PF HART Multiplexer Support on PRM

7/13/2019 PF HART Multiplexer Support on PRM

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Yokogawa Electric Corporation SBDB080046

1

PRM Integration Guide with

Pepperl+Fuchs HiDMUX2700 HART Multiplexer

This manual explains how to connect the HiDMUX2700 HART Multiplexer and configure

Yokogawas Plant Resource Manager (PRM) software.

Notes (Yokogawa):

This manual simply explains certain functional details of PRM and makes no claims as to its

suitability for a particular purpose.

No part of this manual may be transferred or reproduced without prior written consent from

Yokogawa.

Yokogawa assumes no responsibility for any direct or indirect loss or damage that arises from

the use of this manual due to circumstances that cannot be predicted in advance.

Notes (Pepperl+Fuchs):

This manual has been prepared for informational purposes only.

While Pepperl+Fuchs has made every effort to ensure the correctness and accuracy of this

documents contents, it provides neither warranties nor guarantees, express or implied,

regarding the Pepperl+Fuchs products described herein or their use.

Pepperl+Fuchs reserves the right to make modifications to the designs and specifications of the

products described herein at any time and without advance notice.


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Contents

1 Introduction .............................................................................................3

1.1 Field Connections ............................................................. ............................................................. 6

1.2 Control Connections...................................................................................................................... 6

1.3 HART Communicator................................................................................................................... 6

1.4 Grounding...................................................................................................................................... 7

2 Operation .................................................................................................8

2.1 Initial Setup.................................................................................................................................... 8

2.1.1 HiDMUX2700 Settings............................................................................................................... 8

2.1.2 RS-232/RS-485 Converter ................................................................... ....................................... 9

2.2 Start-up Sequence........................................................................................................................ 10

2.3 Controls........................................................................................................................................ 10

2.4 Indicators ............................................................... .................................................................. .... 10

2.5 Modes of Operation......................................................................................................................11

3 Principles of Operation.........................................................................12

3.1 HART Filters ............................................................................................................................... 12

3.2 Multiple Multiplexers ................................................................................................................. 13

4

Troubleshooting....................................................................................14

4.1 HiDMUX2700 ................................................................... ........................................................... 14

5 Maintenance .......................................................................................... 16

6 P+F HART Multiplexer Support on PRM.............................................. 17

7 Parts List................................................................................................23

8 Glossary................................................................................................. 24


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1 Introduction

This manual outlines the requirements for connecting the analog outputs to the

HISHPSM/32/TB-02 HART termination board. Please note that this board is available in many

different configurations, including with or without HART filters, fuses, and 200 ohm resistors.

The following text and connection diagrams refer to a connection with a DVC6000 Smart Valve,

when partial stroke testing is requested or required.

Partial stroke testing is as an alternative to periodic full stroke tests of critical ESD valves, which

typically means a disruptive process shutdown. As part of its HART diagnostic data, the

DVC6000 sends digital information on the HART loop when a partial valve stroke test is in

progress, and when the ESD valve is stuck.

This partial stroke test may be accomplished using the Pepperl+Fuchs HART termination board

(HISHPSM/32/TB-02) shown in Figure 1.

Figure 1

This HISHPSM/32/TB-02 termination board must be connected in a series between your field

devices and the control system, as shown in Figure 2.


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Figure 2

The system in Figure 2 consists of the following:

1) One of the following HPSM/32/TB-02-200R 32 channel termination boards:

HPSM/32/TB-02, 32 channels without HART filters

HPSM/32/TB-02/FUSE, 32 channels, with fuses

HPSM/32/TB-02/HF16, 16 channels with HART filters / 16 without

HPSM/32/TB-02/HF16/FUSE, 16 channels with HART filters & fuses

HPSM/32/TB-02/HF32, 32 channels with HART filters

HPSM/32/TB-02-200R, 32 channels with 200 ohm resistor in line

2) HiDMUX2700

3) RS-485/RS-232 Converter

4) Software (PRM)

In order to perform this partial stroke test, the analog output must be connected correctly to the


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HISHPSM/32/TB-02 termination board. Please refer to Figure 3 for the proper connection of the

HART analog output.

Figure 3

This connection will allow proper HART communication to the digital output and makes it

possible to perform the requested partial stroke test.

The following pages provide brief instructions on how to set up the HiDMUX2700, RS-232/RS-

485, and diagnostics. These pages are excerpted from the manual for the HPSM/32/TB-02

termination board.

