FMC2000 User’s Guide
32 Appendix G: ModBus Protocol For
The FMC2000
32.1 Overview
This document describes the ModBus protocol for the
FMC2000 MeshGuard controller. It covers third-party
MeshGuard integration through the FMC2000 ModBus.
32.2 Communications Settings
Communication mode:
There are two modes can be selected on FMC2000 Modbus
menu:
• Modbus RTU/ASCII on RS485
• Modbus RTU over TCP/IP
Mode 1: Communication Parameters for RS485 Interface
FMC2000: Slave
Baud Rate: 4800, 9600, 19200 (default)
Client ID: 1~246 (0x01~0xF6)
Data Format:
Data bits: 8
Check bits: none
Stop bits: 1
Mode 2: Modbus RTU over TCP/IP
FMC2000 supports Modbus RTU over TCP on its Ethernet
port. It is not the standard Modbus TCP.
The FMC2000 controller is a client to connect to a server (the
default listening port is 9724, configurable).
Once connected, the server needs to send the request
command(s) to FMC2000 controller to get the monitor
101
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