AEG 239 D- Manuals

© 2007 GE Multilin Incorporated. All rights reserved. GE Multilin 239 Motor Protection Relay Communications Guide for revision 2.7x. 239 Motor Protection Relay, is a registered trademark of GE Multilin Inc. The contents of this manual are the property of GE Multilin Inc. This documentation is furnis...

Page 3 - Table of Contents

TABLE OF CONTENTS 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE TOC–I Table of Contents COMMUNICATIONS ..........................................................................................................CG-1 M ODBUS P ROTOCOL ...................................................................

Page 5 - 39 Motor Protection Relay; GE Consumer & Industrial; Multilin; resistor in series with a 1 nF ceramic capacitor when used

239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE CG–1 239 Motor Protection Relay Communications Guide GE Consumer & Industrial Multilin TRIP ALARM AUXILIARY SERVICE PICKUP COMMUNICATE R ESET STO R E A CT UA L VA L U E M ESS AG E SET P O I NT 239 Motor Protection Relay CAUSE OF LAST TRIP: MECHAN...

Page 6 - Manual

CG–2 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE COMMUNICATIONS GUIDE is important in RS485 communications. Each '+' terminal of every device must be connected together for the system to operate. See Section 2.1.3 in the 239 Instruction Manual for details on correct serial port wiring. CG.1.3 ...

Page 7 - CG.2 Data Packet Format; SLAVE ADDRESS; : This is the second byte of every transmission. Modbus defines; DATA; : This is a two byte error checking code.

COMMUNICATIONS GUIDE 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE CG–3 CG.2 Data Packet Format A complete request/response sequence consists of the following bytes (transmitted as separate data frames): Master Request Transmission: SLAVE ADDRESS -1 byteFUNCTION CODE -1 byteDATA variable number ...

Page 10 - CG.3 239 Supported Modbus Functions; The following functions are supported by the 239:; MESSAGE FORMAT AND EXAMPLE; Address Data

CG–6 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE COMMUNICATIONS GUIDE CG.3 239 Supported Modbus Functions The following functions are supported by the 239: • 03 - Read Setpoints and Actual Values • 04 - Read Setpoints and Actual Values • 05 - Execute Operation • 06 - Store Single Setpoint • 07...

Page 12 - Modbus Implementation:; 39 General Status Byte:

CG–8 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE COMMUNICATIONS GUIDE This command allows the master to store a single setpoint into the memory of a 239. The slave response to this function code is to echo the entire master transmission. a) MESSAGE FORMAT AND EXAMPLE Request slave 11 to store ...

Page 13 - Request status from slave 11.

COMMUNICATIONS GUIDE 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE CG–9 MESSAGE FORMAT AND EXAMPLE Request status from slave 11. Master Transmission Bytes Example (hex) SLAVE ADDRESS - 1 byte 11 message for slave 11 FUNCTION CODE - 1 byte 07 read device status CRC - 2 bytes 8F BB CRC calculated ...

Page 14 - Loopback test from slave 11.

CG–10 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE COMMUNICATIONS GUIDE MESSAGE FORMAT AND EXAMPLE Loopback test from slave 11. Master Transmission Bytes Example (hex) SLAVE ADDRESS - 1 byte 11 message for slave 11 FUNCTION CODE - 1 byte 08 loopback test DIAG CODE - 2 bytes 00 00 must be 00 00 ...

Page 17 - The slave response to an error (other than CRC error) will be:

COMMUNICATIONS GUIDE 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE CG–13 CG.5 Error Responses When a 239 detects an error other than a CRC error, a response will be sent to the master. The MSbit of the FUNCTION CODE byte will be set to 1 (i.e. the function code sent from the slave will be equal ...

Page 18 - CG.6 Memory Map Information

CG–14 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE COMMUNICATIONS GUIDE CG.6 Memory Map Information The data stored in the 239 is grouped as Setpoints and Actual Values. Setpoints can be read and written by a master computer. Actual Values can be read only. All Setpoints and Actual Values are s...

Page 40 - MEMORY MAP TABLE NOTES; CODE

CG–36 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE COMMUNICATIONS GUIDE MEMORY MAP TABLE NOTES Notes: * = Minimum Setpoint value represents “OFF” ** = Maximum Setpoint value and FFFFH represent “OFF” *** = 1/Phase Current Scale Factor x A **** = 32767 represents “NO RTD” † = Any valid Actual Va...

Page 55 - Group

COMMUNICATIONS GUIDE 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE CG–51 2 = 3 rd Group --- 3 = 4 th Group --- F114 Ground Current Scale Factor FFFF 10 = RESIDUAL or X:5 GROUND SENSING --- 100 = OFF or 50:0.025 GROUND SENSING --- Table CG–2: Data Formats (Sheet 15 of 15) CODE DESCRIPTION BITMASK

Page 57 - Index

INDEX 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE CG-INDEX–1 Index Index A B C COMMUNICATIONS data format ................................................................................................... CG-2 electrical interface .................................................................

Page 58 - TIMING

CG-INDEX–2 239 MOTOR PROTECTION RELAY – COMMUNICATIONS GUIDE INDEX function code 08 – loopback test .................................................................. CG-9 function code 16 – performing commands .................................................. CG-12 function code 16 – store multipl...