G

A

B

G

A

B

RG

G

A

B

G

A

B

RG

G

A

B

G

A

B

RG

Y G R B

DATA

+

DATA

--

+24Vdc

GND

RS-485 OUT

100 ohm termination

resistor on the last MUX

Keithley M1000RS-232 / RS-485 Converter

SHIELD

RS1 T

B2

SHD+

RS2

B

A

G

B

A

G

-

SHD+

-

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

9

10

RS-485

24V

InputA

24V

InputB

2700MUX

SHIELDS

HD+--

RS-485

SHIELD

RS1 T

B2

SHD+

RS2

B

A

G

B

A

G

-

SHD+

-

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

9

10

RS-485

24V

InputA

24V

InputB

2700MUX

SHIELDS

HD+--

RS-485

SHIELD

RS1 T

B2

SHD+

RS2

B

A

G

B

A

G

-

SHD+

-

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

9

10

RS-485

24VInputA

24VInputB

2700MUX

SHIELDS

HD+--

RS-485

Figure 4 RS-485 Wiring


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1.1 Field Connections

Field wiring can have many variations, depending on the type of field device. The wiring will

either be in parallel or series.

1.2 Control Connections

If your unit is wired in parallel, no connections should be made to the control side

terminals.

1.3 HART Communicator

In HART communications without multi-drop mode, there is one slave (field device) and up to

two masters (e.g. multiplexer, HART Communicator, I/O module). The HART Communicator can

be connected to the field side terminals as a secondary master. In your software settings, the

HiDMUX2700 must be the primary master in order to use the HART Communicator.

There cannot be more than two masters. If three or more masters are connected, a primary/

secondary conflict will occur and communications will cease with all devices on that loop. When

the HiDMUX2700 is used with a HART compatible I/O system, the HiDMUX2700 must be

configured as the secondary master. Otherwise, configure the HiDMUX2700 as the primary

master. The handheld terminal (HHT) is a secondary master by default, and can be connected

to the loop when no other device on that loop is configured as a secondary master.

WARNING!Do not connect the HART Communicator to any intrinsically safe (IS) field wiring

unless the terminal is approved as intrinsically safe and suitable for the actual hazardous

location classification of the specific hazardous location. Also consider the HART Communicator

safety parameters and equivalent capacitance and inductance before concluding that you can

safely connect it to the IS side of the circuit.


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1.4 Grounding

The HPSM is divided into two galvanically isolated sections, each with its own shield terminal:

SHD1 and SHD2. The field side terminals are connected to SHD1, which provides a single point

for the proper grounding of the field wiring shields. The control side shield terminals and the

power supply shield terminals are connected to SHD2. SHD2 is only used for certain

applications.


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2 Operation

2.1 Initial Setup

The default settings for each HiDMUX2700 are as follows:

Address = 1

Baud rate = 19200

2.1.1 HiDMUX2700 Settings

The User Switches buffer has eight inputs from a low profile DIP switch that can be accessed

under the transparent plastic cover.The functions of the switches are as follows:

Switch 8 (T) Reserved for TEST purposes

Switch 7 (R1) BAUD RATE 1

Switch 6 (R0) BAUD RATE 0

Switch 5 (B4) ADDRESS 4





Further information is given on the front and side labels (Figure 5). The side label gives the

correct setting for each DIP switch combination.

2.1.1.1 Address

The address of the HiDMUX2700 is determined by the DIP switches as noted below (Figure 5).

Each MUX on the same RS-485 network must have a different address, but they do not have to

be sequential and do not necessarily need to start at address 1. Possible addresses are 1-31.

Address 0 is invalid and cannot be used. Note that the network properties of the software setup

are for multi-dropping. This is when multiple HiDMUX2700 multiplexers are on the same


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network, not the same I/O loop (also referred to as multi-dropping). Multi-dropping should be

enabled in the network setup.

2.1.1.2 Baud Rate

Table 1 RS-485 Baud RateSW 6 SW 7

9600 ON OFF

19200 OFF OFF

The baud rate of the HiDMUX2700 must match the baud rate of the PCs COM port and the RS-

232/RS-485 converter. All three units must use the same baud rate to function properly. The

baud rate can be either 9600 or 19200 and is selected as shown in Table 1.

Figure 5

2.1.2 RS-232/RS-485 Converter

An RS-232 to RS-485 converter must be placed between the HIS and the computers RS-232

port. Pepperl+Fuchs recommends the Phoenix Contact PSM-ME-232/485 for non-CE

applications.

