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Is it possible to program Last Runtime ETM, and if so how?

Total Run ETM and Current Run ETM are easily programmed with appropriate triggers. Capturing the respective start and end points for use in Last or Previous Run ETM or a numeric experession is not obvious to me. Is it even possibly with out resorting to programming such functionality in a PLC? If so, how? Is there a programming example available or a guide?
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Take a peek at this example process and see if it meets your needs.
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I would suggest a sample object. Data = current run ETM, Sample = not running data member.

This will capture your current run etm value each time your equipment stops. You can display up to 31 previous samples (..\Sample1.1, ..\Sample1.2 etc)
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I should have looked at the previous example first, it's the same thing.
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