M350 Series User Manual 173
After above setup, you can use the Modbus software which supported the Modbus RTU over TCP
to control the Modbus sensor/device.
16.5 Modbus Gateway(RS-485)
The Modbus gateway feature of router could convert the Modbus TCP to the Modbus RTU protocol
and send it to the connected RS-485 device. This feature depends on the COM1 setting, you need
to configure the serial setting in the System -> COM ports web UI and setup this feature in the
System -> Modbus web UI.
After above setup, the Modbus software can use the Modbus TCP protocol to control the Modbus