Performance Calculation Functions Overview
Performance calculation functions extend the standard Expression Editor function library and are available for use in performance calculation tags and calculation triggers in Data Historian.
Expressions for calculating a calculated tag are defined for the calculated tag itself, as described in Creating a Calculated Tag.
The functions for performance calculation tags are supplemental to all Expression Editor functions. Click one of the following links to learn more about the functions of the selected type (category).
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The image shows Date and Time functions in the Expression Editor's function menu that you can use with calculated tags.
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The image shows data value functions in the Expression Editor's function menu that you can use with calculated tags.
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Historical functions (including standard deviation and variance functions)
The image shows historical functions in the Expression Editor's function menu that you can use with calculated tags.
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The image shows metadata functions in the Expression Editor's function menu that you can use with calculated tags.
