FXos-20MR-ES It does not work after a power outage

[markomiej 0]

Mitsubishi FXos-20MR-ES
It was programmed by the service, it works correctly.
After a power failure, it stops working after restarting. RED Prog-E LED flashes
The description shows that this PLC does not have a battery. It has permanent memory.
What could be the problem?

[panic mode 246]

the power failure was likely result (or cause) of a transient/surge. if the PLC is not protected against this, it may get damaged or memory can be lost or corrupted. so check your circuit

 

[Gambit 326]

It's probably what Panic mode already mentioned but you really should check the error in the PLC. 

It could be that some values are needed which aren't latched.

 

[Ron_S 61]

They're pretty bullet proof those FX0s's 

You need to connect and read the fault code.