MODBUS 485 RTU Manual 150401 KH - EKO Instruments · MODBUS 485 RTU CONVERTER malfunction and lead...

Modbus 485 RTU Converter

M-Box

Version Number: 1

INSTRUCTION MANUAL

EKO INSTRUMENTS CO., LTD MODBUS 485 RTU CONVERTER Instruction Manual V1 Pg. 1

EKO

1. Index

1. Index 1 2. Important User Information 2

2-1. Contact In format ion 2 2-2. Warranty and L iab i l i ty 2 2-3. About Instruct ion Manual 3 2-4. Envi ronment 3 2-5. CE Declarat ion 4

3. Safety Information 5 3-1. WARNING/CAUTION 5 3-2. HIGH VOLTAGE WARNING 5

4. Introduction 6 4-1. Main Funct ions 6 4-2. Package Contents 7

5. Getting Started 8 5-1. Par ts Name 8 5-2. Setup 9

6. USB Controller / Software Error! Bookmark not defined.

6-1. Conf igurat ion 11 6-2. Insta l la t ion 11 6-3. E lectr ica l connect ion 13 6-4. Operat ing 14

7. Connect to peripheral device 17 7-1. E lectr ica l connect ion 17 7-2. Operat ing 18

8. Troubleshooting 20 8-1. Troubleshoot ing 20

9. Specification 21 9-1. Main Uni t 21 9-2. USB Contro l ler and conf igurator sof tware 21 9-2. D imensions 22 9-3. Communicat ion Speci f icat ions 23


EKO

2. Important User Information Thank you for using EKO Products Make sure to read this instruction manual thoroughly and to understand the contents before starting to operate the

instrument. Keep this manual at safe and handy place for whenever it is needed.

For any questions, please contact us at one of the EKO offices given below:

2 -1. Contact In format ion

EKO INSTRUMENTS CO., LTD.

Asia, Oceania Region

www.eko.co.jp [email protected]

EKO INSTRUMENTS Co., Ltd. 1-21-8 Hatagaya, Shibuya-ku Tokyo, 151-0072 Japan

Tel: +81 (3) 3469-6713 Fax: +81 (3) 3469-6719

Europe, Middle East, Africa Region

www.eko-eu.com [email protected]

EKO INSTRUMENTS Europe B.V. Lulofsstraat 55, Unit 32, 2521 AL, Den Haag, The Netherlands

Tel: +31 (0)70 3050117 Fax: +31 (0)70 3840607

North & South America Region

www.eko-usa.com [email protected]

EKO INSTRUMENTS USA Inc. 95 South Market Street, Suite 300 San Jose, CA 95113 USA

Tel: +1 408-977-7751 Fax: +1 408-977-7741

2 -2. Warranty and L iabi l i ty For warranty terms and conditions, contact EKO or your distributor for further details.

EKO guarantees that the product delivered to customer has been verified, checked and tested to ensure that

the product meets the appropriate specifications. The product warranty is valid only if the product has been

installed and used according to the directives provided in this instruction manual.

In case of any manufacturing defect, the product will be repaired or replaced under warranty. However, the

warranty does not apply if:

Ø Any modification or repair was done by any person or organization other than EKO service

personnel.

Ø The damage or defect is caused by not respecting the instructions of use as given on the product

brochure or the instruction manual.


EKO

2 -3. About Instruct ion Manual Copy Rights Reserved by EKO INSTRUMENTS CO., LTD. Making copies of whole or parts of this

document without permission from EKO is prohibited.

This manual was issued: 2015/04/05

Version Number: 1

2 -4. Environment

1. WEEE Directive 2002/96/EC (Waste Electrical and Electronic Equipment)

This product is not subjected to WEEE Directive 2002/96/EC however it should not be mixed with general

household waste. For proper treatment, recovery and recycling, please take this product(s) to designated

collection points.

Disposing of this product correctly will help save valuable resources and prevent any potential negative

effects on human health and the environment, which could otherwise arise from inappropriate waste

handling.