If the system is set up with only one RS-232 to RS-485 converter, then the RS-485 network


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components must be less than 1,200 meters (4,000 feet) apart. For distances over 1,200 meters,

an RS-232 to RS-485 repeater can be used. The repeater amplifies the original RS-485 signal

when it is transmitted over long distances.

2.2 Start-up Sequence

The proper start-up sequence for the HiDMUX2700 is as follows:

1. Make all signal connections to the HPSM.

2. Connect RS-485 wires and adjust network settings.

3. Apply field power or source 4-20 mA.

4. Turn on power to or plug in the HiDMUX2700.

5. After the HiDMUX2700 has completed the start-up sequence, then start the AMS.

2.3 Controls

The only controls on the Pepperl+Fuchs equipment are the DIP switches noted above. All other

settings are a function of the software. Please refer to your software instruction manual forfurther details.

2.4 Indicators

Three LEDs on the front of the HiDMUX2700 indicate the status. Normal operation is as follows:

PWR ON: This green LED is lit when power is applied to the HiDMUX2700. Power is

automatically applied when the HiDMUX2700 is plugged into the HPSM.

HART TX: Indicates that the HiDMUX2700 has established a communications link with field

devices.

FAULT: Should not be lit during normal operation.

A single LED on the termination board lights when 24 V DC power is applied.


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2.5 Modes of Operation

SCAN MODE: Command to the HiDMUX2700 from the software telling the HiDMUX2700 to

periodically scan each device automatically. Otherwise, the HiDMUX2700 will only

communicate with a device when told to do so by the software.

BURST MODE: When a field device is in burst mode, it automatically sends information

without being commanded to do so. This is a break from the master-slave nature of HART

communication, but the HiDMUX2700 will support it when burst mode is selected in the

software.


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3 Principles of Operation

Referring to Figure 6, the heart of the HiDMUX2700 is the microprocessor. One serial port

together with the HART modem generates the physical layer of the HART protocol, while the

channel select circuit together with the channel multiplexer links one specific channel (device) at

a time. An RS-485 circuit completes the gateway between the maintenance workstation and the

devices. The user switches circuit provides information required by the HiDMUX2700 for

initialization and configuration. Specifically, the baud rate for communications to the

maintenance workstation and the HiDMUX2700 address are selected.

Figure 6

3.1 HART Filters

HART filters may be necessary with certain systems for the following reasons:

To increase low output impedance of DCS so the HART signals have sufficient amplitude

To remove fast transients from step changes in DCS output

To prevent disruption of DCS circuitry by HART signals

Note that when a HART filter is used, the HART signal will not be available to any monitoring

equipment on the control side of the HPSM, including the DCS or HHT. Pepperl+Fuchs

PowerSupplySection

RS-485Interface

OptoIsol.

CPU

MUX

A

HARTModem

+24V

GND

RS-485 Line

HART Channel 1

HART Channel 32

+

+

-

+

-

2700 MUX Block Diagram


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recommends HART filters for any HART output signal (valves). DCS systems from Bailey,

Fischer and Porter, Honeywell, Foxboro, and Fisher-Rosemount may require HART filters.

Consult with the valve or I/P supplier to know if filters are required for a specific control system

or field device.

HPSM/32/TB-02/HF16: Channels 1-16 have HART filters. Channels 17-32 do not.

HPSM/32/TB-02/HF32: Channels 1-32 have HART filters.

CAUTION: HART filters are only for use with output signals. Transmitters will not function when

connected to a channel with a HART filter

3.2 Multiple Multiplexers

Up to 31 HiDMUX2700 multiplexers can be connected on a single RS-485 network to support

992 devices. Multiple HiDMUX2700 units are connected in daisy-chain form, and redundant

terminals are provided for this on each board.


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4 Troubleshooting

Due to the modular nature of the HIS system, a communication failure may occur anywhere in

the data transfer link from the software to the field device. In order to identify where the loss of

communication has occurred, it is important to understand which components are working

correctly. Often, some simple checks will save hours of troubleshooting. Some of the most

common mistakes are: improper wiring connections, baud rate mismatches, improper network

settings, and improper addressing of the HiDMUX2700.

4.1 HiDMUX2700

The LEDs at the front of the HiDMUX2700 provide a convenient indication to the user that the

HiDMUX2700 is operational. During normal operation, the PWR ON LED should be lit. The

FAULT LED should be off. The HART TX LED may either be off or flashing steadily.

