(I)GW11XX Modbus User Manual
3onedata proprietary and confidential 36
Copyright © Shenzhen 3onedata Technology Co., Ltd.
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1
TCP master device sends request to gateway;
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2
Gateway forwarding request to RTU slave device;
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3
RTU slave device returns a response;
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4
The gateway sends back the response.
The parameters of the TCP master are as follows:
Slave ID: 2
TCP port number: 502
The parameters of the RTU slave are as follows:
Communication port: COM 2
Baud rate: 115200
Parity bit: None
Data bit: 8
Stop bit: 1
Operation steps
The screenshot reference model for this manual is GW1108-8D (3IN1) Modbus. Other
types of products in addition to supporting the serial type (RS-232, RS-422, RS-485), and
the number of network ports and the number of serial ports are different, the interftions are
the same.
Connect the COM serial port of the computer and the COM2 serial port of the Modbus
Step 1
gateway using a cable or a converter.
Configure the IP address of the Modbus gateway.
Step 2
