THOMSON MEC 310 - APLLICATION NOTES EXTERNAL I-O... Manuel utilisateur

9087A – 198

Street, Langley, BC Canada V1M 3B1 Telephone (604) 888-0110

Fax (604) 888-3381 E-Mail: info@thomsontechnology.com www.thomsontechnology.com

MEC 310

GENSET CONTROLLER

Option M – Modbus Communications

r.0442C

PM080 Rev 0 07/06/18

MEC 310 GENSET CONTROLLER WITH MODBUS

PM080 Rev 0 07/06/18 Thomson Technology

TABLE OF CONTENTS

1. WARNINGS AND LEGAL INFORMATION ................................................................... 1

EGAL INFORMATION AND RESPONSIBILITY

............................................................................. 1

LECTROSTATIC DISCHARGE AWARENESS

............................................................................. 1

AFETY ISSUES

................................................................................................................... 1

EFINITIONS

....................................................................................................................... 1

2. DESCRIPTION OF OPTION ......................................................................................... 2

ANSI

NUMBERS

.................................................................................................................. 2

PTION

M - M

ODBUS

.......................................................................................................... 2

ERMINAL DESCRIPTION

....................................................................................................... 2

ARDWARE SETTINGS

......................................................................................................... 2

IRING

.............................................................................................................................. 2

3. PARAMETER LIST ....................................................................................................... 3

4. DATA TABLES.............................................................................................................. 4

ONFIGURABLE AREA

(

READ ONLY

) (

FUNCTION CODE

) ..................................................... 4

EASUREMENT TABLE

(

READ ONLY

) (

FUNCTION CODE

) .................................................... 9

LARM AND STATUS TABLE

(

READ ONLY

) (

FUNCTION CODE

)............................................ 12

ONTROL REGISTER TABLE READ

(03

WRITE

(10

) ............................................................ 17

OMMAND FLAGS TABLE

(

WRITE ONLY

) (

FUNCTION CODE

).............................................. 18

TATUS FLAGS TABLE

(

READ ONLY

) (

FUNCTION CODE

)................................................... 19

PM080 Rev 0 07/06/18 1 Thomson Technology

1. Warnings and legal information

Legal information and responsibility

Thomson Technology takes no responsibility for installation or operation of the generator set. If there is any

doubt about how to install or operate the generator set controlled by the unit, the company responsible for the

installation or the operation of the set must be contacted.

Electrostatic discharge awareness

Sufficient care must be taken to protect the terminals against static discharges during the installation. Once the

unit is installed and connected, these precautions are no longer necessary.

Safety issues

Installing the unit implies work with dangerous currents and voltages. Therefore, the installation should only be

carried out by authorised personnel who understand the risks involved in working with live electrical equipment.

Definitions

Throughout this document a number of notes and warnings will be presented. To ensure that these are noticed,

they will be highlighted in order to separate them from the general text.

Notes

Warning

The notes provide general information which will be helpful for the reader to

bear in mind.

The warnings indicate a potentially dangerous situation which could result in

death, personal injury or damaged equipment, if certain guidelines are no

followed.

Be aware of the hazardous live currents and voltages. Do not touch any AC

measurement inputs as this could lead to injury or death.

The units are not to be opened by unauthorised personnel. If opened anyway, the

warranty will be lost.

PM080 Rev 0 07/06/18 2 Thomson Technology

2. Description of option

ANSI numbers

Function ANSI no.

RS485 modbus communication -

Option M - Modbus

The Modbus option is a hardware and software option.

Terminal description

Term. Function Description

49 DATA - (Tx)

50 GND

51 DATA + (Rx)

52 Not used

Modbus RTU, RS485

Hardware settings

These are the MEC 310 RS485 hardware settings:

a. 9600 or 19200 bps

b. 8 data bits

c. None parity

d. 1 stop bit

Wiring

MEC310

Modbus Slave

GND

Data

GND

Data

MEC310

Modbus Slave

MEC310

Modbus Slave

PLC

Modbus Master

Cable: Belden 3105A or equivalent. 22 AWG (0.6 mm

) twisted pair,

shielded, <40 m



/m, min. 95% shield coverage.

PM080 Rev 0 07/06/18 3 Thomson Technology

3. Parameter list

7510 Ext. communication

No. Setting Min. setting Max. setting

Factory

setting

7511 Ext. communication ID 1 247 1

7512 Ext. communication Baud rate 9600 Baud 19200 Baud 9600 Baud

7513 Ext. communication Mode RTU ASCII RTU

The mode ASCII is used for modem communication (ASCII: 7 data bit. RTU: 8

data bit).

PM080 Rev 0 07/06/18 4 Thomson Technology

4. Data tables

Example:

Read measured Supply Voltage (U

SUPPLY

1. Determine required parameters:

MEC 310 ID (default) = 01h

Function Code (Read) = 04h

Offset Address (from table below) = 34d -> 22h

Request length of 1 word = 01h

2. Create and send Modbus command; receive response:

Tx: 01h 04h 00h 22h 00h 01h 91h C0h

Rx: 01h 04h 02h 00h EDh 79h 7Dh

Where the last two words of each message are automatically generated CRC codes

3. Interpret Data:

Read 00 ED h = 237d [V/10] = 23.7 V

Configurable area (read only) (function code 04h)

Address Content Type

0 U

L1-L2