Hi all,

this stuff is from diagnostic buffer of my CPU-410-5H:

Event 1 of 04: Event ID 16# 3502
OB request error
No relevance for user (Z1): 0000
Cause: Cyclic interrupt clock pulse generator 5
Causing OB: Cyclic interrupt OB (OB 34)
Causing priority class: 11
Requested OB: Timing error OB (OB80)
Priority class: 26
Internal error, Incoming event
06:45:49:926 pm 07/24/2023

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Split from OB request error.