2. RoHS Directive 2002/95/EC EKO Instruments has completed a comprehensive evaluation of its product range to ensure compliance with

RoHS Directive 2002/95/EC regarding maximum concentration values for substances. As a result all

products are manufactured using raw materials that do not contain any of the restricted substances referred

to in the RoHS Directive 2002/95/EC at concentration levels in excess of those permitted under the RoHS

Directive 2002/95/EC, or up to levels allowed in excess of these concentrations by the Annex to the RoHS

Directive 2002/95/EC.


EKO

2-5. CE Declarat ion

DECLARATION OF CONFORMITY

We: EKO INSTRUMENTS CO., LTD

1-21-8 Hatagaya Shibuya-ku,

Tokyo 151-0072 JAPAN

Declare under our sole responsibility that the product:

Product Name: Modbus Signal Converter

To which this declaration relates is in conformity with the following harmonized

standards of other normative documents:

Harmonized standards:

EN 61326-1:2006 Class A (Emission)

EN 61326-1:2006 (Immunity

Test was done in this condition which are signal cable length is under 3m and used the

metal box.

Following the provisions of the directive:

EMC-directive: 89/336/EEC

Amendment to the above directive: 93/68/EEC

Date: Mar. 6, 2015

Position of Authorized Signatory: Deputy General Manager of Quality Assurance Dept.

Name of Authorized Signatory: Shuji Yoshida

Signature of Authorized Signatory:


EKO

3. Safety Information EKO Products are designed and manufactured with consideration for safety; however, please make sure to read and understand this instruction manual thoroughly to be able to operate the instrument safely in the correct manner.

WARNING CAUTION

Attention to user; pay attention to the instructions given on the instruction manual with this sign.

HIGH VOLTAGE WARNING

High voltage is used; pay special attention to instructions given on this instruction manual with this sign to prevent electric leakage and/or electric shocks.

3 -1. WARNING/CAUTION

1. Setup Ø Do not install MODBUS 485 RTU CONVERTER in a place where the MODBUS 485 RTU

CONVERTER may get wet or soaked in water.

Ø Do not install MODBUS 485 RTU CONVERTER in direct sunlight.

Ø Use with fuse around 0.5A connected in series on the power supply cable. Depending on the

power supply connected, large current may flow when the internal malfunction occur, and may lead

to generating heat and fire.

3 -2. HIGH VOLTAGE WARNING

1. Power Supply Ø Always check the voltage and AC/DC type for the specified supply power before connecting the

MODBUS 485 RTU CONVERTER. If wrong type of power supply is connected, it may cause

MODBUS 485 RTU CONVERTER malfunction and lead to accidents.


EKO

4. Introduction The MODBUS 485 RTU converter called "M-Box" is a digital signal conditioner to convert the Voltage output of a

solar radiation sensor, PT-100 or 10kΩ NTC temperature sensor into a MODBUS 485 RTU output. The converter

can be used with all passive EKO radiometers or any other mV sensor to be connected to data loggers or inverters

with a MODBUS 485 RTU input channel. By using the signal conditioner the sensor cable can be easily extended

over long distances without any signal loss or potential electromagnetic interference in noisy industrial

environments. With MODBUS up to 100 different sensors and converter units can be addressed and connected in

parallel.

The mV signal of the solar sensor will be converted to irradiance 0 - 1600 W/m2. In this case the sensitivity factor of

the solar sensor will be set to the converter. With the optional USB controller and EKO Sense software (Multiple

languages) the converter settings can be freely changed. This tool will be needed in case the sensor sensitivity

might need to be changed after a periodical solar sensor re-calibration.

For practical installation, the converter is placed in an IP65 Aluminium box with universal cable glands. It has

robust input/output screw terminals, which can be easily connected to the signal cable that leads to the

measurements system at the installation site. EKO can pre-connect the solar sensor cable to simplify your

process.

4 -1. Main Funct ions

• The converter proportionally converts the solar sensor output voltage (V) into irradiance (W/m2).

• Input (mV, PT-100 (2,3,4W), NTC 10kΩ) / Output irradiance (W/m2) and Temperature

• Up to 100 converters in one system.

• In combination with a solar sensor sensitivity will be pre-set.

• In case of a sensor re-calibration, the converter-setting scan be easily changed with the optional

USB controller and EKO sense software.


