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AF attribute in PI DataLink expression

Question asked by igreguri Champion on Jul 6, 2018
Latest reply on Jul 6, 2018 by igreguri

In PI DataLink (Sampled Data) I use following expression to remove „No Data“ message in cells...

if tagval('tag')="No Data" then " " else tagval('tag')


How instead PI tag use AF attribute in expression and remove message „Data was not available for attribute“?