4
3.4.2.5.Double-click "COM2" , or right-click "COM2".
And click "Serial Properties" to bring up the "Configure serial" window. Set up the
communication parameters. And it sets the serial port working mode as slave mode, then
click the "OK" to save and return. (For this example, it selects COM2).
The meaning of each parameter is as follows
：
Operating mode
：
It is used to set up gateway as master station or slave station in the network.
Default is set as master mode.
In this example, it is set as slave mode.
Modbus protocol type
：
It is used to set up the gateway protocol type of the network between the communication of
the serial port and other connected devices.
It can choose either Modbus-RTU or Modbus-ASCII. Please set this parameter to be
consistent with the device to which the serial port is connected.
