flow as well. It is especially suitable for the nitriding and

nitrocarburizing processes. Process can be guided with steps which defines

Kn and temperature in the time domain. Process optionally starts with initial

gassing and/or pre oxidation phases and can be finished with the post

oxidation phase. Nitrocarbizing is also possible by controlling the CO2 gas

flow in the furnace.

MCON Nitromat offers advanced features such as logging, Kn and

temperature trend display, Ethernet, MODBUS and PROFIBUS connectivity,

USB parameters, user access levels and programs backup and firmware

update.



Page 11 of 96

3. Technical description

3.1 Hardware Description

MCON Nitromat device is packed in standard DIN ¼ package. Dimensions

are 118mm x 96mm x 96mm.

figure 2. MCON Nitromat controller

Front panel of the device contains TFT touch screen, USB port, status LED’s

and keys. On the rear side there are connections for analog inputs and

outputs, digital inputs and outputs, communications and power supply.



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1.8

1.6

1.4

1.2

1.81.8

1.0

0.8

0.6

0.4

0.2

0.0

Furnace control- Graph

WT=850ºC WC=850%T=828ºC C=850%

1100

1000

900

800

700

600

500

400

300

200

03:15:02 03:15:32

(1)(2)

(3)(4)

(5)

(6)

(7)

(8)

Nitromat 300

figure 3. MCON Nitromat front panel

1 – USB port

2 – Escape key

3 – Communication activity LED

4 – Key Down

5 – Alarm1 (dout1) status

6 – Key Up

7 – Alarm2 (dout2) status

8 – Enter Key

figure 4. MCON Nitromat back side



Page 13 of 96

On the next table are listed all terminal outputs signals:

TERNINAL # Signal Description

1 L Power Supply L 220V

Power Supply N 220V 2 N

3 REL2 NO

REL 2, 5A – DIGOUT2 4 REL2 COM

5 REL2NC

6 REL1 NO

REL 1, 5A – DIGOUT1 7 REL1_COM

8 REL1 NC

9 RXA

RS 485/422 isolated

10 RXB

11 TXB / RS485 B

12 TXA / RS485 A

13 GND_ISOLATED

14 GND

RS485 uninsulated 15 A

16 B

17 IN1+ AIN 1

(thermocouple – furnace temperature) 18 IN1-

19 IN2+ AIN 2

(4-20 mA – H2 sensor) 20 IN2-

21 IN3+ AIN 3

(4-20 mA – MFC N2) 22 IN3-

23 IN4V (not used) AIN 4

(4-20 mA – MFC NH3) 24 IN4N (IN4-)

25 IN4A (IN4+)

26 IN5V (not used) AIN 5

(4-20 mA – MFC CO2) 27 IN5N (IN5-)

28 IN5A (IN5+)

29 AOUT GND AOM MODULE1

(MFC NH3, MFC N2) 30 AOUT1 I



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31 AOUT1 U (not used)

32 AOUT2 I


34 AOUT GND

AOM MODULE2 (MFC CO2)

35 AOUT3 I


37 AOUT4 I (not used)


39 M3_1

MODULE 3 (REL1,REL2,REL3, DIGITAL INPUT)

40 M3_2

41 M3_3

42 M3_4

43 M3_5

44 M3_6

45 M4_1

MODULE 4 (REL1,REL2, DIGITAL INPUT)

MODULE

4,5 and 6

OC12

46 M4_2

47 M4_3

48 M4_4

49 M4_5

50 M5_1

MODULE 5 (REL1,REL2, DIGITAL INPUT)

51 M5_2

52 M5_3

53 M5_4

54 M5_5

55 M6_1

MODULE 6 (REL1,REL2,REL3, DIGITAL INPUT)

56 M6_2

57 M6_3

58 M6_4

59 M6_5

60 M6_6

MCON Nitromat is highly flexible with inputs and outputs and their number

depends on built in modules. There are several module types which can be



Page 15 of 96

ordered and installed on certain positions so user can customize I/O

peripherals according to custom requirements.

REL1 module – 4 relays, 3A 250V, 4NO (normally open) contacts and one

common (COM) contact.

Re

l1

Re

l2

Re

l3

Re

l4

Co

m

MODULE connection

Terminal connection

Rel1 Mn_1

Rel2 Mn_2

Rel3 Mn_3

Rel4 Mn_4

COM Mn_5

REL2 module – 2 relays, 5A 250V, 2NO and 1NC (normally closed) contacts

and 2 COM contacts.

Re

l1

Re

l2

MODULE connection

Terminal connection

Rel1 Mn_1

Rel1 Mn_2

Rel2 Mn_3

Rel2 Mn_4

Rel2 COM Mn_5

REL3 module – 3 relays, 3A 250V, 3 NO and 3 COM contacts.

Re

l1

Re

l2

Re

l3

MODULE connection

Terminal connection

Rel1 Mn_1

Rel1 Mn_2

Rel2 Mn_3

Rel2 Mn_4

Rel3 Mn_5

Rel3 Mn_6



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DIGIN module – 4 isolated digital inputs with common ground

Din

p1

Din

p2

Din

p3

Din

p4

gn

d

MODULE connection

Terminal connection

Dinp1 Mn_1

Dinp2 Mn_2

Dinp3 Mn_3

Dinp4 Mn_4

gnd Mn_5

AOM module - Two independent isolated analog outputs with 10V voltage

and 20mA current output in parallel.

I- c

h1

U-c

h1

I- c

h2

U-c

h2

gn

d

I

I

ch1 ch2

MODULE connection

Terminal connection

I-ch1 Mn_1

U-ch1 Mn_2

I-ch2 Mn_3

U-ch2 Mn_4

gnd Mn_5

OC12 module – 12 open collector outputs for connecting with relay box RL45

or external relays.

MODULE connection

Terminal connection

OUT1 29/45

OUT2 30/46

OUT3 31/47

OUT4 32/48

OUT5 33/49

OUT6 34/50

OUT7 35/51

OUT8 36/52

OUT9 37/53



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OUT10 38/54

OUT11 39/55

OUT12 40/56

not connected 41/57

not connected 42/58

+24V 43/59

GND 44/60

MCON Nitromat is a plug&play device which means that it scans all module

positions during starting and discover which modules are installed. Depending

on installed modules, all I/O ‘s are automatically numbered. Details can be

viewed in the Main Menu→Maintenance→I/O review→Terminals.

Digital outputs 1 and 2 (DOUT1 and DOUT2) are fixed on the ROW1. Their

status is shown on the front panel LED’s A1 and A2. Additional digital outputs

are provided by installed modules and automatically numbered from DOUT3

up to DOUT26. (If all 6 modules are filled with REL1 module type)

AIN1 is used to measure furnace temperature via appropriate thermocouple,

AIN2 measures H2 level and AIN3, 4 and 5 measure gas flow of N2, NH3 and

CO2 respectively. Analog inputs assignment is displayed in the Main Menu→

Maintenance→I/O review→Analog inputs screen.

There are 4 pre-installed analog outputs used for controlling mass flow

controllers (MFC). AOUT1, AOUT2 and AOUT3 are for HN3, N2 and CO2

MFC respectively, while AOUT4 is not in function.

Analog outputs functions are displayed in the Main

Menu→Maintenance→I/O review→Analog outputs screen.



Page 18 of 96

3.2. Installation

Before use the device it must be installed in dry environment with ambient

temperature up to 70 ºC.

Put out the terminals from the back panel and connect the wires.

On ROW1 connect wires for the power supply, DOUT1 (A1) and 2 and

communication.

On ROW2 terminal connect sensors for measurement according to the next

rules:

Analog inputs connections: - on the AIN1 position , connect Thermocouple (B,C,E,J,K,L,M,N,R , S or

T type)

- on the AIN2 position, connect output from NT46 device to measure

H2%

- on the AIN3 position connect output from N2 MFC

- on the AIN4 position connect output from NH3 MFC

- on the AIN5 position connect output from CO2 MFC

Analog outputs connections:

- Connect AOUT1 to the MFC NH3 input (if analog control output is

used)

- Connect AOUT2 to the MFC N2 input

- Connect AOUT3 to the MFC CO2 input

NOTE

AIN5 and AOUT3 are used only if nirocarburizing is required.

For pure nitriding they are not important.

NOTE

When pulse control is used, there is no need to connect analog

output because instead MFC, a valve on/off time is used to

control the flow.



Page 19 of 96

NITROMAT 300

MFC NH3

(4-20 mA)

out in

MFC N2

(4-20 mA)

out in

MFC CO2

(4-20 mA)

out in

AIN4 AOUT1 AIN3 AOUT2 AIN5 AOUT3

NT46

(4-20 mA)

AIN2

H2 probe

AIN1

Thermocouple

figure 5. Connecting mass flow controllers, H2 sensor and thermocouple

Digital outputs connections:

- One digital output is used for the small/great NH3 MFC valve. High

state means that great NH3 MFC is used.

- One digital output is for the nitrocarburizing track.

- One digital output for oxidating track

- One digital output for purging track

- One digital output for initial gassing track

- Up to 16 digital outputs are used as control tracks for program.

- Up to 3 digital outputs to for valve control (when MFC not used)

- One or two digital outputs for temperature control (heating and cooling)

- Up to 4 digital outputs can be assigned to alarms

Digital inputs connections

- DIGIN1 TO DIGIN4 for program starting or alarm disabling

(for details go to chapters “Alarms” and “Programs”)(



Page 20 of 96

4. Operating principle

Nitromat measures H2 level in furnace and calculate characteristic

nitriding number Kn. Depending on the difference between measured Kn and

desired Kn (setpoint), NH3 flow is increased or decreased which directly

affects dissolution of ammonia and thus H2 level into furnace and Kn. In

addition, device also controls the temperature in the furnace with heating or

heating/cooling outputs. N2 and CO2 flows are setpoints which are used to

drive mass flow controllers while NH3 flow is controlled with PID control

algorithm in which process value is Kn and manipulation value is scaled to

NH3 flow.

Every nitrocarburizing or pure nitriding process starts with heating up

the furnace atmosphere up to desirable temperature. Below this temperature,

no gas flow is allowed. Heating phase can be used also for oxidation or

purging furnace atmosphere before inserting ammonia. These features are

available only for program control. After heating, furnace is loaded with certain

amount of ammonia and N2/CO2 (approximately 5 x furnace volume) in the

initial gassing phase. When furnace if loaded, device starts to control Kn,

temperature and N2/CO2 flow guided by program or fixed setpoint.

NH3 flow can be controlled with small, great or both MFC. Big mass

flow controller is used in the initial gassing phase because of large volume of

NH3 which needs to be inserted into furnace. Also, if both MFC are used, big

one is active during Kn control, when required flow overreaches small MFC

range. Small MFC is used for accuracy of small NH3 flows. When big MFC is

used, appropriate digital output is active.

N2 and CO2 flows can be controlled with fixed values or as percents of

NH3 flow. For nitrocarburizing CO2 flow must be controlled. There is a digital

output (track) which is active when device is in nitrocarburizing phase. Also

this track can be set in desired program steps to enable nitrocarburizing.

When nitrocarburizing is not allowed, CO2 flow is zero.

