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TCP debugging assistant simulates UDP client, Modbus Slave simulates serial port
device, and it connects to S1E1 serial port through computer serial port USB to 485
converter.
Open TCP Debugging Assistant, select UDP, and set the remote host IP address:
192.168.1.254, remote port: 502, and local port: 6000. Click to enable UDP.
Open Modbus Slave (simulate serial port device), click Connection or press the F3
shortcut key, set the correct serial port number and communication parameters in the
pop-up window, and click OK.