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PIPoint.Data.Snapshot.Value.Name

Question asked by hiella on Dec 18, 2018
Latest reply on Dec 20, 2018 by hiella

Hi there,

 

I'm been going through some VBA code that check if PI tag exist and has numeric values. Taking "sometagname" as the tag name we are going to check as an example:

 

Set PIPoint = PIServer.GetPoints("Tag='" & sometagname& "'")

If Not IsNumeric(PIPoint.Data.Snapshot.Value) Then

If PIPoint.Data.Snapshot.Value.Name <> "Scan Off"

And PIPoint.Data.Snapshot.Value.Name <> "I/O Timeout" Then

Tagfound = False

 

I understand the part that if the value in snapshot is not numeric, this tag is considered not found, but what does the "Scan Off" and "I/O Timeout" mean?

 

And more importantly, how do I replicate the function with Java and PI JDBC? I can get the value in pi snapshot by "select value from [piarchive]..[pisnapshot] where tag = 'sometagname' " and check if it's numeric.

But I did not find anything like "value.name" in that same table. How to get this value.name?

 

Thank you,

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