Process control can be guided with programs or fixed setpoints. Program

contains furnace temperature and Kn setpoints which are changed in time

domain and N2/CO2 flow for that program. Also, program defines steps which



Page 21 of 96

performs oxidation or purging. For this purpose is used program tracks which

user can set.

MCON Nitromat has 2 control loops used to control temperature, and Kn. For

both loops there are separate control parameters which are organized in

presets. Every loop has 3 presets which hold PID parameters and user can

chose which one is active. N2 and CO2 flows are controlled directly via MFC.

During the measurement/control, device also checks all alarms and activates

associated digital output if the alarm is activated.

Also user can start logging of the measured data and stop the logging

automatically or manually and transfer file with logged data to USB stick.

Depending of the communication configurations MCON Nitromat can send the

measured data and statuses via MODBUS or PROFIBUS and also can obtain

parameters and commands.



Page 22 of 96

5. Configuration procedure

Before use the device it must be configured according to your specific needs. Follow the next diagram in order to set up the controller:

figure 6. MCON Nitromat workflow diagram

5.1 Device powering up

To start up the device, plug the power supply connector (ROW1, terminals 1

and 2). After power is plugged, device starts initialization routine and the init

screen is displayed. Initialization routine loads parameters, check installed I/O

modules and installs file system for logging and USB file transfer).

First all parameters are loaded and if there are errors when reading parameter

or inappropriate value, “ERROR” mark is displayed.

Second initialization step scans installed I/O modules to configure I/O

subsystem of device. If there is errors during this step please contact the

service.



Page 23 of 96

After successfully starting process, device enters to the main menu screen.

First time starting may require touch screen calibration. This is a step before

initialization where user must calibrate touch screen to make sure that device

will operate properly. Calibration is activated immediately after powering the

device up and it contains 3 points on the screen which user must press

precisely to achieve best accuracy. After last point press, device runs the

initialization routine and startup screen is displayed.

Touch the cross by stylus.

figure 7. Touch screen calibration

NOTE

Touch screen calibration can be done also in the

Settings→System menu.



Page 24 of 96

6. Menu and display

6.1 Screens

User has 2 options to interact with the device. One is touch screen where user

can directly press desired buttons and second is 4 key keypad.

Keyboard keys (DOWN) and (UP) are used to change a focus among

the screen buttons. Key (ESC) returns to the previous screen and key

(ENTER) press the focused button

Focused button has green color instead of blue color of unfocused button.

Focused and nonfocused buttons : Button Button

All screens in the MCON Nitromat menus consist of several elements:

(1) Exit/return button returning to the previous screen or menu

(2) Button – pressing this button to activate some action or enter to

menu/screen

(3) Input button– pressing this button to open the keyboard screen for

entering parameter value

(4) Checkbox button– check/uncheck an option

(5) Next button – goes to the next page of the screen/menu

(6) Titlebar – shows the name of the current menu/screen

Caption

Button

Input value

Checkbox

(5)

(6)

(1)

(2)

(3)

(4)

Nitromat 300

figure 8. Basic screen elements



Page 25 of 96

6.2 Inserting values

Parameter values are inserted in the keyboard screen which is displayed after

pressing the input button. Parameter can be numeric value, text, selection or

date/time values.

For the numeric values on the screen are shown minimum (MIN) and

maximum allowed (MAX) value for the parameter, parameter unit and

parameter default value.

ESC - escape from keyboard with no changing the value

ENT - confirm entered value and exit

<- - delete letter or number

Default - enter default value for parameter and exit from the keyboard screen

1 2

54

3

6

8 97

ENT 0ESC<- . -

Default

Parameter name value

Unit: ºC

MIN: 500

MAX: 950

800

abc

jklghi

def

mno

tuv wxyzpqrs

ENT _ESC<- ABC

Parameter name value

figure 9. Keyboard screen

There are parameters with predefined values which are set by choosing one

value from a list. After selecting desired parameter value, to confirm press ü

button, or button cancel selection.

Parameter name

Option 1

ü

Option 2

Option 3 Option 4

Option 5 Option 6

Option 7 Option 8

Option 9 Option 10

figure 10. Options screen



Page 26 of 96

Date and time values are inserted on the separate screen where the +

button increase and - button decrease hours, minutes, days months or

years.

+ ENT

ESC-

12 00

201231 12 //

:

+

-

+ + +

- - -

figure 11. Date and time inserting screen

6.3 Messages

Messages are screens which are shown when some certain events occur.

There are several types of messages and their meaning is described below

OK

ERROR!

Error message

Error message - displays message when error

event occurred or inserted value is out of range

NO

CONFIRM!

Are You sure ?

YES

Confirm message - confirms actions such as factory

reset, loading or saving parameters or programs

etc.

Press No to return to the previous screen or YES to

confirm action

OK

INFORMATION!

Info message

Information message - shows events which are not

critical for the system



Page 27 of 96

OK

WARNING!

Warning message

Warning message - shows warning immediately

after warning condition is met. Warnings can be

visible in Warnings screen.

PROGRESS!

Progress message - shows the progress of the

actions which requires some finite time to be

finished

6.4 Main menu

Main menu is root of the menu structure where user can navigate to all

features and parameters. After device powering up, on the screen will be

displayed Normal View screen. Exit from Normal View screen will display

Main menu.

Main menu

Normal View Settings

Maintenance

Logging

Programs

Setpoints

figure 10. MCON Nitromat Main menu

To choose (enter) the menus from Main menu screen, just press desired

button or navigate focus with and keys and press to enter into

focused menu.

On the diagram below is shown menu structure of the MCON Nitromat. Exit

from one menu (or screen) returns the previous menu.



Page 28 of 96

figure 11. Menus structure

In the Normal View screen are displayed all measurements and control data

for the nitriding process.

Settings menu contains all configurations and parameters which are divided

into several submenus. See the “Settings” chapter for detailed description of

parameters and settings.

Temperature, Kn, N2 and CO2 control parameters are available from the

Control menu which is detailed described in the “Control” section.

In the Maintenance menu user can view in details informations about

measurements and inputs and outputs. Detailed description about this feature

can be found in the “Maintenance” section.

1: Normal View

2: Settings

2: System

4: Nitriding settings

3: Maintenance

5: Logging

6: Setpoints

1: Temperature control

2: Kn level control

4: Programs

1: Measurements

1: Setpoints

1: Control fsettings

3: Alarms

Main Menu

5: Analog inputs

7: Config tracks

2: I/O review

6: Comm. config

2:COM2

3:Ethernet

1:COM1

2:Digital outputs

3:Digital inputs

1:Terminals

5:Analog outputs

6:Test relays

4:Analog inputs



Page 29 of 96

Programs menu allows managing programs. This menu is also available from

the Setpoints screen. Programs menus and feature are described in the

“Programs” section.

Logging screen shows all informations and configurations for the logging

feature. Detailed description can be found in the “Logging” section.

6.5 Normal View

Normal View is accessible from the Main menu→Normal view.

Normal view screen shows all important measurement and control data. It

contains several pages which are listed by pressing navigation button .

On the first page are displayed temperature (WT) and Kn (WKn) setpoints

,measured (process value) temperature and Kn and measured (XNH3) and

required (YNH3) amonia flow. If program runs, also is displayed segment time

and while program name and current segment is displayed in title.

If gas valve opening temperature is not reached or initial gasing is in progress,

instead WKn is displayed message

Measurements on this page are displayed with big numbers so they can be

viewed from the distance.

- pressing this button returns to the previous screen

- press this button to go to the next page

Nitriding control

WT = 500 ºC

WKn = 8.0

470 ºC

7.2 Kn

YNH3 = 2.3 m3/h

XNH3 = 1.8 m3/h

Setpoints

Program name - seg: 03

WT = 480 ºC

Init gasing 5m3

490 ºC

4.1 Kn

YNH3 = 10.0 m3/h

XNH3 = 0.55 m3/h

Segments

seg. time00:02/00:30

figure 12. Normal view - first page (fixed setpoint and program run display)



Page 30 of 96

On the Normal view screen user can insert setpoint values directly by

pressing screen on the place where the WT or WKn value is displayed. This

way user doesn’t need to go to the setpoints menu in order to change setpoint

value. This option is only available when no program or production run and

the current user privilege is greater or equal the required.

On the second page of Normal View screen are shown detailed informations

about nitriding process.

Nitriding control

WT = 800 ºC WKn = 5.0

T = 795 ºC Kn = 4.7 YT = 18% Y = 22%

Setpoints

YNH3 = 0.0 m3/h

WN2 = 0.0 m3/h

WCO2 = 0.0 m3/h

XH2 = 0.0 m3/h

XNH3 = 0.0 m3/h

XN2 = 0.0 m3/h

XCO2 = 0.0 m3/h

Sgas = 0.0 m3

figure 13. Normal view - second page in stop mode

On second page are displayed next data:

WT- temperature setpoint

WKn – Kn setpoint if Kn control phase is active. If not, “Heating up”, “Init

gassing”, “Purging” or “Oxidating” is blinking.

YT- control output for temperature control

Y – control output for Kn control used to drive NH3 MFC or valve (analog or

digital output)

YNH3 – Y control output scaled to required NH3 flow

XNH3 – measured NH3 flow if MFC used. For “Pulse control” type XX is

always displayed

WN2 – required N2 flow

XN2 – measured N2 flow

WCO2 – required CO2 flow, if nitrocarburizing is not allowed, this value is

always zero and displayed in gray color.

XCO2 – measured CO2 flow

XN2 - measured H2 concentration in furnace atmosphere



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Sgas – total amount of gas inserted into furnace from the beginning of the

process or time to end initial gassing (if no NH3 MFC presented when NH3

controll parameter is set to “Pulse control”). After initial gassing ends,

“finished” is shown.

Nitriding status – Actual state of process (Heating up, Initial gassing, Kn

control)

Setpoints button access menu with setpoints and programs to choose/edit. If

program runs, on this position is displayed Segments button which enters to

the screen with segments of program which runs.

Prog. 1 - seg:01

WT = 500 ºC Wkn = 0.0

T = 455 ºC Kn = 0.7 YT = 18% Y = 0.0%

Segments

YNH3 = 0.0 m3/hWN2 = 0.0 m3/h

WCO2 = 0.0 m3/h

XH2 = 0.0 m3/h

XNH3 = 0.0 m3/hXN2 = 0.0 m3/h

XCO2 = 0.0 m3/h

Sgas = 0.0 m3

tracks: A B C D E F G H I J K L M N O P

0 1 0 0 0 0 0 0 0 0 1 0 1 0 0 0

Prog. 1 - seg: 02

seg. time: 00:03/00:30 time : 00 24

figure 14. Normal view- third page (if program runs)

When program runs on the screen are shown program which is active, current

segment and segment elapsed/duration time and total time elapsed from

starting the program and track statuses. If heating, oxidating, purging or Initial

gasing is active, instead of WKn is shown phase which is active.

6.5.1 Bargraph display

To enter to bargraph screen, press button to switch to the next page from

the Normal View. Bargraph screen displays Kn level and temperature control

values in bargraph form.

