Posted 26 Dec 2019 Hello, I have been reading some post on this forum about Modbus and omron, but it has been complicated for me communicate an Omron PLC and a computer just to test the Modbus communication. I have a PLC OMRON CJ2M-CPU32 20K with a CJ1WSCU31-V1 that I want to communicate trough Modbus first with a computer just to test that is everything working ok. How can I do that? How do I need to configure the units, switch? Nodes? Im using multiway, and CX programmer, I already downloaded Macro Protocol to the PLC, but by now the only thing that I get is RD1 flashing when Modbus poll software is active on the computer, but this software says timeout, and don’t receive packets… I have used the easymodbus excel file to create the code to communicate the PLC, but as I see isn’t working. Does somebody in here have got to connect a plc to the computer with this easy modbus file? How is the proper way to use it? Or there is a better way to use Modbus in Omron? I’m really desperate. Share this post Link to post Share on other sites