EKO

4 -2. Package Contents Check the package contents first; if any missing item or damage is noticed, please contact EKO immediately.

Table 4-1 Package Contents

Standard Items Qty. Remarks

Signal Converter 1 unit Integrated in Aluminium box with cable glands

3 pin header 1 pcs. Converter output

Instruction Manual - Download from EKO website

Optional Items Qty. Remarks

USB/485 cable 1 unit With

9V battery 1 pc.

9V battery cable 1 pc.

Software - Download from EKO website


EKO

5. Getting Started

5 -1. Parts Name Each part name and its main functions are described below.

Table 5-1. Parts Name and Terminal Numbers

Parts Name Terminal Numbers

1 Pyranometer Signal Input (mV, (-)) Terminal 1 1

2 Pyranometer Signal Input (mV, (+)) Terminal 2 2

3 PT-100 / NTC Signal Input Terminal 3 3

4 PT-100 / NTC Signal Input Terminal 4 4

5 Power Supply Input Terminal ( - ) 5

6 Power Supply Input Terminal ( + ) 6

7 Modbus Output Terminal (A) A

8 Grounding Terminal G

9 Modbus Output Terminal (B) B

Figure 5-1. Parts Name

2 1

6 5

3 4

7 8 9


EKO

5-2. Setup

1. Installation

After installation of the solar sensor the Converter can be installed. Open the enclosure of the MODBUS 485

RTU Converter by releasing the 4 top screws. Guide the sensor cable through the cable gland and secure the

cable gland to secure and seal the cable.

Note: In industrial environments to reduce potential EMI effects, the cable between sensor and converter

need to be short (<1m).

Note: Make sure that the power supply is switched off during installation of the sensor output cable.

2. Electrical connection

(Input) Connect the sensor terminals to the input terminal of the converter as shown in the wiring diagram

below. For EKO pyranometers the Red terminal is connected to the (+ terminal 2) and the Blue terminal to the

(- terminal 1) of the converter input. The cable shield must be connected to the aluminium housing by using

the copper screw attached.

Figure 5-2. Wiring Example


(Output) Guide the 5 wires output cable through the cable gland and secure the cable gland to seal the

cable. Connect the two wires to the output terminals of the converter (Voltage to + terminal 6 and return wire

to – terminal 5) and mount the cable shield to the aluminium housing by using the copper screws.

Connect the 3 wires for RS-485 MODBUS communication, respectively (+ = A / - = B and ground wire = G).

The converter can be connected to any device with MODBUS 485 RTU communication protocol.

Mount the cover onto the enclosure and secure it with the 4 screws firmly. The MODBUS 485 RTU converter

is now ready to be used. For proper operation one should apply a supply voltage in the range as specified.

The minimum required supply voltage is 12 VDC, which is needed to feed the internal electronics. In case of

very long cables the voltage loss across the cable must be compensated (24 VDC supply voltage

recommended).

3. Sensor configurations In the figure below different sensor configurations are displayed. The measurement mode is the Acquisition

mode which can be changed using the (EKO Sense configurator software / RS-485 to USB cable / 9V

Battery supply) kit.

Figure 5-3. Measurement Mode & Measuring Instrument Connection Terminals


6. Configuration

6 -1. Conf igurat ion EKO Sense configurator software is a generic configurator tool for all EKO sensor converters, which works in

combination with the EKO SENSE RS-485 USB Controller (Only for MODBUS). It is used to change settings to the

sensor input and output range or check the functionality of the solar sensor and converter.

The software can be downloaded from following EKO website:

(Japanese Website) http://eko.co.jp/XXX /EKO Sense Configurator.exe

(English Website) http://eko-eu.com/XXX/EKO Sense Configurator.exe

6 -2. Insta l la t ion

Install the EKO Sense Configurator software. After installation the software can be used when the EKO Sensor

USB controller is connected to the PC.

If a warning message regarding to the installation authorization, click “Yes” to proceed. Setup window

appears; click “Next” to go to the next step. (Figure 6-1)

Figure 6-1. Software Installation Window


Assign the destination location and click “Next” (Figure 6-2).

Installation process finishes, the installation is complete.

