Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 492)

Configuring trends
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13–21
Configuring pen scale
The pen scale defines the range of numbers on the vertical axis. The
vertical axis changes to reflect the minimum and maximum values for
the selected pen’s tag.
For example, if Tag1 has a minimum value of 10 and a maximum value
of 100, the range on the vertical axis will be 10 to 100 when the Tag1
pen is selected. If Tag2 has a minimum of -10 and a maximum of 50,
the range on the vertical axis will change to -10 to 50 when the Tag2
pen is selected.
If you want all pens in the trend to use the same range on the vertical
axis, specify the same range in the Custom Min/Max field.
Use Tag’s Min/Max
Select this button to use the tag’s minimum and maximum range as
configured in the Minimum and Maximum fields of the Tag Database
editor.
Custom Min/Max
Select this button to specify a range, then type minimum and
maximum values. To always have the same range on the vertical axis,
specify the same minimum and maximum values for all pens.