Tags historical scan class

I’m trying to figure out what the difference is between selecting the Historical Scanclass Evaluate On Change option, rather than selecting a specific scan class: if I use the Evaluate On Change option, am I going to poll the tag value with the tag non-historical scan class?

Thanks in advance for any suggestion

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Yes, with the added caveat that it will not run if the tag does not change.

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Ok, thanks matt.eaton.