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carry flag

carry flag

carry flag

(OP)
In Omron PLC programming I continuoulsy run across a cf?? input that needs to be turned on/off depending on situation.  I have looked over the program and see no place that will trigger said input.  Can anyone tell me what controls a carry flag.

Thanks

RE: carry flag

The obvious answer is: A mathematical operation. Like adding two numbers and the result is greater than the numerical range covered by the processor.

But there are other answers, too. Like you have a counter that overranges. Or anything like that. Have a look in the manual - it usually covers these things.

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: carry flag

(OP)
Maybe I am misunderstanding the concept here.  Looking thru the instruction sheets on CX-Programmer I see a (CY) as a Carry Flag denotation.  I am looking for a description of a (CF) input command.  Nothing in these sheets that I can find.  Could someone explain please?

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