Nitriding control

0 ºC

8.4

795 ºC

1800 ºC

0.00 50.00

SP

SP



Page 32 of 96

figure 15. Bargraph display

6.5.2 Graph display

Nitriding process can be shown in graph which displays a trend of changing

temperature and Kn level in time domain

Furnace control-Graph

200

300

400

500

600

700

800

900

1000

1100

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

WT = 500ºC Wkn = 5.0

T = 483 ºC Kn = 6.1

12:00:00 12:01:00

50.01200

Press to setmin and max

Press to setmin and max

Press to showbuttons

figure 16. Graph display

On the graph screen are plotted trend for Kn level and furnace temperature.

Graph feature has a history capability which allows viewing trend from the

starting of the control (transition from STOP to RUN mode).

On the graph screen is displayed trend in realtime. Additional trend options

and settings are available after pressing graph area when the button bar

appears below the graph. Tap on the screen several times to change buttons

which will be displayed or to hide button bar. When the button bar is

displayed, setpoints and current trend values are not displayed.

Pressing edges of screen, where are displayed temperature and Kn labels,

opens menu where can be set minimum and maximum for each trend display.

First group of buttons is for navigation through trend history. Press > or

< button to show trend data from one screen time backward or forward

respectively.

After pressing again graph area, another buttons appears. Press << button

to show trend data from the beginning of process or press >> button to show

realtime trend.

Next pressing on the graph area shows buttons for zoom in and zoom out

( Zoom+ and Zoom- Pressing these buttons will change screen time and redraw

trend points with longer or shorted screen time.



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Every graph sample point is stored to device internal memory. After switching

from STOP to RUN mode, device start to storing graph points to the internal

memory. Values are sampled on every sample time interval and trend is

showed within a selected screen time.

Sample time and screen time are parameters which are available after

pressing Settings button in the button bar bellow the graph.

Parameter: Graph sample time

Values : (2S, 5S, 10S, 20S)

Default: 2S

Description: Time interval on which one sample value (Kn level and

temperature) is stored to internal memory and plotted on the screen.

Parameter: Graph screen time

Values : (60S, 2min, 5min, 10min, 30min, 1h, 2h …)

Default: 60S

Description: Defines the duration of trend showed in one graph window.

Pressing Zoom+ / Zoom- buttons decrease/increase screen time respectively.

If screen time is 2h or greater, after pressing Zoom- screen time will be doubled

until whole trend can suit in one graph window.

6.6 System events

System events are errors, warnings and alarms. They occur under certain

circumstances and their status is displayed on the separate screen which is

accessible from the Normal View.

When event occurs in the Normal View screen is displayed flashing icon

which informs user that there is error, warning or alarm.

On the picture below are shown event icons from alarm, error and warning.



Page 34 of 96

Furnace control

Furnace control

Furnace control

Furnace control

figure 17. Event buttons showing

Detailed informations about occurred event are displayed by pressing event

icon or .

Errors

Amb. temp. error

AIN3 error

Invalid value

Overflow

Kn

Warnings

Gas release is blocked !

figure 18. Errors and warnings screens

Alarms

Furnace temp. Upper limit

Alarm1

Amb. temp. Upper limit

Alarm4

figure 19. Alarms screen

Errors, warnings and alarms are displayed on the same screen. Switching

from one to another is performed with button. If there are no any alarms,

errors or warnings, on the page for that type of event will be shown

information that there are no events occurred.

On the alarm page user can explicitly turn off alarm by pressing X button for

the certain alarm but only if alarm duration is zero (see Alarms section).



Page 35 of 96

6.6.1 Errors

Errors are critical event which occurs on some system failure invalid

measurement values or communication errors. On the errors screen are

displayed name of error and detailed description of error (optionally).

ERROR DESCRIPTION

EEPROM error Memory for storing parameters or calibration data

is corrupted.

Amb. temp. error Device ambient temperature cannot be measured

properly. Contact the supplier for details.

AIN error Analog input overflow or underflow.

Invalid value Kn cannot be measured and calculated correctly.

Modbus error Modbus communication has errors.

Ethernet error Ethernet communication cannot be established.

File system error USB or internal memory for storing log or graph

data cannot be initialized properly.

Time error Time and date is not set

6.6.2 Warnings

Warnings are less critical than errors and they don’t affect the device proper

functioning. On the next table are shown all warnings which can be occur in

the device.

WARNING DESCRIPTION

Device is in STOP mode Informs user that device is in STOP mode

Missing calibration! Analog input or analog output is not calibrated

which can decrease measurement accuracy.

Missing remote value! Remote setpoint is not received from the

MODBUS communication.

Gas release is blocked! Furnace temperature is below 500 ºC which



Page 36 of 96

forbid gas valve opening.

Stop from external! Program or control is stopped from digital input.

6.6.3 Alarms

On the alarm page are displayed activated alarms. For every activated alarm

is displayed detailed description what caused an alarm to be activated. For

details see the “Alarms” sections.

6.7. Setpoints

MCON Nitromat device has 2 control loops. First control loop is used to

control furnace temperature and second is for Kn control.

User can define loop set points in several ways:

- Fixed setpoints SP1 to SP4 are user explicitly defined setopoints

inserted via onscreen keyboard.

- Programs – defines temperature and Kn setpoints trend in time

(segments).

6.7.1 Fixed Setpoints

User can insert temperature and Kn level setpoint and their high and low

tolerances. When user select one of 4 fixed setpoints (in the setpoint menu),

controller starts the regulation with the setpoint values which are defined by

that setpoint.

There are 4 fixed setpoints which user can select. Every fixed setpoint has

next parameters:

-Temperature SP (from 200 to 1000 ºC)

-Kn SP (0 to 50)

- Temp SP+ and Temp SP- are upper and lower tolerances for

temperature

-Kn SP+ and Kn SP- are upper and lower tolerances for Kn.



Page 37 of 96

-NH3 range (Small/Big/Both) – allows using small or big NH3 MFC.

When set to Both switching between small and big will be automatically

performed depending of required NH3 flow.

- N2/CO2 in %NH3 – if enabled, N2 and CO2 are expressed as

percentage of measured NH3 flow.

- N2 flow – required N2 flow in m3/h or percents of NH3 flow

- CO2 flow – required CO2 flow in m3/h or percents of NH3 flow

- Kn offset – Kn value correction which is added to measured Kn

- Nitrocarburizing – allows nitrocarburizing (CO2 gas flow). If disabled,

CO2 flow field will be disabled also

Setpoints

SP1

SP2

SP3

SP4

Program

520ºC

550ºC

520ºC

550ºC

5.0 Kn

8.0 Kn

6.5 Kn

5.0 Kn

Program 01

figure 20. Setpoints screen

6.7.2 Programs

User can select in setpoint menu Program item which starts running the

selected program. Also user can press Program button to select one of the

program which will be run or edit program’s segments and common data.

User can choose which program to run by pressing the Programs button. After

that a program menu is open which allows selecting current program number,

edit common data and program segments.

Selected program is displayed near on the Setpoints menu. User can start

actual program by selecting program item on the Setpoints menu.



Page 38 of 96

7. Programs

Programs can be configured in Main menu→Programs or Main

menu→Normal view→Setpoints→Program menu.

Program is set of segments which are executed sequentially. Every segment

defines temperature and Kn setpoint and time required for those setpoints to

be approached. MCON Nitromat can store up to 99 programs. Every program

can be custom named and has its own number (from 1 to 99).

Every segment can activate some digital outputs when the segment is about

to run. This feature is called “program tracking”. There are 16 tracks, named

from A to P. Every track is associated with a digital output which it activates.

User can define tracks which will be activated or deactivated for every

segment.

100

200

0

300

400

500

600

700

800

900

1000

0.5

1.0

0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

1 2 53 4 6 7

T (ºC) Kn

Furnace temperature

Kn

8

segment 1 2 3 4 5 6 7 8

Temperature

setpoint 400 ºC 450 ºC 500 ºC 570 ºC 600 ºC 600 ºC 480 ºC 0

Kn 0 0 0 1.5 1.5 2.0 5.0 0

segment

duration

30 min 45 min 10 min 50 min 8 min 25 min 50 min 20 min

figure 21.Example of program segments

Segment setpoint is target value which must be achieved on the end of

segment. If segment duration is short, then device tries to achieve setpoint as



Page 39 of 96

quick as possible. If segment time is too long, device will goes smoothly to the

target setpoint. Therefore there is no need to define rising times because it is

automatically calculated depending of the previous and current segment

setpoint value and the segment time.

For example: segment 3 has temperature setpoint SPT = 500 ºC, previous

segment 2 ends on 400 ºC,

Because segment time is 10 minutes, device will regulate temperature from

400 ºC to 500 ºC with raising value: (500 ºC - 400 ºC)/10min = 10 ºC/min. It is

assumed that the 500 ºC temperature will be reached at the end of segment.

When there is no need to have constant process value over the certain time, it

is required to define segment which has the same setpoint as previous

segment (dwell).

Every segment defines both temperature and Kn setpoints while N2 and CO2

flows are constant during whole program except CO2 which is active only on

certain segmens. To allow CO2 flow, nitrocarburizing must be enabled and

segment with appropriate track set must run. Nitrocarburizing track can be

configured in Nitromat settings.

Also segment can be defined as oxidating or purging.

Program parameters:

Parameter: Program no

Values: (1 - 99)

Default: 1

Description: Select number of program which has to be edited or started. User

must first choose program number before editing/viewing program parameters

or segments.

Parameter: Program name

Values: (text up to 15 characters)

Default: not set

Description: Program name for which describes program purpose.



Page 40 of 96

Parameters: Temp SP+/Temp SP-/Kn SP+/Kn SP- are the same as

parameters for the setpoints. Refer to the “Setpoints chapter”

Setpoints tolerances for the program execution are used only to define when

the control is achieved setpoint value in order to go to the next segment (only

if the X bit is set). These parameters are parts of a program.

Parameter: HN3 range

Values : (Small, Big, Both)

Default: Small

Description: Type of NH3 mass flow controller to be used for that program.

Parameter: N2/CO2 in %NH3

Values: (NO, YES)

Default: NO

Description: Determines if N2 and CO2 flow will be defined as percents of

NH3 flow. For example If this parameter set to YES and N2 is 10% and CO2

is 5%, when XNH3 is 10 m3/h, N2 flow will be 1 m3/h and CO2 0.5 m3/h.

Parameter: N2 flow

Values: (0 – 100 m3/h or 0-50%)

Default: 0 m3/h

Description: N2 gas flow setpoint

Parameter: CO2 flow

Values: (0 – 130 m3/h or 0-50%)

Default: 0 m3/h

Description: CO2 gas flow setpoint

Parameter: Kn offset

Values: (-9.9 , 9.9)

Default: 0

Description: Correction of Kn

Parameter: Nitrocarburizing



Page 41 of 96

Values: (NO, YES)

Default: NO

Description: Allows CO2 flow. When NO, CO2 flow is zero and when YES

CO2 flow is controlled according to the CO2 flow parameter but only in

segments with appropriate track set.

7.1 Tracks config

Every track can be set to activate desired digital output. Tracks configuration

is available on: Main menu→Programs→Config tracks menu or from Main

menu→Settings→Config tracks menu.

Parameter : Track A, Track B, Track C … Track P

Values: (not set, dout 1, dout 2, dout 3 … dout n)

Default: not set

Description: Digital output which is associated to track. If not set, track will not

activate any digital output. Tracks configuration is common for all programs.



