How Do I Communicate With Modbus From An Omron PLC?

Modified on Sun, 11 May, 2025 at 10:05 PM

The couplers CJ1W-SCU and CS1W-SCU (V1.3) have Modbus slave driver and support the following modbus commands:
  • 01, 02 reading bit multiples (IOC)
  • 03 reading records (DM)
  • 04 reading words I / O IOC
  • 05 writing bit
  • 06 write single register (DM)
  • 08 test echo
  • 0F writing multiple bit
  • 10 writing multiple registers

The instruction applied to CMND cards SCU mode gateway can generate the Modbus master.

See also Getting Started With Modbus for a full list of sample programs for different hardware.

 

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