Controller PM866 Went to Fault Mode
In backup log it shows controller reset signal received through CEX cable. this is synchronisation cable between 2 controllers. Check connection once.
Another as your profibus configuration succeeded as per log in both primary and secondary, after application creation it went down. So please check Heap memory.
Controller -----> Rightclick -------->Properties, Check Heap memory ststua application wise.
If any exceeded from mentioned value, please work on that.