Still problems with modbus

[gdimaria]

3 modbus devices on an LM and I can't control them. 

The commands sent do not always arrive, it is necessary to repeat them many times. 

The devices go offline all the time. 

I tested the line with the modbus poll tool run by a pc: I opened 3 connections at once and immediately wrote and read without problems. 

So the problem stems from LM. 

What I can do?

I am in a rather embarrassing situation towards our client. Thank you.

[Daniel]

You should always report the error logs on modbus as this can give some indication what is the problem.
Make sure wiring is correct and GND is connected. Lowering budrate might help. Some slaves need longer brake between pools so read_delay is needed in the profile. Also lower the pool interval.