Modbus RTU communication

[Joshua Gicheru 0]

Hi, I am using CJ2M-CPU31, and SCU32. I am new to serial communication field especially modbus. I need to read data from a weighing module that uses Modbus RS485. What instructions should I use on the ladder logic to Read the data, or if I am supposed to create a function block, what should I include in the FB? I will appreciate your assistance.

[gclshortt 51]

http://www.omronkft.hu/nostree/pdfs/sysmac/w494-e1-03.pdf

The following link may help you out.
http://forums.mrplc.com/index.php?/topic/20043-rtu-modbus-with-cj2m-plc-and-3g3rx-drives-on-rs485/

Regards,