Rockwell Automation FactoryTalk Historian SE ActiveView 3.2 User Guide - Manual (Page 20)

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FactoryTalk Historian ActiveView User Guide
12
Database Sets the value scale using the tag attribute values in the Point
Database. Zero is the minimum. Zero + Span is the maximum. See
the Historian Server Reference Guide for more information on tag
attributes.
Absolute Allows you to type a custom value for the value scale of a tag. Type
the value in the adjacent box.
8. If you have selected Absolute, type in the Maximum and Minimum
values of the scale in the adjacent boxes.
9. Click OK.
Modifications made to a trend through use of this dialog box do not
affect the stored settings of the trend.
To return the trend scale to its original settings, click Revert on the
context menu.
View Layers
Layers can be created in FactoryTalk Historian ProcessBook displays.
Layers allow you to treat related graphical elements as a group. You can
hide or show a layer at run time. There is an interface for showing and
hiding layers this in both FactoryTalk Historian ProcessBook and
FactoryTalk Historian ActiveView.