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Metadata Properties

Engineering units, high/low scales, high/low limits, dead-bands , and data transformations are the changeable metadata properties of a tag. There are two ways that metadata properties are beneficial to the Canary Admin.

  1. Searching For Tags

  2. Data Visualization

Searching for Tags

Searching in Axiom or Virtual Views can be done via metadata properties. A description or other metadata property added to a tag can distinguish it from other similarly named tags, making it much easier to find the tag.

Data Visualization

Engineering units, high/low scales, and high/low limits also affect how the data is displayed using Axiom. When the data is viewed in Axiom, the scale may not reflect the high/low scales recorded in the metadata properties. Axiom overrides the stored scale with a scale range written by the lowest/highest values. Axiom does give the option to change the scale range through a manual input.

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  • Metadata properties also affect the data exported from the historian as these properties are stored with the data.

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