I am wondering if when I build a trend can I enter a value like this on the Define Trend Box ('mytag.pv')-('myothertag.pv)
In PI ProcessBook, you can use 'PI Calc' option instead of loading tags to trend. PI Calc option can give you results for most PE functions.
In PI Vision, well we recommend this to be done in AF so that this calculation is re-usable. Formula Data referenced AF Attribute can be created and be consumed for this purpose.
Thank you for the answer.
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