Scaling Limits - ABB COM600 series Data Historian Operator's Manual

1MRS756739
5.3.
COM600 series, Version 5.0
Data Historian Operator's Manual
Calculated Trend
Figure 5-1 Calculated value
You can create new variable items that are calculated from the data of the existing vari-
ables. In our example, variable H is the sum of A and C.
If the time span contains both past and future, the calculated
variable will not be displayed as a graph.

Scaling limits

The limits determine the scaling of plots.
Description of scaling limits
The scaling limits are displayed on the left side of the chart. If there are several charts,
each has its own area for limits.
The scaling limits can be displayed in two ways: with the upper and lower limits of
scaling displayed in the boxes, or by using scales whose end points correspond to the
upper and lower limits.
Calculated_value.jpg
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