Is a bit high????

drbitboy · Apr 18, 2020

AustralIan said:
What if it changes when the plc is in stop?

XIC(first-pass bit) => start with a zero total, and override previous state in UDT as zero when XIC(first-pass bit): will only add for ones; will do nothing for zeros.

GaryS · Apr 18, 2020

What is you UDT and Boolean Array of 1048
Data[1048]
or is it multiple DINT words

AustralIan · Apr 18, 2020

drbitboy said:
XIC(first-pass bit) => start with a zero total, and override previous state in UDT as zero when XIC(first-pass bit): will only add for ones; will do nothing for zeros.

What if one instance of the AOI is called twice in one scan of one program? Or once each in two different programs? Or not called the first scan?

drbitboy · Apr 18, 2020

AustralIan said:
What if one instance of the AOI is called twice in one scan of one program? Or once each in two different programs? Or not called the first scan?

Only the last two are a problem, but you're really reaching.

But if that is the case, then the code would have be changed to calculate the total from scratch when triggered by first-pass, and all 1048 would not have to be called on the first scan.

Doug-P · Apr 18, 2020

I'm out of practice but, what about the DDT/FBC instructions?

Is a bit high????

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