Seems IW_PR_Schrittnummer is only referenced in 3 spots... where it's declared and where its read in the fbd routine... I guess what I'm asking is something writing a number to this variable... or what? If so how would I find it... also what is the action being performed by this first function block? looks like there are 4 inputs, Auto, is Auto Active, does tasknumber = 0, and is Press Free. if all 4 of these are true... then End Auto. Does that sound right??? someone else programmed this for a job that does work. The tags are in German.
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The IW_PR_Schrittnummer is linked to input I/O using AT %ID716 command. So it gets its value from I/O memory. That basically means that "take this value from input memory at address 716 and the size is D (double word, 32 bits).
I'm not sure how you can check what is in that address when it's defined with direct addressing like this. Hopefully someone else knows a good tip for this!
More info about addresses: https://infosys.beckhoff.com/english.php?content=../content/1033/tc3_plc_intro/18014401038842507.html&id=6547931155168793261
More info about addresses: https://help.codesys.com/webapp/_cds_at_declaration;product=codesys;version=3.5.15.0
That logic from your 1st image works as you said. So AutoFinde will be TRUE, if Auto, AutoAktiv, IstFrei are all TRUE and the input IW_PR_Schrittnummer is 0. Otherwise the AutoFinde will always be FALSE.
Quirzo
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Thanks for answering, I appreciate it! That definitely helped me – Kyle Cecil Apr 17 '20 at 06:05
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Glad to hear that! – Quirzo Apr 17 '20 at 10:36