teeradek
I am new for openplc, for my project I need to read data from serial device like barcode reader or rfid reader via rs232 or rs485 seial communication ( not modbus rtu).
Can openplc read data from these device? 
Thank you for your help.
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thiagoralves
If it is not modbus rtu, no it can't. You will have to either create a gateway program (or a gateway device) that translates the serial data to modbus, or modify OpenPLC's code to incorporate this functionality, which will not be straightforward by the way.
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teeradek
thank you for your suggestions.
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