CPU did n't give the output,Istack message enclosed

[kareemmm]

Now we are facing a problem that our S5-115U is not working proper Last time we have a power failure in our plant and when restart the plant I saw in the plc message that battery low. I replaced the battery and energize plc. But it didn't give the out put. So I reload the program again but I can't cold start the plc, Then I use the trouble shoot using our SIEMENS FIELD PROGRAMMER and the following are the ISTACK messages I request pls. give the solution and what may the problem

SIEMENS SIMATIC S5 PS 3A 115U CPU 942B DIGITAL INPUT

32 X DC 24V 3CARDS

DIGITAL OUTPUT

32 X DC 24V 4CARDS

 

[PeterW]

The ISTACK second page tells you why it crashed, but it needs to start and crash to get that page. The info you have shown just tells us the make-up of the PLC.

I'd try an overall reset of the CPU and then run the PLC to ensure it can run empty. Then stop and reload.