FM350-2, observe DB30.DBX22.0

Hello everybody;

I want to ask a question about FM350-2 it is related with observing the physical output of the high speed counter card "Q0". It looks like DBxxx.DBX22.0 in its manual as CONTROL_SIGNALS.SET_DQ0.

In our project, related DB is DB30. however, when I put DB30.DBX22.0as triger input of a counter, I can not see any change on counter.. An expert told me that"you can watch it from DB30.DBX42.0 as CHECKBACK_SIGNALS.STS_DQ0"this is working for counter.

But I want to see if it is physicallytriggered or not. Is it possible to observe that signal directly or STS_DQ0 is the only way to see it???

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New subject after splitting from Direct Access of FM350-2.