Define tag zones for your data
- Last UpdatedOct 03, 2025
- 2 minute read
Often, you want to quickly identify data values that fall outside of the norm. You can use the tag dictionary to define a tag zone for any given tag's data values.
How you interpret the tag zone is up to you:
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You can specify a "zone" of expected values on a tag-by-tag basis.
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You can similarly use a tag zone to specify a danger or "watch" zone.
When you define tag zones, you can display them in line charts.
To ensure good visibility, each line chart can include a maximum of three tag zones.

The Home page and dashboard tiles will not show zone previews -- just the associated tag data.
Note: If you have a chart open while you add a corresponding tag zone, you will need to reload the chart to display the new tag zone.
To define a tag zone for a tag
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Select Administration from the navigation rail.
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Select Tag Dictionary.
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If prompted, use your Microsoft account credentials to sign in.
You will see an Excel worksheet with the Configuration Assistant add-in pane on the right.

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Locate the tag for which want to define a tag zone.
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Add values for the three Zone extended properties (Zone1_Type, Zone1_Value1, and Zone1_Value2).

Use these guidelines:
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Zone1_Type can be one of these four values:
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between
Requires both Zone1_Value1 and Zone1_Value2 -
outside
Requires both Zone1_Value1 and Zone1_Value2 -
below
Requires Zone1_Value1 only -
above
Requires Zone1_Value1 only
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Zone1_Value1 and Zone1_Value2 must be numeric values.
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In the add-in pane, select Save.