bbachiega

Problem getting snapshot values from a PIPoint data reference attribute

Discussion created by bbachiega on Oct 22, 2012
Latest reply on Oct 25, 2012 by cmanhard

 

 

I am trying to access the value of an attribute from an element in AF. I can see the element, attribute and values when using PSE but when I try to get it programmatically I get an error.

 

My attribute variable is called "AttributeVar" and it is not null. I can see other properties from it.

 

          Dim MyValueAttr As New AFValue

 

                Dim nowTime As AFTime = New AFTime("*")

 

                attrValue = AttributeVar.GetValue(nowTime)

 

 This is the error I get when trying to evaluate attrValue.Value

 

Unable to create the PISDK. PI Data References will not function.

 

 

 

I also tried getting the PIPoint from the "rapipoint" property and get the data directly from the PI Server but it also did not work. Here are the problems:

 

AttributeName.RawPIPoint  is “Nothing

 

AttributeName.configstring gives me more than the confistring itself: "\\PISYSTEMNAME?f39f539e-c5cc-4a00-8efe-c8b9a196adb4\PMU-freq-Damp-006.FFT?3361"

 


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