OMRON PLC C500 RS422 interface


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OMRON PLC C500 with 3G2A6-LK202-EV1 as CPU mounted device having RS422(9 pin D).

Above configuration is connected to a 4 Wire RS422 to RS232 converter. Further this connects to SI FTA card and to a Serial Interface card.
Array built in HPM to read flags from Base 1 to Config.256.

Need to know the correct address mapping from PLC as purpose is to read DI/DO values as in PLC to the array.

No info found about parity and address range in PLC manual, though baud rate is 9600.

Does anyone has prior experience in establishing similar communication?

Kindly guide us.