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Fig. 83 Modbus emulator settings(serial master and serial slave)
6.5. Modbus poll with serial heartbeat packet
When the M100 is Modbus RTU Master, the serial device work in Modbus RTU Slave mode, the ModbusTCP function must be disabled.
M100 works in TCP server mode, it supports up to 16 TCP connections.
Fig. 84 Modbus RTU master Settings
Fig. 85 Serial heartbeat packet as modbus command