In the menu options Tools/languages different languages can be selected (English, Spanish, Portuguese,

Japanese).

Figure 6-2. Choose Destination Location


6-3. E lectr ica l connect ion and set t ings

In order to change the settings (Baudrate /

address) Connect the MODBUS 485 RTU

CONVERTER through a RS-485 / USB serial

cable with the PC as shown in Figure 6-3.

Make sure the power input terminals and

Modbus output terminal are connected

properly.

Configuration can be done regardless the

conditions of the signal input terminal

connections.

Note: Power can be provided through a 9V battery (See optional items)

2

figure 6-3. Wiring to RS-485 USB Controller

FTDI Converter cable


6 -4. Change set t ings Install the EKO Configurator Software in PC, and start up the software. Select “Modbus RTU” from the Product List.

The window shown in Figure 6-4 appears.

Node Configuration through PC (RS485/USB)

In order to make changes to the MODBUS node, connect the node with the USB/RS485 cable to a PC. The upper

field (1) of the EKO Sense Configurator is used to change the USB/485 Node communication settings.

1) Connect the node to a 9-24VDC power supply (e.g. 9V Battery)

2) Functions to communicate with the Node

a. Set Communication port name (f. Refresh Serial Ports when no COM port was detected).

b. Baudrate (9600 DEFAULT)

c. Parity (None, DEFAULT)

d. Refresh time (1000 ms DEDAULT)

e. Node Index (Adress “1” DEFAULT)

f. Refresh Serial Ports

g. Configuration (To change settings of the node, see lower field and instruction in the next paragraph)

h. Start Communication (Continuously reads the static and dynamic results from the node)

Note: When different settings are made to the Node (e.g. Baudrate 38400), for communication the Baudrate

setting always needs to correspond (38400).

Figure 6-4. Software Window

1

2

1 b a

c

de f

g

h


The lower field (2) of the EKO Sense Configurator is used to change the Node parameters. The Node parameters

can be changed in order to connect to a large Node network where each node has it private address (ID). Some of

the parameters are password (8355) protected (Solar Sensor Temperature Compensation, Solar Sensor

non-linearity , Node ID (Address), baudrate, Parity). All other parameters field, except the measurement result field

can be modified without any password.

00

a) The following Node parameters that can be changed without password. Settings need to be changed one by

one followed by “Send Config”. Note the settings are reflected to MODBUS 485 RTU CONVERTER only when

“Send Config” button is clicked.

Serial number (Corresponds with the solar sensor serial number)

Sensor model (Corresponds with the solar sensor model)

Irrad. Min. (Lowest irradiance reading)

Irrad. Max. (Maximum irradiance reading)

Aqi. Mode (1-5, see chapter 5.2.3)

Sensitivity (µV/W/m2)

Temp. Format (ºC, F, K)

b) Node Measurement results.

The sensor output signal (Millivolts), Calculated Irradiance (Irradiance) and measured temperature are

the dynamic results measured by the node. All others are static values.

2

1

a

b


c) Node parameters which are password protected.

Check “Configuration” to change the Node parameter fields.

Switch the power supply OFF and ON (Note: regulated power supplies have a large electrical

capacity which keep the power output stable for a few seconds!)

Click the Connect” button within 5 seconds after the converter power switch is turned ON.

Enter the password (8355) then click “Send Config” button.

Now the converter configuration (ID, Baudrate, Parity) can be edited. By placing the mouse pointer on each

item, configurable values are shown. The settings are reflected to MODBUS 485 RTU CONVERTER when

“Send Config” button is clicked.

When configuration is completed leave the configuration mode, disable configuration check box, then switch

OFF/ON the converter power.


7. Connect to peripheral device

7 -1. E lectr ica l connect ion The converter can be connected to any

peripheral device communicating through

MODBUS 485 RTU. Up to 100 units can be put

in parallel and can be addressed individually.


7 -2. Operat ing The MODBUS 485 RTU communication data format is determined by the Modbus protocol. The commands

are defined by the universal MODBUS RTU protocols.

