Detaction of Missing Slaves During Startup

I just use this thread as it is about DP diagnostic and OB86.
I use OB86 to diagnose DP slave outage:
ADP slave is cut off while the power of the PLC is turned off.
Whenthe power is turned backon, the synchronisation of the DP network takes place before the CPU starts.
That means, all my OB86 or OB82 calls for missing modules are triggered before the CPUgoesto run modeand are therefore not executed.
When finaly the CPU comes up to run everything looks fine and my program won't recognise the missing slave (unless I do a P access and wait for OB122 or OB85 to be triggered).
Is there a way to change the start-up behavior or to access the information of missed OB events after start?

Regards
Jorg