Dear All,
We are in need of your expert opinion.
One of the nodes of our Crane's Cabin gives a station failure problem, due to which whole Crane shuts down. we have done everything from replacing Dp connectors to changing Profi cables, swapping modules with other stations, changing Power supplies but the problem remains the same.
Following are the system details,
1. CPU S7 319 F3 fail safe
2. IM 153 interface module
3. OLM module for signal conversion fibre to profibus from main CPU.
We have several nodes after OLM but fault was persistent with 3 nodes. After comprehensive working, it came down to just one but still not diagnosed. I will also upload the diagnostic buffer if needed.