Table 7-1 Converter Configuration Contents

Address Items Remarks

0 Serial Number

8 Measuring Instrument Name

13 Minimum Output Solar Irradiance

14 Maximum Output Solar Irradiance

15 Measurement Mode

16 Pyranometer Sensitivity

18 Unit of Temperature

19 Pyranometer Output Value Read Only

21 Solar Irradiance Read Only

23 Temperature Read Only

25 Password 8355 (cannot be changed)

26 Temperature Response Correction Factor See h) footnotes in the section [9-3. Communication

Specification] Table 9-2.

28 Same as above Same as above



34 Linearity Correction Factor See j) footnotes in the section [9-3. Communication

Specification] Table 9-2.





42 Node Number

43 Baud Rate

45 Parity Bit


8. Troubleshooting

8 -1. Troubleshoot ing Check the following items in case of trouble with the instrument. If any questions should remain, contact

EKO for further technical support.

Table 8-1. Troubleshooting

Failure Action

There is no output from the signal

converter.

Check the output cable connection, and make sure there are no

disconnections.

Check to make sure that DC12~24V of power supply voltage is supplied.

Output value from the signal

converter is not appropriate.

Check the input cable connection, and make sure there are no

disconnections.

Signal converter output is

unstable.

Check for any loose wire/cable connections.

Failure Action

No connection possible Check the connection. The converter can only be found during a short

period after connection. Re-insert the USB controller, or reconnect the

terminal block.

No change to made to converter

settings

Settings will only be active after writing the new settings.

Log data function doesn’t display

any measured data

Check the connection


9. Specification

9 -1. Main Uni t

Table 9-1. Main Unit Specification

Characteristics Details

Input Range DC 0 to 100mV

Output Digital (Modbus)

Resolution <5µV

Input Impedance >10MΩ

Temperature Response (-20～50℃) < 0.2%

Accuracy Assured Operating Temperature Range -20 to +50℃

Operating Humidity Range ≦ 95RH% (no condensation)

Response Time 1sec. (99% Output)

Non-Linearity < 0.1% (0-100mV)

Zero Offset <5µV (Output offset value when 0mV is input @ 140Ω)

Power Supply Voltage Conversion Error <0.05% (When supply voltage changed from 12V to 24V)

Power Supply DC 12～24 V ±20%

Power Consumption <0.3W

Dimension φ45 × 27.1mm

Weight 0.03kg

Aluminium box IP 65

Dimensions 80 x 125 x 57 / Cable gland M12 (ø3-6mm)

9 -2. USB Contro l ler and conf igurator sof tware Table 8-2. USB Controller

RS-485 USB Controller / EKO Sense software Windows 7, 8

Weight 0,05 kg

Cable 1m / Terminal block


9 -2. Dimensions

Figure 9-1. Dimensions

Unit in mm

Figure 9-2. Box Dimensions


9 -3. Communicat ion Speci f icat ions Communication data format is determined by the Modbus protocol.

Table 7-2. Communication Specifications

Specification Details

Telecommunication Standard EIA RS-485

Topology Multidrop (Master: 1, Slave: 15, Total: 16)

Communication protocol MODBUS Slave RTU※1

Communication speed (baud rate） 4800, 9600, 19200, 38400, 56000, 57600, 115200 bps

Data Length 8bits

Stop Bit 1bit/2bits※2

Parity Bit none/odd/even

Communication Distance Maximum 1.2km

Error Detection CRC-16

※1: The open protocol for the serial communication which is developed by Modicon.

※2: when there is no parity bit, stop bit will be 2 bits; for other cases, stop bit will be 1 bit.

Table 7-3. Data Format

Start Address Function Data CRC End

T1-T2-T3-T4

A silent

interval

(≧3.5 char)

8bit 8bit n * 8bit 16bit

T1-T2-T3-T4

A silent interval

(≧3.5 char)

Table 7-4. Function Code

Code: decimal Function

03 Read Holding Registers

Modbus Data (RTU)


