Hello, I am repeatedly receiving the INTF fault on the CPU and when checking the diagnostic buffer it looks like the event is always triggered by "I/O access error when updating the process image input table P area, double-word access, access address:32". Address 32 is the first card on rack 3.

I have replaced the remote I/O coms module on rack 3 and tried re-seating and cleaning the Profibus fibre optic connectors. The fault is intermittent, time frame is sometimes weeks ranging down to minutes between occurrences. Any ideas on potential solutions would be appreciated.