Hi all!

How to define the reason of FM4581DP stop?

After about 5 months of work FM458 suddenly stopped ((

The CPU (416-2DP) continue working, but FM458 stopped, and diag.buffer of FM458 contains:

Ok, in attachment.

But imho, there was last startup at 12:55 ( based on date, by default starts with 01/01/1994 and about 1 hour some staff doings - restarts, and so... ) and next event - STOP- after 5 months of no messages...

What is the "system error" in event 1?

Hi Andre,

Check the link:

https://support.industry.siemens.com/tf/ww/en/posts/ob34-ob80-error-resulted-416-3dp-cpu-stop/262640/?page=0&pageSize=10

Normally it's recommended to check all the OB's required for Multi-Functional CPU's fault optimization. Check that whether all the OB's are in your online program or not!

Then check there functionality in Online mode because in your diagnostic buffer two events are available setting that there must be some problem in any one nodes of Profibus:

Event 16 of 100:  Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number:    3
DP master system ID:      1
Log. base address of the DP slave: Input address:  1022
Log. base address of the DP master:  32767
Requested OB: Rack failure OB (OB86)
Priority class: 16
External error, Outgoing event
12:00:42.194 AM  01/01/1994

Event 12 of 100:  Event ID 16# 6522
Illegal memory submodule: replace submodule and reset memory

Operating mode: STOP (own initialization)
Internal error, Incoming event
12:26:06.807 AM  01/01/1994

Please check this things and let us know what you have found!

Regards

OmKris