Table 7-5. Data Contents

Address Data Type Descriptions Notes

0 UINT16※1 Serial Number 1º /2º ASCII Code

1 UINT16 Serial Number 3º/4º ASCII Code






7 UINT16 Serial Number 15º/16 ASCII Code

8 UINT16 Measuring Instrument Model1º/2º ASCII Code





13 UINT16 Irradiance Minimum Output

14 UINT16 Irradiance Maximum Output

15 UINT16 Measurement Mode a)

16 DOUBLE※2 Pyranometer Sensitivity b)

18 UINT16 Unit for Temperature g)

19 DOUBLE Measuring Voltage d)

21 DOUBLE Irradiance e)

23 DOUBLE Measuring Temperature c)

25 UINT16 Password f)

26 DOUBLE Temperature Response Correction Factor1 – a h)

28 DOUBLE Temperature Response Correction Factor2 – b h)

30 DOUBLE Temperature Response Correction Factor3 – c h)

32 DOUBLE Temperature Response Correction Factor4 – d h)

34 DOUBLE Linearity Correction Factor 1 - k1 i)




※1: Integer without 16 bits symbol.

※2: Single precision floating point number


Details of each data contents are as follows:

a) Acquisition mode values:

• 1 : mV + NTC (NTC Temperature value can be used for the sensor temperature compensation)

• 2 : mV + PT100 2Wire (PT100 Temperature value can be used for the sensor temperature

compensation))

• 3 : PT100 2Wires

• 4 : PT100 3Wires

• 5 - PT100 4Wires

b) Sensitivity in uV/W/m2 (See sensor calibration certificate or serial number lable)

c) With 2 decimals (ex: 25.55ºC). In degrees Celsius.

d) This register shows the acquired millivolts with three decimals (ex: 1.254mV)

e) This register shows the calculated irradiance with two decimals according to the transmitter

configuration (ex: 1010.25 W/m2)

f) The value of this register allows the TC and NL coefficients configurations. This register allows

access to the advanced configurations or basic configurations. He acts like a password.

g) 1 – Centigrade (ºC); 2 – Kelvin (K); 3 – Fahrenheit (F)

h) Temperature response correction factor; no correction used in case of following values:

a: 1, b: 0, c: 0, d: 0

Correction factor is as follows:

ETC(E,T) = E / TC1(T)

TC1(T) = a + b x T + c x T^2 + d x T^3

Where:

ETC (E,T): Measuring voltage after correction

E: Measuring voltage

TC1(T): Correction Factor

T: Measuring Temperature

a, b, c, d: Correction Factor


i) Linearity correction factor; no correction used in case of following values:

k1: 0, k2: 0, k3: 0. k4: 0

Correction factor is as follows:

I=(k1+(k2 x ETC(E,T)+(k3 x ETC(E,T)^2)+(k4 x ETC(E,T)^3))/S

Where:

I: Irradiance after correction

ETC(E,T): Measuring voltage after correction, mentioned in h) above.

S: Pyranometer Sensitivity

k1, k2, k3, k4: Correction Factor

Example: K1 is a coefficient equivalent to the input offset (µV)

APPENDIX

A-1. Opt ional I tems 1. RS485/USB Communication Cable RS-485/USB Converter for converter setting and connection cable for connecting between the converter and

PC.

Table A-1. Package Contents

Items Qty Remarks

RS-485/USB Converter kit 1pc Cable Length: 1m / 9V battery / Battery connector / Software

1) Specifications

Table A-2.Specifications of Cable for Converter Setting

Items Details

Applicable OS Windows XP, Vista, 7, 8(32bit, 64bit)

Interface USB1.1

Weight 0.15 kg

Number of Pins 3

Cable Length 1m

2) Wiring

Connect the A, B, and G terminal of connection cable to A, B, and G terminals on the Converter.

Connect the other end to terminal numbers 1, 2, and G on RS-485/USB Converter. Then connect the

USB cable of the RS-485/USB Converter to PC.


2. Converter box

Multiple Converters, each wit a unique address can be connected in parallel and work trough one communication

line. Please contact EKO for more information about pre-configured converter boxes.

Figure A-2. 2 units of Signal Converter in Converter Box2: Power Supply Line and Signal Line Wiring


Japan: www.eko.co.jp

Europe: www.eko-eu.com

USA: www.eko-usa.com

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MODBUS 485 RTU Manual 150401 KH - EKO Instruments · MODBUS 485 RTU CONVERTER malfunction and lead...

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