xLadder user manual-V2.0.0.6

You can set the station number, baud rate, data bits, parity bit and stop bit of PLC.

Attention:Only when Easy Ladder software station number is equal to 0

or PLC station number,you can download the program to PLC.

9.2 PR series PLC communication

PR series PLC support free port communication, MODBUS communication and CAN

communication.

Free port communication:

Free port communication is a half duplex communication based on RS-485

communication.Users can make their own communication protocol in free port

communication.Third party devices mostly support RS-485 serial communication .

The core of the free port communication are receiving and sending instructions.

RS-485 communication can not receive and send data at the same time.The RS-485

communication format includes a start bit, 7 or 8 bit characters, a parity bit,

and a stop bit.

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