Counting cycles

Mtech

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• Jun 12, 2011

• #1

Hello,
I'm getting ready to write some programming to count a cycle up to one million. I'm doing this to test a life cycle of a part. Does anyone have any ideas on a decent way to do this? Thanks for any input.

 

Ron Beaufort

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• Jun 12, 2011

• #2

http://www.plctalk.net/qanda/showthread.php?p=74351&postcount=8

 

Ken Roach

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• Jun 12, 2011

• #3

Is the problem counting to 1 million in increments of 1, or is the problem the general sequencing of the test program ?

What controller platform are you using ?

 

Mtech

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• Jun 12, 2011

• #4

Thanks for the replies. Ron's post answered my question. I just didn't give the use a floating integer enough thought. Thank you much.

 

Ron Beaufort

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• Jun 12, 2011

• #5

depending on which platform you're using, you might have access to either "long integers" or "double integers" ...

this approach would allow you to make use of 32-bit math - and let you easily count all the way up to 2,147,483,647 (over two billion) with no loss of resolution ...

 

TConnolly

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• Jun 13, 2011

• #6

1 million counts in units of 1 is no problem with a float.

16.7 million counts (or more) in units of 1 is a problem with a float.

 

Mtech

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• Jun 13, 2011

• #7

I will only need to count to 1 million in counts of one. However, I'm willing to learn more about this subject. I am using a 1766 micrologix 1400 series A PLC.