Thank you for sharing your question in PI Square!
You could use the Performance Equations syntax to build an expression and use this expression as the entry for the 'Arvhive Value' (or 'sampled data' to get it for different periods) function, for example:
In the expression field you can enter something like:
TagAvg(tagname, starttime, endtime)
You can check this syntax in the help file called PEReference.chm in the %pihome%\help directory.
Please, let us know if you have any questions or you need any further information.
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Hello Eugene, Hello Jose,
Thank you very much for your answer. I will try your ideas. Thank you. Have a nice day.