Page 42 of 96

7.2 Program segments

Program segments can be edited under segments screen which is available

in: Main menu→Programs→Segments screen. Before editing or viewing

segments, user must choose desired program.

Program 1 seg. 1-6

1

2

3

4

5

6

duration T Kn/tech X bit

00:30

00:45

00:10

00:50

00:08

00:25

400ºC

450ºC

500ºC

570ºC

600ºC

600ºC

0.0

Oxidating

Purging

1.5

1.5

2.0

0

0

0

0

0

0

Program 1 seg. 7- 12

7

8

9

10

11

12

duration T Kn/tech X bit

00:50

00:20

00:00

00:00

00:00

00:00

480ºC

0ºC

0ºC

0ºC

0ºC

0ºC

5.0

Purging

0.0

0.0

0.0

0.0

0

0

0

0

0

0

figure 22. Program segments displaying

Segments screen shows 6 segments by one screen. Press button to show

next 6 segments or button to show previous 6 segments. On the first page

there are basic data for every segment: time of segment (duration),

temperature setpoint (T), Kn value and X bit. To change segment values,

press appropriate segment button which opens segment editing menu. If

segment is purging or oxidating type, instead Kn value (which is zero in these

cases) is displayed “Oxidating” or “Purging”. For nitrocarburizing segments,

besides Kn value is displayed “CO2” (for ex. “4.2 + CO2”).

In the Edit segment menu there are temperature and Kn setpoint parameters

which have the same meaning and values range as fixed setpoints in Setpoint

menu.



Page 43 of 96

If segment technology is “Kn control”, Kn setpoint can be >0 only if segment

temperature is set to be higher than gas release temperature. First segment

which have Kn>0 is used for initial gasing which means that Kn regulation for

this segment will not start before initial gas volume enters into the furnace.

First segment of every program has Kn setpoint set to zero regardless of

segment tech.

Segment parameters are:

Parameter : Segment time

Values: (0 – 199 min)

Default: 30 min

Description: Segment time in minutes.

Parameter: X bit

Values: (checked, unchecked)

Default: unchecked

Description: When the X bit is checked (value “1”), this segment waits to

reach process values according to setpoints and their tolerances before

switching to the next step even the segment time elapses.

Parameter: Technology

Values: (Kn control, Nitrocarburizing, Oxidating, Purging)

Default: Kn control

Description: Defines step technology and automatically sets appropriate track.

Purging and Oxidating tracks automatically sets WKn to zero (not NH3

allowed). For details about technologies see chapter 12. Nitriding.

TIP

When You need to reach setpoint as fastest as possible,

You need to declare segment to be very short (1 minute)

and set X bit to 1. This way, device will not smoothly

change setpoint value because time is very short and do



Page 44 of 96

not go to the next segment until current segment setpoint

regulated.

7.2.1 Set segment tracks

To set/unset segment tracks press the tracks button in Edit segment menu.

On the segment tracks screen there are tracks A to P which can be

configured. If certain track is set (checked) its digital output will be activated

when that segment executes, otherwise if track is unchecked, appropriate

digital output will be deactivated on this segment. Technology tracks are

disabled for setting directly. Instead, they are set when appropriate technology

for segment is configured.

TIP

Use tracks to send commands to PLC or some other

electronics which can be used for automation control of

the furnace. For ex. some tracks can be activated on the

end of a programm in order to close furnace door or insert

some aditional gases.

To run the desired program go to the Normal view and on the second page

press Setpoints button. In the Setpoints screen check the Program option.

This will immediately start the first segment of a selected program and switch

the device to RUN mode.

NOTE

Some tracks are reserved for nitrocarburizing,

oxidating and purging. Go to Settings→Nitriding Settings

menu to define tracks for technologies.



Page 45 of 96

8. Control

Menu path: Main Menu→ Settings→System menu→Control.

In Control menu, user can configure parameters for temperature, Kn, N2 and

CO2 flow control.

8.1 Furnace temperature control

Temperature control parameters:

Parameter : Control preset

Values : (OFF, PID preset1, PID preset2, PID preset3)

Default : PID preset1

Description: Parameters for every loop are organized into 3 presets. Every

preset contains all control parameters that will be used if this preset is chosen

in the Control preset parameter. To deactivate control loop, chose OFF option.

Changing the PID preset parameters can be performed in:

Main Menu→ Settings→System menu→Control→Temperature

control→PID preset n

Parameter : Control type

Values: (PID, On/Off)

Default: PID

Description: Defines which type of control will be used when this preset is

active.

Parameter: Control output

Values: (Heating, Heating/Cooling)

Default: Heating

Description: Heating – 2 state control output (Heating on/off)

Heating/Cooling – 3 state output (heating, cooling and off)

Parameter: Deadband

Values: (0-40 ºC)



Page 46 of 96

Default: 5 ºC

Description: For the the 3 state output type and PID control type, defines

minimum process temperature which must be above SP to allow cooling

activator activation.

Parameter: Derivative type

Values: (Error, PV)

Default: Error

Description: When set to Error, differential term error is calculated as

difference of current and error in previous scan cycle. When set to PV,

differential term error is calculated as difference of the process values in

current and last cycle.

Parameter: Upper hysteresis

Values: (0 – 100 ºC)

Default: 10 ºC

Description: Effective only for On/Off control type. For 2 state output, heating

is turned off and for 3 state output type, cooling is turned on when the PV

becomes greater then SP+Upper hysteresis.

Parameter: Lower hysteresis

Values: (0 – 100 ºC)

Default: 10 ºC

Description: Effective only for On/Off control type. Heating is turned on when

the PV becomes lower than SP-Lower hysteresis

NOTE

Cooling PID parameters are only available if the control

output type is set to Heating/Cooling

Heating and cooling PID parameters:

Parameter: PB heating, PB cooling

Values: (0 – 9999.0 %/ºC)



Page 47 of 96

Default: 60 %/ ºC

Description: Proportional band parameter of a PID control. Smaller values

decrease system response and error amplification.

Parameter: Ti heating, Ti cooling

Values: (0 – 9999.0 % / (ºC*min ) )

Default: 10% / (ºC*min )

Description: Integration time of error. Bigger values increase system

response to error duration over time. When set to 0, integration part of a PID

algorithm is disabled.

For example: If Ti = 10%/(ºC*min ) this will produce 10% correction value (Y)

when error is 1 ºC constant in period of 1 minute. After 2 minutes it will be

20% etc.

Parameter: Td heating, Td cooling

Values: (0 – 9999.0 %/(ºC/min ))

Default: 5 %/(ºC/min ))

Description: Derivative constant of PID control algorithm. Greater value

increase system responses to process value changing in short time. When set

to 0, derivative part of a PID algorithm is disabled.

For example: If Td = 5%/(ºC/min ) this will produce 5% correction value (Y)

when error change rate is 1ºC/min. If error change rate is 2ºC/min, derivative

term will be 10%

Parameter: Cycle time heating, Cycle time cooling

Values: (0 – 1200 S)

Default: 20 S

Description: Actuators are activated when cycle time elapses. When Y =

100%, actuator will be turned on whole cycle. If the Y = 50%, actuator will be

on half cycle time. For more details view control principle chapter.

Parameter: Min. ON time heating, Min. ON time cooling

Values: (0 – 60 S)

Default: 1 S



Page 48 of 96

Description: Minimum allowed time for actuator to be activated. It prevents

turning on activators if for the small Y values and cycle times.

Parameter: Cooling factor

Values: (0 – 2.00)

Default: 1.00

Description: This parameter is available only if Heating/Cooling output is set

and the PID control type. Because heating and cooling PID parameters are

separated it is possible to use heating parameters for cooling too depending

of cooling factor value. If cooling factor is 0, cooling phase will be processed

with dedicated cooling PID parameters, If cooling factor is not equal 0, cooling

PID parameters will be the same as heating parameters except PB which will

be multiplied with the cooling factor. Therefore cooling factor determines

difference between the response of a system in cooling and heating phases.

Parameter: Control out1, Control out 2


Default: not set

Description: When not set, control output for heating, cooling, gas, air or

motorized valve will not be activated even the Y value will be affect during

control. Contol 1 output determines digital output for heating (temperature

control) or for gas or valve opening (for Kn control). Control 2 output

determines digital output for cooling (temperature control only). For details

about digital outputs assigning view the chapter Digital outputs assignment.

NOTE

If the control output is set to 2 state or analog, Control 2

output will be automatically not set (released for other

purposes). If control type is disabled both control outputs

will be not set.



Page 49 of 96

8.2 Kn control

Parameters Control preset and Derivative type have the same meaning as for

the Temperature control. PID parameters are detailed described in section 20.

“Control principle”.

Parameter: NH3 control

Values: (MFC controller, Pulse control)

Default: MFC controller

Description: MFC controller – Kn correction value (Y) will be presented on

AOUT1 in order to drive NH3 MFC.

Pulse control – desired digital output will be used for control when

no MFC controller is available. Cycle time parameter determines valve on

time when Y = 100%.

Parameter: PB

Values: (0 – 9999.0 %/ Kn)

Default: 60 %/ Kn

Description: Proportional band parameter of a PID control.

Parameter: Ti

Values: (0 – 9999.0 %/(Kn*min ) )

Default: 10%/(Kn*min )

Description: Integration time of error.

Parameter: Td

Values: (0 – 9999.0 %/(Kn/min ))

Default: 5 %/(Kn/min ))

Description: Derivative time of PID control algorithm.

Parameter: Cycle time

Values: (0 – 1200 S)

Default: 20 S



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Description: Same as for temperature control. Used only if NH3 control

parameter is set to “Pulse control”.

Parameter: Min. ON time

Values: (0 – 60 S)

Default: 1 S

Description: Same as for temperature control. Used only if NH3 control

parameter is set to “Pulse control”.



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9. Alarms

MCON Nitromat provides 4 analog alarms and one digital alarm. They can be

configured into Main Menu→ Settings→Alarms menu. There are 4 analog

alarms and one digital alarm.

9.1 Analog alarms

Analog alarms are used to check analog values such as measurement results

and to generate alarm (trigger appropriate digital output) if the value of

monitored measurement value is not valid according to the alarm constraints.

figure 23. Alarm configurations

Analog alarm has 2 sources of measurements which can be monitored. If the

source is AIN (analog input) it can be raw value (voltage or current) or scaled

value (depends of AIN configuration). For AIN source, user must insert which

analog input is attached to alarm source.

Alarm source 2 is optional and it allows that one alarm can be associated by 2

measurements in several combinations. It is possible to trigger alarm if both



Page 52 of 96

alarm sources are activated (AND), only one of sources are active (XOR) or

any of them (OR).

Value of an alarm source (temperature, Kn level or analog input value) is

compared to the lower and upper limits. Alarm is generated if value is outside

area which is defined by upper and low limits. Alarm is deactivated when

value is inside area which is defined by limits and appropriate hysteresis.

Source value

Upper limit

Lower limit

Upper hysteresisUpper limit

Lower hysteresis

Alarm status

change time

change rate

figure 24. Alarm activating conditions

Alarm source value also can be monitored by its change rate. When value

changes faster than allowed in user defined time interval, it will be triggered.

Thus change rate is value of difference in change time interval.

