User's Manual

INDUSTRIAL 4G LTE CELLULAR ROUTER - UM V1.1.8
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Modbus Topology
There is an example for Modbus Topology that you can configure Modbus gateway to observe
the temperature, voltage and current from Modbus meter on PC-A.
The settings of Modbus is shown as below. The mode is Enable. The default port is 502.
Please confirm the interface of COM Port 3 that the mode is Disable.
Next, you can connect a meter of DC voltage and current for supporting Modbus protocol with
RS-485 serial to COM Port 3 from the cellular router and know the information about temperature,
voltage and current.