When power to the HiDMUX2700 is cycled or a Reset command is issued, all the LEDs will

flash once. Then, the PWR ON LED will come on, and for the next 60 to 120 seconds the HARTTX LED will repeat a sequence of three flashes and a pause. During this period, the

HiDMUX2700 is scanning each of the 32 channels. When it is finished, the HART TX LED will

either flash steadily or turn off altogether. If all of the above occur, the HiDMUX2700 is operating

properly.

In addition, the TEST setting on the option switches can be used to verify that the module is

functioning normally. Follow the procedure below to use this feature:

1. With the power off, disconnect the module from the RS-485 network and set switch 8 to

the TEST position (ON).

2. Switch the power on. The LEDs should light for about 1 second each in sequence (red,

yellow, green).

3. If the LEDs do not flash, there is a fault with the module and it should be returned for

replacement.

4. To return to normal operation, switch off power to the HiDMUX2700 and set the TEST

switch to the OFF position. Ensure that the correct baud rate is selected and that an

RS-485 address is set. Then, re-apply power.


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If you suspect the HiDMUX2700 is not functioning properly, refer to Table 2 below.

Table 2 HiDMUX2700 LED Indications

Symptom Cause Solution

Lights flash sequentially TEST switch is ON Switch off the powerSet TEST switch to OFFRestart the system

No LEDs lit Power fail or fuse open Check the 24 V DC LED andfuse

Only yellow LED lit Scanning is disabled.If scanning is enabled, then noHART devices were detected bythe HiDMUX2700

Check wiring continuity

Red LED lit Self-test fault Contact Pepperl+Fuchs forfurther instructions


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5 Maintenance

Under normal operating conditions, the Pepperl+Fuchs apparatus does not require maintenance.

It is designed to operate trouble-free and with high stability for long periods.

WARNING!Any repair made by unauthorized personnel may completely invalidate the safety

characteristics of the unit and could void all warranties. Repair not made by Pepperl+Fuchs is

fully at user's risk and responsibility. In addition, the warranty terms of the unit will be null and

void to all effect.


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6 P+F HART Multiplexer Support on PRM

The P+F HART Multiplexer uses an RS-485 serial communications link. As the PRM Field

Communication Server has an RS-232 COM port, an RS-232/RS-485 converter is used.

Figure 7

The baud rate for serial communications between the PRM Field Communication Server and

the HART Multiplexer is 19200. The baud rate setting for both the computer COM port and the

multiplexer should be 19200.


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Figure 8

After making the settings for the PRM Field Communication Server COM port, configure the

device path for PRM. As shown in the following two illustrations, create a project under LOCAL

and select ELCON2700 for the IOM type.

Figure 9


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Figure 10

Also configure the HiDMUX2700 for master configuration as per the DIP switch setting and

select the COM port that is connected to the RS-232 9 pin cable. Select Preamble 10 for HART

device communication.

Figure 11


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Figure 12

Click Apply in the Device Path Configuration Tool and then click Restart Field Comm. Service

to restart the PRM Field Communication Server.

Log on to the PRM client and go to network view. Select the HART network and go to Register

Read Device Path. Click Yes if a message window pops up to inform that this operation

could take a long time.


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Figure 13

After registering the device path for the project and the HART Multiplexer in the HART network

view, open Windows Explorer and select PrmHartMuxMaintTool.exe in the PRM/Tool folder.


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Figure 14

Enter the name of the PRM Field Communication Server and select Get Multiplexer Info. to

display the COM port, Master Multiplexer, and Slave Multiplexer data. When a communications

link is established between the PRM Field Communication Server and the HART Multiplexer, the

lights on the multiplexer will start flashing. Click Get Device List to display all the HART

devices that are connected to the Slave Multiplexer. This test will confirm that the PRM Field

Communication Server is communicating with the HART Multiplexer system and the HART

devices.


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7 Parts List

Table 3 lists the replacement parts for the HPSM. No HiDMUX2700 parts can be replaced in the

field.

Table 3 Replaceable Parts

PartPartPartPart Number DescrDescrDescrDescriptioniptioniptioniption

501300 Supply ID label

502401 Terminal blocks MVSTBW 2.5/3-ST-5.08

508100 Fuse 5x20 time-lag, 125 mA FS1, FS2

508200 Vertical fuse holder for 125 mA FS1, FS2

508300 50 mA TR5 Microfuse L1-32


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8 Glossary

DCS: Distributed control system

FSK: Frequency shift keying

HART : Highway addressable remote transducer

HHT: Hand held terminal

IS: Intrinsic safety

MW: Maintenance workstation

PC: Personal computer

PLC: Programmable logic controller

TB: Termination board

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