For example: Change rate = 20ºC and Change time is 10S. Alarm will be

activated when temperature changes above 20ºC in 10 seconds therefore

effective change rate is: 2ºC/S

Analog alarm parameters:

Parameter: Alarm source

Values: (OFF, AIN, Amb. temp, Furnace temp., H2 level, Kn value)

Default: OFF

Description: Value which will be monitored by the alarm.

Parameter: AIN

Values: (AIN1, AIN2, AIN3, AIN4, AIN5)



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Default: AIN1

Description: When alarm source is AIN, this parameter defines which analog

input is used for alarm source.

Parameter: Ain value

Values: (Raw value, Scaled value)

Default: Scaled value

Description: Raw value - analog input voltage or current value is monitored

by alarm

Scaled value - analog input scaled value (measurement) is

monitored by alarm.

Parameter: Upper limit

Values: (0- 9999.99)

Default: 0

Description: When value is above upper limit, alarm is triggered.

Parameter: Lower limit

Values: (0- 9999.99)

Default: 0

Description: When value is below lower limit, alarm is triggered.

Parameter: Upper hyst.

Values: (0- 9999.99)

Default: 0

Description: When value is below Upper limit - Upper hyst, alarm is

deactivated.

Parameter: Lower hyst.

Values: (0- 9999.99)

Default: 0

Description: When value is above Lower limit +Lower hyst, alarm is

deactivated.



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Parameter: Change rate

Values: (0- 9999.99)

Default: 0

Description: Maximum allowed difference of value in time period of Change

time.

Parameter: Change time

Values: (0- 9999.99)

Default: 0

Description: time quantum in which change rate is monitored.

Parameter: Alarm logic

Values: (OR,AND,XOR)

Default: OR

Description: Logic function performed on both alarm sources. If only one

alarm source is enabled (Alarm source parameter is not equal OFF), this

parameter will be disabled.

Parameter: Delay

Values: (0- 9999S)

Default: 5S

Description: Time after alarm activating which must elapses before triggering

digital output of alarm.

Parameter: Duration

Values: (0- 9999S)

Default: 5S

Description: Duration of alarm active state. If this value is 0 S, alarm will be

active until user stop the alarm by pressing button in the alarms

information screen. If value is not 0 S, alarm will be turned off after duration

period but it will be turned on again if alarm condition still exists.

Parameter: Inverting

Values: (NO, YES)



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Default: NO

Description: Invert the associated digital output state.

Parameter: Alarm output

Values: Values: (not set, dout 1, dout 2, dout 3 … dout n)

Default: not set

Description: Digital output used for alarm

9.2 Digital alarm

Digital alarm instead of analog inputs, monitors digital inputs. There are 2

digital inputs A and B. Digital alarm can be activated if any of A or B digital

input is active (OR logic), both of them are active (AND logic) , they are in

different state (XOR logic) or B digital input is activated after A digital input

activation after defined time.

If B is activated after A before B after A delay time, alar will not be activated.

DIN A

DIN B

B after A

B after A delay

figure 25. Digital alarm activating condition

NOTE

For the digital alarm feature it is required that digital input

module is installed in device.



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Digital alarm parameters:

Parameter: Alarm logic

Values: Values: (Disabled, A and B, A or B, A xor B, B after A)

Default: Disabled

Description: If Disabled, digital alarm will not be monitored

Parameter: Dig. in A, Dig. in B

Values: Values: (din1, din2, din3, din4)

Default: din1

Description: Digital input for digital input alarm.

Parameters: B after A delay, Delay, Duration, Inverting and Alarm output are

the same as in analog alarms!



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10. Maintenance

Maintenance is feature for monitoring system measurements and inputs and

outputs.

10.1 Measurements

Measurements screen is presented on Main

Menu→Maintenance→Measurements.

Measurements screen shows measurement values on the presented analog

inputs. On the each page of the Measurements screen are displayed

measurements for one analog input.

AIN 1

Correction Clear corr.

min: 0.29 mV

265 ºC

0.336 mVmin: 13.82 mV

Furn. temp.

37.62 ºC

figure 26. Measurements screen for AIN1

NOTE

Correction feature is only available if logged user has

enough privileges.

Press button to switch to the next analog input.

To correct current measurement value, press Correction

button and enter correct

value. Therefore a correction point will be formed and further measurements

will be corrected using this correction point.

When entering correction value, as a default value is offered uncorrected

value.



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To clear correction, press Clear corr.

button which is shown only if there are

existing corrections of measured value.

10.2 I/O overview

I/O review is used to show all analog and digital inputs and outputs in the

device which are installed. I/O screens are available in the Main

Menu→Settings→I/O Review menu.

10.2.1 Terminals

Terminals screen shows all the connections from the back side of the device.

There are 4 rows of terminals. Pressing the screen area on the each row

shows the screen with terminals description for that row of terminal.

Terminals

45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28

Terminals

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

L

N

DOUT2 (NO)

DOUT2 (COM)

DOUT2 (NC)

DOUT1 (NO)

DOUT1 ( )COM

DOUT1 (NC)

RXA

RXB

TXB / RS485 B

TXA / RS485 A

GND_ISO

A

B

GND

figure 27. Terminals screen

10.2.2 Digital outputs

This screen shows all digital outputs which are installed in the device and their

assigned function. Details are described in the 12.4 Digital outputs

assignment chapter.



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Digital outputs

Furnace Heating

DOUT1

Big NH3 MFC

DOUT2

DOUT3

DOUT4

Alarm1

DOUT5

DOUT6

TrackA TrackBDOUT7

TrackC TrackDDOUT8

figure 28. Digital outputs assignments and status

Digital outputs can be used for more than one function so they are all

displayed (for ex. Track A and Track B on DOUT7). If a digital output is

unassigned, there is no function shown on the right side (for ex. DOUT6).

When the digital output is active, it is colored with red (DOUT2, DOUT7).

Inactive digital outputs are white.

10.2.3 Digital inputs

Digital inputs screen shows all digital inputs statuses and meanings. Active

digital inputs (those with high input state) are colored red.

Active DIN1 input pauses program running (if program setpoint is selected) or

turn off control outputs (if one of fixed, remote or external setpoints is chosed).

When DIN2 is active more than 10 seconds, program goes to the next

segment. If this digital input is active more than 90 seconds, current running

program will be restarted. This digital input has no effect when no program or

production is running.

Active DIN3 switchs user level to the lowest priority (LEVEL 0) and thus forbid

access to major system functions, setpoints and parameters (See User

privileges chapter).

DIN4 can be used for Dig In alarm feature.



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Digital outputs

Control Off / Program pauseDIN1

Program next / Program resetDIN2

Block inputDIN3

Not usedDIN4

figure 29. Digital inputs functions and status

10.2.4 Analog inputs

On the analog inputs screen are shown all installed analog inputs ant their

functionalities.

Analog inputs

AIN1 - Thermocouple B - Furnace tempCalib. date: 01/08/2013

AIN2 - 40-20 mA Rext - H2 SensorCalib. date: 01/08/2013

AIN3 - 40-20 mA Rext - MFC N2Calib. date: 01/08/2013

AIN4 - 40-20 mA - MFC NH3Calib. date: 01/08/2013

AIN5 - 40-20 mA - MFC CO2Calib. date: 01/08/2013

figure 30. Analog inputs screen

10.2.5 Analog outputs

Analog outputs screen shows all analog outputs which are installed in the

device. For every analog output are displayed function and calibration info as

well as current value in milliamps.



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Analog outputs

AOUT 1- 4-20 mA MFC NH3Calib. date: 01/08/2013

AOUT 2- 4-20 mA MFC N2Calib. date: 01/08/2013

AOUT 3- 4-20 mA MFC CO2Calib. date: 01/08/2013

AIN4 - OFFCalib. date: 01/08/2013

12.45 mA

6.20 mA

4.00 mA

figure 30. Analog inputs screen

10.3. Digital outputs assignment

Digital outputs numbed depend on installed modules. Device has built in

digital outputs 1 and 2 on the first terminal row (pins 3 to 8).

Every digital output can be assigned to one of functions:

1) control output

2) alarm

3) program track

4) Big NH3 MFC

User can view current digital outputs configuration in the I/O review screen:

Menu→Settings→I/O Review→Digital outputs.

On this screen are listed all installed digital outputs and their functions. Also

this screen shows current dout status. With white color is represented logic

state “0” or open relay. When the DOUTn label becomes red, it means that

this dout is activated or relay is closed (logic “1”).

Assigning dout’s functionalities is performed in the settings for control, alarms,

programs or nitriding.

1) Set control digital outputs.

User can chose digital outputs for the control loop in

Menu→Settings→Control menu.



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For the Temperature control those outputs are for heating and for cooling and

for Kn control outputs are for valve pulse width control (if NH3 control

parameter are set to “Pulse control”).

In all loops there are Control 1 and Control 2 items where user can chose

which digital output will be used for this control output.

If the current PID preset is disabled, both Control outputs are disabled too and

their values automatically set to not set value. If current PID preset is

configured to have 2 state output (heating only, or 2 state output), user can

only choose Control out1. Control out2 is enabled only for 3 state outputs in

temperature control (heating/cooling). Also if the current PID preset is set to

produce analog output both control outputs are disabled.

2) Set alarm dout

User can chose digital outputs for the control loop in

Menu→Settings→Alarms menu

In alarm menu user can chose alarm output as one of offered digital

outputs.

If alarm is disabled, alarms output is disabled too and automatically set

to not set value

3) Program tracks

Control tracks can be customized in Menu→Programs→Config tracks

menu.

There are 16 items, one for every track (A to P). User can chose digital output

for every track or can set it to not_set value. If track output is not_set it not

trigger any of digital outputs but remote devices can accept track status via

communication.

4) Big NH3 MFC

Big NH3 MFC digital output can be configured in Menu→Settings→Nitriding

settings .

10.3.1 Digital output assignment constraints



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When user select digital output for some functionality, there will be shown

(enabled) only those digital outputs which are not already used by some other

function. There are some rules which are automatically performed when

selecting digital outputs and which disables used dout’s.

Digital output for control cannot be used for any other function, thus it

will be disabled when selecting in other functions.

Digital output for alarms cannot be used for any other function, thus it

will be disabled when selecting in other functions.

Digital output for tracks can duplicated. For ex. track_a and track_e can

be both on dout_5, or track_b and big NH3 MFC out can be both on

dout_7. According to previous rules, track digital outputs cannot be the

same digital outputs used for control or alarm.

Big NH3 MFC output can be the same as track output but not the same

as control or alarm output.



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11. Analog inputs

Analog inputs can be configured in Main Menu→Settings→Analog inputs

menu.

11.1 Analog input 1

Analog input 1 (AIN1) is for the furnace temperature measurement. Therefore,

only parameter which can be configured for AIN1 is Thermocouple type.

11.2 Analog input 2

Analog input 2 (AIN2) is for connecting H2 sensor (Kn level measurement).

AIN2 is 4-20 mA input. Parameters for AIN2 are scaling in %H2 for H2 sensor.

11.3 Analog input 3

Analog input 3 (AIN3) is for connecting output from N2 MFC (N2 flow

measurement). AIN3 is 4-20 mA input. Parameters for AIN3 are scaling in

m3/h for N2 flow.

