Modbus binding after migration OH1->OH2

This did not help.

Finally I have found solution. The problem was with this :face_with_symbols_over_mouth::face_with_symbols_over_mouth:USB/RS485 interface for 4E :rage::
image

After I bought new one, problem gone.
Thank @rossko57 for your advices and help !

Sometimes the simplest things … :crazy_face:

Are you still using two serial buses? It’d be useful to know that works in “real life” instead of just ‘should’.

Yes, since yesterday worked without any error. It looks that even one broken controller has influence on whole Modbus, since my second bus has some errors as well. That’s why when I connected just one (not broken) it was working well and it was hard to get any logical solution.