I'm having the same problem with a Connect. I cannot get modbus to work in Codesys with RS485 connector on the front. (see image in this post: https://revolutionpi.de/forum/viewtopic ... sys#p13118
I followed the comments from Nicolai and turned off PiModbus Master and Slave in Pictory.
I also followed the Codesys steps here: https://revolutionpi.com/tutorials/beis ... u-slave-2/
- This suggests to use tty/USB in the CODESYSControl.cfg settings.
I checked these steps per an old post from Amar: https://www.fleaplc.it/index.php/tutori ... ys-control
Somebody is suggesting to use /ttyRS48 (no '5') and set to port 6: https://forge.codesys.com/forge/talk/Ru ... 2239cdd18/
- but that's not working either.
I'm a bit lost with all these different options? What is the official suggestion from Kunbus? And how should i troubleshoot this: do i check dmsg first? Can I check any log in Codesys that may be helpful?