Rockwell Automation FactoryTalk Historian SE ProcessBook 3.2 User Guide - Manual (Page 135)

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Visualize Data with Symbols
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Configure Trend Scale
The Trend Scale dialog box provides easy access to the value scale
settings for each tag in a trend, SQC chart or XYPlot. If the plot uses a data
set, only the Autorange and Absolute options are available for the
Maximum and Minimum scale settings.
To configure a trend scale:
1. In Run mode, double-click the plot's value scale to open the Trend
Scale dialog box.
In FactoryTalk Historian ProcessBook you can also click View > Trend
Scale. This menu object is not available in FactoryTalk Historian ActiveView.
2. Select the Single Scale or Multiple Scales option.
3. If you are using multiple scales, then select the tag for which to set the
scale options from the Tags list.
4. Select Autorange, Database, or Absolute options for the Maximum
and Minimum values of the scale.