11.4 Analog input 4

Analog input 4 (AIN4) is for connecting output from both NH3 mass flow

controllers (big and/or small one). AIN4 is 4-20 mA input. Parameters for AIN4

are scaling in m3/h for NH3 flow for both small and big NH3 MFC.

11.5 Analog input 5

Analog input 5 (AIN5) is for connecting output from CO2 MFC (CO2 flow

measurement). AIN5 is 4-20 mA input. Parameters for AIN5 are scaling in

m3/h for CO2 flow.



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11.6 Analog inputs parameters

Analog inputs parameters for AIN1 only:

Parameter: Thermocouple

Values: Values: (B,C,E,J,K,L,M,N,R,S,T)

Default: B

Description: Type of thermocouple. Available only if input type is set to

Thermocouple.

Analog inputs parameters for AIN4 only

Parameter: NH3 small start

Values: Values: (0-9.0 m3/h)

Default: 0 m3/h

Description: NH3 flow which will be measured on 4 mA with small MFC.

Parameter: NH3 small end


Default: 10 m3/h

Description: NH3 flow which will be measured on 20 mA with small MFC.

Parameter: NH3 big start


Default: 0

Description: NH3 flow which will be measured on 4 mA with big MFC.

Parameter: NH3 big end


Default: 100 m3/h

Description: NH3 flow which will be measured on 20 mA with big MFC.



Page 66 of 96

12. Nitriding Nitriding and Nitrocarburizing process control contains next phases:

Heating up – reaching gas release temperature before inserting gas into furnace.

Oxidating – temperature control with air insertion with the program track

Purging – purging track is activated which opens purging gas valve (usually N2 gas)

Kn control – inserting ammonia and N2 to achieve desired Kn

Nitrocarburizing – Kn control with CO2 flow enabled and nitrocarburizing track activated

On the next table are shown nitriding phases and conditions in which every phase can be executed when program control is active:

Nitriding phase Condition NH3 flow N2 flow CO2 flow Heating up Every segment with WKn >0 and T

< Tgr disabled disabled disabled

Oxidating Every segment disabled disabled disabled Purging Every segment disabled disabled disabled Initial gassing First segment with WKn >0 and T

> Tgr disabled disabled disabled

Kn control Segment in which WKn > 0 enabled enabled disabled Nitrocarburizing Segment in which WKn > 0 and

nitrocarburuzing technology selected

enabled enabled enabled

*Tgr – gas release temperature If process is controlled via program there are next steps in control workflow which are executed sequentially:

- Segments before first one which have WKn > 0 can be configured for heating with oxidating, purging or heating only (WKn = 0). First segment has WKn always set to zero which ensures that before NH3 gas inserting, furnace atmosphere must be heated up, charge should be oxidated or atmosphere should be purged. Heating can be performed with oxidating which insert air into furnace or with purging which insert N2.

- First segment with WKn > 0 allows gas flow but only If temperature is

higher than gas release temperature. If at the beginning of this step, temperature is not enough, heating up is performed.

- After heating up, furnace is charged with certain amount of ammonia and N2/CO2 in phase “Initial gassing”. Ammonia insertion is maximal (Y = 100%) and N2 and CO2 flows are defined by program settings.

- After initial gassing phase, device starts temperature and Kn control according to program steps.



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- During program execution, after initial gasing complete, N2 flows is always allowed (defined as WN2) and CO2 flow (WCO2) is only allowed in segments with set nitrocarburizing track. Both N2 and CO2 flows are disabled in oxidating and purging. In purging segments, N2 is inserted with track which turns on purging N2 valve.

- Process can be finished with oxidating then purging and cooling down.

On the next table are shown steps recommended initial steps for program control: seg WT WKn/tech NH3 flow N2 flow CO2 flow Kn

control

1. xxx WKn = 0 in first program segment.

disabled disabled disabled disabled

2. xxx oxidating disabled disabled disabled disabled

3. xxx purging disabled disabled disabled disabled

4. >= gas release temperature

Kn control, Kn > 0 T > Tgr* T > Tgr disabled enabled after heating up and initial gassing complete

5. >= gas release temperature

Kn > 0 and nitrocarburizing tech.

T > Tgr T > Tgr T > Tgr enabled

*Tgr – gas release temperature When fixed setpoint is selected rather than program, initial gassing phase is escaped depending of “Init. gas if H2 <” parameter and WKn and gas release is always blocked below defined temperature. See Nitriding settings for details. Oxidating and Purging phases are not supported for fixed setpoint process control.

12.1 NH3 MFC type

MCON Nitromat can be configured for applications where two NH3 mass flow controllers are used. One should be small which will be used when small NH3 flow is required. Another NH3 should be with at least 5 times greater NH3 flow range. This big NH3 MFC should be used when required flow of ammonia is higher than smaller MFC and in initial gassing phase (when Y = 100%). Therefore small MFC is used for better accuracy and bigger is suitable for faster control but eith loss in accuracy. User can chose the type of NH3 MFC which will be used for program or setpoint. If both (small and big) MFC are set device automatically determines when to use which one. When big NH3 MFC is active, certain digital output is high and it should be connected to the hardware which commutates these two MFC controllers. Switching between two MFC is performed on Y(small) and Y(big) boundaries of Y value with hysteresis (see the figure 31).



Page 68 of 96

%100*)_3_/_3_(*9.0 endnhsmallendnhbigYsmall

%100*)_3_/_3_(*1.1 endnhsmallendnhbigYbig

Y(small)

Y(big)

Y (%)

big/small

big

small

figure 31. NH3 MFC type switching

12.2 Nitrocarburizing

Nitrocarburizing allows applying desired flow of CO2 into furnace. For every

program or fixed setpoint , nitrocarburizing can be enabled or disabled. When

disabled, CO2 flow is off.

In Nitriding settings there is a track which is associated with nitrocarburizing.

For fixed setpoints, this track will be set always if nitrocarburizing is allowed.

For programs, user set this track in segments in which nitrocarburizing will be

performed but only if nitrocarburizing is allowed for that program.

12.3 Nitriding settings

Nitriding settings is menu which contains configurations specific for the

nitriding/nitrocarburizing process. Nitriding settings are available in Main

Menu→Settings→Nitriding settings menu.

Nitriding parameters: Parameter: Gas release temperature

Values: Values: (390-1100 ºC)

Default: 450 ºC



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Description: Minimum temperature required to allow gas flows (NH3, N2 and

CO2).

Parameter: Initial gasing

Values: Values: (0-100 m3)

Default: 5 m3

Description: Gas volume which must load the furnace before start program

control. Usually is not less than 5 time of the furnace volume.

Parameter: Init. gas if H2 <

Values: Values: (0-100 %)

Default: 0 %

Description: If zero (0%) initial gas is performed only if WKn > 0. If not zero,

initial gassing is started only if WKN >0 and measured H2-concentration < xx

%H2. This parameter is only effective for fixed setpoints. For programs, initial

gassing is always performed.

Parameter: Init. gasing time

Values: Values: (0-100 min)

Default: 10 min

Description: If no NH3 MFC presented, this parameter defines how long initial

gas phase will be active because there is no measurement of NH3 flow.

Parameter: Big NH3 DOUT


Default: not set

Description: Digital output which will be active when big NH3 MFC is used.

Parameter: Nitrocarb. track

Values: (track A, track B, track C, track D … track P)

Default: track N



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Description: Track which must be set to allow CO2 flow (nitrocarburizing)

when program runs, or when nitrocarburizing is enabled when fixed setpoint

used.

Parameter: Oxidating track


Default: track O

Description: Track which is active when program runs oxidating segment.

Parameter: Purging track


Default: track P

Description: Track which is active when program runs purging segment.



Page 71 of 96

12.4 Scaling Analog Out

Analog outout used to control mass flow controllers can be configured in Main Menu→Settings→Nitriding settings→ Scaling Analog OUT menu.

12.4.1 AOUT1- MFC NH3

This analog output is used for control both big and small NH3 MFC if analog control output is used for Kn control. (Kn control settings).

Parameters:

Parameter: NH3 small start

Values: (0 – 9.0 m3/h)

Default: 0 m3/h

Description: NH3 flow which produce 4 mA analog output for small NH3 MFC.

Parameter: NH3 small end

Values: (1 – 10.0 m3/h)

Default: 10 m3/h

Description: NH3 flow which produce 20 mA analog output for small NH3

MFC.

Parameter: NH3 big start

Values: (0 – 90.0 m3/h)

Default: 0 m3/h

Description: NH3 flow which produce 4 mA analog output for big NH3 MFC.

Parameter: NH3 big end

Values: (10 – 100.0 m3/h)

Default: 100 m3/h

Description: NH3 flow which produce 20 mA analog output for big NH3 MFC.



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12.4.2 AOUT2 and AOUT3 (MFC N2/CO2)

These analog outputs are used for control N2 or CO2 flow with mass flow controllers. WN2 and WCO2 are scaled to current output (4-20 mA) on AOUT2 and AOUT3 respectively. Values for these parameters depend on mass flow controllers flow ranges.

Parameters:

Parameter: Low value

Values: (0 – 30.0 m3/h)

Default: 0 m3/h

Description: Minimal WN2/WCO2 value which generates 4 mA output.

Parameter: High value

Values: (0 – 30.0 m3/h)

Default: 0 m3/h

Description: Maximum WN2/WCO2 value which generates 20 mA output.



Page 73 of 96

13. Communication

Communcication settings are available in the Main

Menu→Settings→Comm. config menu. In the communication configirations

menu there are submenus for every communication interface settings.

13.1 Com1 and Com2

Com1 is isolated communication interface which can be either MODBUS

master or PROFIBUS slave protocol depending on purchased unit.

There are several communication protocols which is implemented. ON the

table below is given overview of MCON Nitromat communication protocols

and their description.

PROTOCOL Interface Description

MODBUS Master Com1 or Com2 Used for connecting remote

peripherals such as I/O expanders,

actuators and for remote setpoints.

MODBUS Slave Com1, Com2 or

Ethernet

Connecting with masters which can

read and write parameters to device

and monitor device statuses and

measurement values remotely.

PROFIBUS Com1 Connecting to PROFIBUS network and

provide interface for writing and

reading common parameters and data.

List of addresses for the MODBUS Slave and PROFIBUS protocols can be

found in the C300 Communication protocols reference manual. For Modbus

Slave, addresses and commands are the same regardless of communication

interface.

Com1 and Com2 parameters

Parameter: Protocol



Page 74 of 96

Values: Values: (OFF, Modbus Master, Modbus Slave, PROFIBUS)

Default: OFF

Description: When OFF, this communication interface is not used. Com1

protocol can be only PROFIBUS (if device with PROFIBUS is ordered) or

Modbus Master, Modbus Slave if device with RS485/422 is ordered.

Next parameters are only available for non PROFIBUS protocol selected!

Parameter: Baud rate

Values: Values: (4800 bps, 9600 bps, 19200 bps, 38400 bps, 57600 bps,

11520 bps)

Default: 4800 bps

Description: Communication speed for non PROFIBUS prototols.

Parameter: Parity

Values: Values: (even parity, odd parity, no parity)

Default: even parity

Description: Parity bit configuration.

Parameter: Stop bits

Values: Values: (1 stop bit, 2 stop bits)

Default: 2 stop bits

Description: Number of stop bits in the serial communication frame.

