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6.3. Serial master with serial slaves
When the HMI is Modbus RTU Master, all M100 must enable or disable ModbusTCP function at the same time, the remote device
must work in Modbus RTU Slave mode. The M100 supports up to 16 simultaneous TCP connections.
Fig. 75 Serial master with multiple serial slaves
If there are more than one serial masters in RS485 network, users should select modbus poll function and configure response timeout
in Fig.76. please refer to section 7.5 for bus collision detection.
Fig. 76 Modbus RTU master settings
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