Hello,
We have discussed the use of Diagnostic Channels in this thread:
https://emersonexchange365.com/products/control-safety-systems/f/deltav-discussions-questions/2579/profibus-diagnostic-signals/5901
Siemens ET200S works fine as per KBA AUS1-131-000601153757.
Does anyone have experience with Festo CPX-4AE-U-I? Which channel to configure?
Manual: www.festo.com/.../CPX-AX_2011-07f_526416g1.pdf
So we found that it does work to some extent, but it has an issue: only the first faulty channel is reported. So if we have 4 AI channels and the first and second are both faulty, only the first is reported as faulty. This is also documented in the manual.