Parameter: Address

Values: Values: (0-255)

Default: 1

Description: Device address for the on the communication interface. When

MODBUS Master is set, this address determine address of a remote device

which is pooled to obtain remote setpoints.



Page 75 of 96

13.2 Ethernet communication

Ethernet communication interface provides connectivity to the MODBUS

network as a slave or web server access to the device via web browser.

Parameter: DHCP

Values: Values: (checked, unchecked)

Default: checked

Description: If checked, then IP address, Gateway and subnet mask are

obtained from the DHCP server (automatically). When unchecked, user must

insert these values manually.

Parameter: IP address

Values: Values: (127.0.0.1 – 255.255.255.254)

Default: 192.168.1.110

Description: IP address of device

Parameter: Gateway IP

Values: Values: (127.0.0.1 – 255.255.255.254)

Default: 192.168.1.110

Description: Address of a gateway on which device is connected

Parameter: Subnet

Values: Values: (127.0.0.1 – 255.255.255.254)

Default: 192.168.1.110

Description: Subnet mask for the network on which the device is connected.

NOTE

When used as MODBUS Slave, Ethernet interface provides

the same MODBUS services on the same addresses as

when used on the Com1 or Com2 interface.



Page 76 of 96

To access the MCON Nitromat via web server first check the device IP

address (either entered or assigned by DHCP). Then type this address on the

web browser and web page with measurements will appear.



Page 77 of 96

14. User privileges

Device has 5 user levels which determine functions availability depending on

logged user privileges. After starting device, user need to logon to the device.

Logging process requires inserting appropriate username and password.

If no user logged, the only enabled menu is User Login available in the Main

Menu→Settings→System→User Login menu. In this menu, operator can

insert valid user name and password and thus get the appropriate user level

privilege which allows access to certain functions and parameters changing.

After inserting username and password, press Submit button to login with

inserted data. If the username and password are incorrect, an error message

appears. Access level of logged user is visible in the System informations

screen.

NOTE

If there is no users defined (when device is new), default

User level is always Level5 until You create some users.

If there are some users defined, device will always start

with Level0 privilege and You must log in to get higher

access level.

Logged user has its own user privilege which can be one of those: Level5,

Level4, Level3, Level2 or Level1. Level5 has the highest priority and user with

that privilege has all access rights. On the other side, Level1 allows only small

amount of functionalities to the user and it is used to prevent changing critical

system parameters by the unauthorized persons.

On the next table are listed device features and required user level for them to

be accessible.

Feature(Action) L5

L4

L3

L2

L1

L0

View Proces data X X X X X X

Chose setpoint(SP1,SP2…) X X X X

Edit setpoints X X



Page 78 of 96

Change programs data (segments and programs

name)

X X X

Run programs X X X X

Pause programs X X X X

Backup parameters X X X X

Backup programs X X X X

Change PID preset X X X X

Edit PID preset X X X

Factory reset settings X

Change communication parameters X X X

Change analog inputs parameters X X X

Change analog output scaling X X

Change nitriding settings X X

Change language X X X

Change temperature unit X

Change date and time X X X

Correct measurement X X

Start/Stop logging X X X X X

Edit loging settings X X X X

Transfer logged data to USB stick X X X X X

Edit alarms X X X X X

Fast edit setpoints(on screen typing) X X

Create new user X

Delete user X

Change user password X

Change own password X X X X X

Change user access level X

Touch screen calibration X X

Assign digital outputs to alarms, tracks etc X

Test digital outputs X



Page 79 of 96

14.1 Users management

User with highest privilege (Level5) has the ability to add new users, delete or

change user privilege of the existing users. Therefore for those users menu

item Users in the Main Menu→Settings→System→Users menu is enabled.

Pressing Users button opens Users screen where re displayed all user

accounts created on the device. There are maximum 10 users which can be

created. To create new user, press the button Add new

and insert desired

username, password and access level for new user. In the new user dialog

screen, press the Cancel button to back to the Users screen without adding

the new user. Regular returning to Users screen adds new users which will be

displayed last in the users list.

To change user’s password or user level, press EditEdit button which opens the

screen where you can insert new password or to select new user level.

Existing users can be deleted from the system by pressing the button. After

confirmation, user will be deleted from the system.

Users

mesa Level 5 Edit

John Level 1 Edit

Frederick Level 1 Edit

Peter Level 4 Edit

Reinhard Level 3 Edit

Add new

figure 32. Users screen



Page 80 of 96

15. System settings

System settings are available in the Main Menu→Settings→System menu.

In the System menu user can set next parameters:

Parameter: Date/Time

Values: Values: (01/01/1970 – 19/01/2038)

Default: 31/12/2011 12:00

Description: System date and time. To see the current date and time go to

Main Menu→Settings→System informations screen.

Parameter: Language

Values: Values: (English, German and other depending on order)

Default: English

Description: System language. Used to display all the informations on the

screen.

Parameter: Temperature unit

Values: Values: (Celsius ºC, Fahrenheit ºF)

Default: Celsius ºC

Description: Selects temperature unit which will be used for all temperature

measurements and displaying the results.

15.1 System informations

To show informations screen press the System informations button in Settings

menu.

System informations screen shows software version, device identification

number, current ambient temperature and date and time. On the second page

are displayed installed modules in the device. Press button to switch

between pages.



Page 81 of 96

System informations

Firmware version 1.00

Amb. temp : 28.12 ºC

Date/Time 08/08/2013 03:44:22

UID :ed1931 - 7b01 - e33a4d3445

S/N : 1

User level: Level5

I/O Modules

MODULE 1 AOM

MODULE 2 AOM

MODULE 3 Relay3

MODULE 4 Empty

MODULE 5 Empty

MODULE 6 Empty

figure 33. System informations and installed modules

15.2 System functions

System functions are available in the Main Menu→Settings→System menu.

Functions are available only if user has the highest access level. See User

privileges chapter for details.

15.2.1 Touch screen calibration

To improve touch screen accuracy it is good practice to calibrate the screen.

On the calibration screen, press the cross which appears on the upper-top

position of the screen. After pressing, cross moves to the center of the screen

and then again on the bottom-right. After pressing third calibration point,

device automatically returns from the calibration screen and remembers

calibration data. Therefore calibration will take effect immediately (without

restarting the device).

If the screen is not calibrated properly, user may not be able to activate

calibration. In that case, a keyboard must be used to go to the System menu

and to press the Calibration screen feature.

To achieve better calibration accuracy it is good practice to use a pen for

calibration when pressing the calibration points.

Touch the cross by stylus.

figure 34. Touch screen calibration



Page 82 of 96

15.2.2 Factory settings

Press Factory settings button in System menu to reset all parameters to their

default values. This will also delete all user accounts.

When loading factory settings is complete, device will resets automatically.

15.2.3 Parameters backup

MCON Nitromat has a feature to save and load parameters values to USB

stick.

To save or load parameters, USB stick must be inserted, otherwise an error

message will be shown. This feature is forbidden in RUN mode.

To save parameters to USB stick press the Save config to USB button in the

System menu. It will save all parameters value into n300_cfg.bin file.

To load parameters from the USB stick press the Load config from USB

button in the System menu. Then the device will search for the n300_cfg.bin

file and load file data to restore all parameters settings. After loading

parameters, device will automatically restart.

15.2.4 Programs backup

Programs backup are similar to the parameters backup. It can be performed

with Save programs to USB and Load prog. from USB functions in the System

menu. This feature is also forbidden if device is in RUN mode.

After loading programs, device will not restart!

15.2.5 Firmware update

MCON Nitromat software can be updated with new one by using USB

memory stick. It is recommended that user checks if there is new version of

device software for updating. To find the newest firmware version contact the

producer.

Firmware file name is image.s19 and it must be placed on root directory in the

USB memory stick.



Page 83 of 96

To start firmware update reset the device (turning on then off power supply or

by pressing Reset button in System menu) then immediately press and hold

Enter taster. Device will show white screen and TX LED on. Then insert USB

stick with firmware file which will automatically start updating process. During

firmware updating process, TX led will flashes fast until the end of the

updating. After update finishes, device will started automatically running new

firmware



Page 84 of 96

16. Logging

This feature allows measurement data to be logged during the control

process. Every log session stores data into one file. Log session can be

started manually or at desired time. Also it can be stopped manually or

automatically. When log session ends, log file is created and it can be

transferred to USB stick.

Logging functions are available in logging screen: Main Menu→Logging

Logging

Logging in progress

Stop Usb transfer Settings

Duration : 00:22:43

Start Time : 09/02/2013 13:00:00

End Time : 09/02/2013 18:00:00

Log files : 12

figure 35. Logging screen

To start logging go to Main Menu→Logging screen and press Start button. If

there is no enough memory space for new logging file, an error message will

be displayed.

Logging session can be ended by pressing Stop button or at desired time

depending on logging settings.

When the logging is not in progress (logging status label shows Logging Off),

user can transfer all log files onto USB stick by pressing USB transfer button.

Before this operation you must be sure that the USB stick is properly inserted.

Logged files will be transferred to USB stick root directory.

NOTE

After transferring log files to USB, they will be deleted from

the device.



Page 85 of 96

Logging parameters:

To configure logging parameters press the Settings button which opens menu

with logging settings. There are next logging settings which can be

configured:

Parameter: Log info

Values: Values: (name up to 15 characters)

Default: Log info

Description: Symbolically represents log session. This info will be visible when

log file is loaded via dedicated PC software.

Parameter: Logging mode

Values: Values: (Manual, Auto Start, Auto Stop, Auto Start/Stop)

Default: Manual

Description: Manual – user directly starts and stops logging

Auto Start – logging automatically starts at desired time and stops

manually

Auto Stop – logging manually started and automatically stopped

at desired time

Auto Start/Stop – logging automatically started and automatically stopped at

desired time

Parameter: Sample time

Values: Values: (1 – 1000 S)

Default: 5 S

Description: Time interval on which new measurement value will be captured

and logged to a file.

Parameter: Start Time

Values: Values: (01/01/1970 – 19/01/2038)

Default: 31/12/2011 12:00

Description: When the Auto Start or Auto Start/Stop mode is selected, this

time determine when to start new logging session.



Page 86 of 96

Parameter: Stop Time

Values: Values: (01/01/1970 – 19/01/2038)

Default: 31/12/2011 12:00

Description: When the Auto Stop or Auto Start/Stop mode is selected, this

time determine when to stop logging session.

16.1 Logging channels

Logging channels are measurement values which can be logged. User must

select minimum one log channel in order to start logging. In the Logging

Settings menu there is an item Logging channels which opens list with

channels:

Furnace temp. – logs furnace temperature

External H2 – logs %H2 from H2 sensor

Kn value – logs measured Kn

NOTE

Log channels which are selected but not present will be

loggeded as 0 on every sample period.

After transferring log files to USB, logged data can be examined via dedicated

PC software tool “C300 view”.

figure 36. MCON Nitromat low files viewer



Page 87 of 96

17. Control principle Temperature control can be performed by either PID or On/Off control, while

Kn control is only PID. When PID is used, actuator can be controlled by one

digital output (2 state output), 2 digital outputs (3 state output) or with analog

output (if present). For On/Off control type, only digital outputs are available

for controlling the actuator.

N2 and CO2 flows are controlled with mass flow controllers on the AOUT2

and AOUT3.

