
9 ● FactoryTalk Historian DataLink Function Reference
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An output code to determine results placement, either 0, 1, or 2.
The target FactoryTalk Historian server.
The mode used to determine which values are retrieved.
Returns
Example:
The following retrieves the interpolated value for the tag cdep158 at
7:20pm on December 11, 1992 from the FactoryTalk Historian server
casaba:
=PIArcVal("cdep158","11-dec-92 19:20",0,
"casaba","interpolated")
PIExpVal()
Retrieves an archived FactoryTalk Historian point value based on an
expression, using the following syntax:
PIExpVal(expression, timestamp, PIServer)
Arguments
A FactoryTalk Historian calculation expression.
The time stamp corresponding to the archive value.
The target FactoryTalk Historian server.
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