Table Of Contents

Historian Functions (G Dataflow)

Last Modified: February 18, 2020

Retain historical tag values to review, troubleshoot, or analyze data over time.

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Defines the range of historical tag values to read with Read Tag History or Multi Read Tag History.
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Defines how long a tag retains historical values.
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Returns the historical values from multiple tags in a single operation.
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Returns the historical values from a single tag. The data type of the tag must match the polymorphic instance.

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