17.1 PID control

For PID control desired process value or setpoint (SP) is compared with

current process value measured from the process (PV). According to

difference between SP and PV and PID parameters, PID loop output is

generated (Y). Output value (Y) can be from -100 % to +100%. Y is negative

when the PV is greater than the septoint (SP) and the 3 state output is

selected in PID preset parameters.

Positive Y (with range from 0 to 100%) is directly proportional to the amount of

drive which must be applied to the actuator on output 1.

Negative Y (from 0 to -100%) is directly proportional to the amount of drive

which must be applied to the actuator on output 2.

When the Y = 0 no actuator will be activated.

figure 37. Control block diagram

PID value Y depends on error and PID parameters:

DIPY

where:



Page 88 of 96

P – Proportional term which depends on current error

I – Integral term which depends on error duration in the integral time interval

D – Derivative term which depends on the short time error fluctuations

PID terms are calculated using process error e and parameters.

Error is defined as:

PVSPe

Proportional term P

Proportional term is proportional to the process error (e) multiplied with

proportional band (PB)

PBeP

For increasing sensitivity to error, PB must be increased.

There are 2 proportional band parameters. One is required for heating/valve

and second is only effective for 3 state outputs (cooling) in the cooling phase.

Example for Kn control:

If PB1 = 100%/Kn, PB2 = 50%/Kn and SP = 5 Kn for the measured Kn of

4.8, error will be 0.2 Kn and P term 0.2*100 = 20%

If measured Kn is 5.2 error will be also 0.2 but negative. In that case P term

will be zero. For temperature control, negative error will result in negative P

term which then control cooling phase.

Integral term

Integral term is very important for the process control in order to avoid “steady

state” error which occurs when controller cannot reach setpoint value if only

proportional term is used. For that reason integral term will add extra control

which will compensate steady state error.

Integral term depends on integral time (Ti) parameter and error sum during

time.



Page 89 of 96

Integral term is calculated using next equation:

TieI

Integral time (Ti) is parameter which determines how the system reacts to

error during the certain time period. Therefore, increasing the Ti will increase

the response to accumulated error.

For example if Ti is 25%/(Kn*min), integral term I will be 25% when error is 1

Kn for 1 minute time period.

Good practice is to set Ti = 0 (disable integral term) and adjust gain with PB

parameter (Y = P term) to have minimal steady state error with no oscillating.

Then turn on I term by set Ti parameter to a value on which the system will

control the process with minimal over/under shoot and minimal oscillating.

Derivative term

Derivative term is used to control short term fluctuations in PV. Derivative term

is proportional to error or PV change rate:

eTdD

or

PVTdD

e - Error change rate

PV - Process value change rate

Td parameter defines how the error or PV change rate will be emphasized,

For example if Td is 400%*(Kn/min), derivative term will be 100% when Kn is

changed by 0.25 Kn in one minute or Kn in 15 seconds.

Depending on Derivative type parameter derivative term calculation will be

perform with error or process value change rate.

Td parameter (derivative time) emphasizes control output when error or

process value rising or falling rapidly. For that reason, Td should not be very

long because system will oscillate if process value is noisy. Main function of

derivative term is to prevent overshot and to faster the system response.



Page 90 of 96

17.2 Discrete control output

Control output value Y (in literature well known as MV – manipulation value) is

given in percents which must be translated to digital outputs states. For this

transformation, important parameter is Cycle time. Cycle time defines how Y

value is translated to actuator activation time.

For ex. if Y=40% and Cycle time is 10 seconds, digital output for heating or

gas valve will be activated for 4 seconds and turned off 6 seconds.

When 3 state output is set (heating) Y can be negative. In that case is used

another Cycle time (cooling cycle time) parameter which is scaled to Y

absolute value.

figure 38. Control outputs activation

In the example controlling diagram above is showed how the actuators are

turned on and off depending on difference between process value and

setpoint. In the time interval (1), PV is much lower than setpoint, so heating

output must be turned on more than half of the cycle time. During heating,

temperature (process value) raises above setpoint but in the interval (2)

heater is turned off and temperature stars to fall until expiration of cycle time1

which is defined for heating only. At the beginning of second cycle (3),

process value is slightly above setpoint value but heating will again turned on

because of accumulated error in integral term. This cause shorter activation



Page 91 of 96

the heating actuator until interval (4) when temperature starts to fail again.

After second cycle time expired (5), process value is notably greater than

setpoint including dead band (see Deadband parameter). This means that

system must activate cooling actuator in cycle time 2 (which is defined for

cooling and air actuator as parameter). Cooling cause the temperature lowers

faster than in case when no cooling is activated which can be noted by

comparing interval (5) and (6) process value trend. In the interval (7), after first

cycle time2 interval, temperature is again below setpoint and heating must be

turned on again. Out 2 is only activated if proper control output is set (3 state

output).

17.3 On/Off control

This is the simplest control type which is implemented in the device and only

available for temperature control. When this control type is used, all PID

parameters will be disabled because they have no meaning for this type of

control. For On/Off control type is important only Upper Hysteresis and Lower

Hysteresis parameters.

When loop output is configured to 2 states, control output will be on when

temperature is below setpoint (SP) + Lower_Hysteresis. Actuator will be

turned off when PV becomes greater than SP + Upper Hysteresis.

OUT1

FLU

SH

ING

FL

US

HIN

G

PV

SP

Upper hysteresis

Lower hysteresis

figure 39. On/Off control for 2 state output

– Lower_Hysteresis and cooling is activated when PV becomes greater than

SP + Upper_Hysteresis. Actuators are turned when PV reach setpoint.



Page 92 of 96

OUT1

FLU

SH

ING

FL

US

HIN

G

PV

SP

Upper hysteresis

Lower hysteresis

OUT2

figure 40. On/Off control for 3 state output

Upper and lower hysteresis parameters must be set properly to achieve

compromise in relays activating frequency and process value stability. If

hysteresis value if very low then relays will be activated very frequently and if

hysteresis is very high then process value will oscillate between unaccepted

minimum and maximum values.

17.4 Analog control

This type of output control is available only for Kn control. If Analog output

type is selected, AOUT1 is used to control NH3 MFC

When all is properly configured, on desired analog output will be present Y

value as current/voltage where the scaling can be custom defined in analog

output settings.

Analog output value will be changed on time intervals defined with Cycle time

parameters. Therefore when cycle time expires, analog output value will be

updated with the current Y value which will be presented on analog output

until next cycle.

FL

US

HIN

G

Vout (Iout)

10 V (20 mA)

2 V (4 mA)

Y (%)20% 80 %

Analog output value when scaled to 20-80% range



Page 93 of 96

18. Specifications

Construction: - ABS DIN ¼ case for front mounting - Type of protection IP54 - Dimensions 96 x 96 x 111 mm

Power supply: - AC 85VAC…265VAC, 50-60Hz or DC 10VDC…36VDC. Power consumption 15VA Display: - Color TFT display, 320 x 240 px, 16it, 3.5’ with resistive touch screen Operation: - Touch screen menu guided and and/or four keys (up/down/enter/escape) Control loops: - 2 control loops - 3 control parameters preset per each loop - 2 open loop controls for N2 and CO2 flow - PID or On/Off control type - Control output types: heating/cooling for temperature control and digital or analog for Kn control. - N2/CO2 flow control with MFC - Custom assigning digital outputs for control Setpoints: - 4 fixed setpoints, external and remote setpoint - 99 programs with Kn and furnace temperature setpoints. - Up to 24 segments per program - 16 tracks per segment - Custom assigning digital output for every track Nitriding options: - Kn calculation with %H2 measurement and N2/CO2 flow - small or/and big NH3 MFC support - oxidating, purging and nitrocarburizing in desired program steps - initial gassing and gas blocking features Alarms: - Up to 4 user defined alarms for monitoring measurement values and change rates. - Custom assigning digital outputs for alarms Logging: - Logging sample time from 1 to 1000 seconds - Up to 20 log files can be stored to internal memory. - Logging on user demand or time activated.



Page 94 of 96

- Transferring log data to USB stick - Special software for viewing log data User access levels: - Up to 10 user accounts can be stored - 6 access level to grant privilege to users Communication interfaces: - Ethernet - isolated RS485/422 (optional) - PROFIBUS (optional) - non isolated RS485/422 (standard) Supported protocols: - MODBUS Master RTU or TCP - MODBUS Slave RTU or TCP - Webserver - PROFIBUS Analog inputs: 5 or 7 isolated analog inputs - AIN1 : thermocouple (B,C,E,J,K,L,M,N,R,S,T) / voltage 0-100mV - AIN2: H2 sensor (4-20 mA) - AIN3: N2 flow (4-20 mA) - AIN4: NH3 flow (4-20 mA) - AIN5: CO2 flow (4-20 mA)

Analog inputs ranges:

Type Measuring range Generating accuracy

resolution

TC B - PtRh-Pt6% 250...1820°C <3ºC 0.15ºC

TC C - W5%Re-W26%Re 0...2315°C <2°C 0.2ºC

TC E - NiCr-CuNi -200...1000°C <2ºC 0.05ºC

TC J - Fe-CuNi -210...1200°C <2ºC 0.06ºC

TC K - NiCr-Ni -200...1350°C <2ºC 0.06ºC

TC L - Fe-CuNi DIN -200...900°C <2ºC 0.06ºC

TC M - NiMo/NiCo -50...1410°C <2ºC 0.06ºC

TC N - Nicrosil-Nisil -200...1300°C <2ºC 0.1ºC

TC R - PtRh-Pt13% -50...1760°C <2ºC 0.1ºC

TC S - PtRh-Pt10% -50...1760°C <2ºC 0.1ºC

TC T - Cu-CuNi -200...400°C <2ºC 0.1ºC

Cold junction sensor -25ºC…+85ºC 1,5ºC 0.1ºC

Current inputs -5mA…+25mA 0.1% 1uA

Analog outputs: - 3 analog outputs for NH3, N2 and CO2 mass flow controllers - AOUT1 scaled for both big and small NH3 MFC Analog outputs ranges

Digital inputs:

Ratings Max. Load Resolution Accuracy

0mA…20mA 4mA…20mA

<500 16 bit 0.05%



Page 95 of 96

- 3 isolated digital inputs - Trigger voltage > 8V - Hysteresis 2V IN0: program pause IN1: switch to next segment IN3: inputs disable (lock user interface) Digital outputs: - 2 fixed digital outputs: NO/ 250V/ 5 A - Up to 24 additional digital outputs depending on installed modules Digital outputs functions: - control outputs (heating/cooling, gas valve), alarm outputs, program tracks, big NH3 MFC Digital output modules (up to 6 modules can be installed)

Climate: - Storage: -10 ºC - + 60 ºC - Operation: ºC - + 50 ºC Optional accessories: - Auxiliary unit REL45 (only if OC12 module is used) - C300 log viewer software

Type Standard / option Ratings

REL1 4 common Relays, NO,

contact 250V/3A

REL2 2 separate

Relays, NO/NC contacts

250V/5A

REL3 3 common relays,

NO contacts 250V/3A

OC12 module 12 open collector

outputs with common ground

24V/100 mA



Page 96 of 96

18.1 Isolation diagram

figure 44.MCON Nitromat isolation diagram

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