Table Of Contents

Tag Historian Functions

Last Modified: August 28, 2019

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

Configure Tag History Window

Defines the range of historical tag values to read with Read Tag History or Multi Read Tag History.

Read Tag History

Returns the history from a single tag. The data type of the tag must match the polymorphic instance.

Multi Read History

Returns the history from multiple tags in a single operation.

Configure Retention

Defines the retention policy for a tag.


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