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Port No.: It refers to Port of PLC, COM0 refers to Port 0 (RS232), COM1 refers to Port 1
(RS232), COM2 refers to Port 2 (RS485) or Port 2-RS232 (RS485) or Port 2-RS485 (RS485),
COM3 refers to Port 3 (left extended ED port), COM4 refers to Port 4 (upper extended BD
port 1), COM5 refers to Port 5 (upper extended BD port 2).
The baud rate, data bit, parity bit, stop bit should be same to the communication device.
Station number: if the PLC is master, the station no. is defaulted 1, if the PLC is slave, it
needs to set different station no.
Two communication modes: RTU, ASCII.
Delay before sending: Waiting time before PLC sends data. In the original XC series PLC, if
the master PLC communicates with the slave PLC, the master PLC sends data to the slave
PLC. If the master PLC sends data to the slave PLC after the first time, and the slave PLC has
not yet had time to receive the data, then the master PLC sends data to the slave PLC again,
which easily leads to the error of the slave PLC; In XD series PLC, it has send delay to solve
the problem. That is, after receiving data from the slave station, it must delay a certain time to
receive the next communication data, so as not to cause the above problems.
Reply overtime (ms): it refers to the time when the PLC can not receive the response after
sending the request and wait for sending again.
Retry times: It refers to the number of times that the PLC can not receive the reply, and each
reply needs a reply timeout time.
(4) After setting, click write to PLC, then cut off the PLC power supply and power on again
to make the settings effective.
Note: V3.4 version of the XD series of PLC download and upload serial configuration data
must use XNET communication mode, that is, using USB port to download and upload
configuration data. If the following prompt appears, you need to check whether the serial port
parameters you configured are downloaded from the USB port to the PLC.
Note: Versions V3.4 and above can be configured in Modbus communication mode (RS232
port); Versions V3.4 and below XD series PLC must use X-NET communication mode when
downloading and uloading serial configuration data, that is, downloading and uploading
configuration data through USB port.
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