AC 900F keep booting once fresh download is given (Version 10.3.9142) with roll-up RU3 installed.
In one of the fertilizer plant, we have upgraded the processor to PM902F and software was upgraded to 10.3.9142. We have installed RU-02 and given EPROM Download, and profibus download. but once we are giving fresh download, controller is not getting stabilized, it keeps rebooting.
If we remove the redundancy link cable and later we plug back the cable, controller is getting sync and after that redundancy switchover is also happening.
Looks like a problem with the profibus wiring. The redundancy switchover is triggered via the Profibus. "Redundancy Toggle -> Prim (Fieldbus) 5/6/19 13: 16: 37.319" In the configuration (HW) I can not find a rough mistake. Everything is configured as a redundant system