GE - 1601-0149-A2

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Contents

GE Industrial Systems 489 Generator Management Relay COMMUNICATIONS GUIDE Software Revision 3 00 GE Publication Code GEK 106495A GE Multilin Part Number 1601 0149 A2 Copyright 2004 GE Multilin GE Multilin 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 201 2098 Internet http www GEindustrial com multilin GE Multilin s Quality Management System is registered to IS09001 2000 QMI 005094 UL A3775 489 Communications Guide Table of Contents MODBUS PROTOCOL Electrical Interface 1 Modbus RTU Description 1 Data Frame Format and Data Rate 1 Data Packet Format 2 CRC 16 Algorithm 3 Timing 3 MODBUS FUNCTIONS Supported Functions 3 Function Codes 03 04 Read Setpoints Actual Values 4 F ...