2 Replies Latest reply on Mar 8, 2018 2:30 PM by rschmitz

Getting The Value Of a Digital State

msmassey Mar 7, 2018 10:45 PM

I have a pump (on/off/on/off). When I bring the PI tag in as a String or Int16, and attempt to find the TagMin, it says that it can't do a summary calculation on non-numeric data. the underlying data from the PLC is a 1 or 0, and then the digital set displays the text. All I want is the raw value?

Tag Pump1 comes in as <Anything>, probably should be String

Tag Pump 1 Digital Status comes in as an Int16

All I want to know is if the value went to "OFF" or 0 in the last 120 minutes. Seems simple.....

Suggestions?

Re: Getting The Value Of a Digital State

igreguri Mar 8, 2018 11:21 AM (in response to msmassey)

You can try something like...
if 'Pump 1'="OFF" and TimeStamp('Pump 1')>'*'-'-2' then EventCount('Pump 1','*','*'-'-2') else NoOutput()

Regards,
Igor
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Re: Getting The Value Of a Digital State

rschmitz Mar 8, 2018 2:30 PM (in response to msmassey)

Hi Mark,

Given you're end goal, I would think the TimeEQ function is actually what you're looking for. You can check if the value was equal to 0 or "OFF" and see if the value returned from TimeEQ is greater than 0.

Cheers,
Rob
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