User's Manual
Parameter Trending Screens
The parameter trending screens plot the value of a register over time.
These real-time displays allow you to view a register value graphically. You
can specify the scale for the Y-axis of the graph (the register value) and the
X-axis (time). The maximum update rate for a parameter trending screen is
1 second.
To set up a parameter trending screen:
1.
Enter the handle of the register you want to plot on the screen, then
press
ENTER. If you want to keep the register that is currently in use,
press the button labeled
KEEP PREVIOUS.
2.
Enter the minimum boundary value you expect the register to attain,
then press
ENTER. This value becomes the minimum boundary of the Y-
axis of the trending graph. If you want to keep the value that is currently
in use, press the button labeled
KEEP PREVIOUS.
3.
Enter the maximum boundary value you expect the register to attain,
then press
ENTER. This value becomes the maximum boundary of the Y-
axis of the trending graph. If you want to keep the value that is currently
in use, press the button labeled
KEEP PREVIOUS.
4.
Enter the number of seconds you want to elapse between each point on
the graph. This determines the scale of the X-axis of the graph. For
example, if you specify 1 second between each point, the X-axis will
span 150 seconds. If you specify 2 seconds between each point, the X-
axis will span 300 seconds. If you want to keep the value that is
currently in use, press the button labeled
KEEP PREVIOUS.
You do not need to specify a title for a parameter trending screen. It is pre-
set to display the label of the selected register (or the register name if no
label has been defined). The present value of the selected register is also
displayed in numeric format at the top of the graph.
This value depends
on the number of
seconds you specify
between each point.
The value in the
register is displayed
and updated once per
second.
The register label is
displayed (or the
register name if no
label has been setup).
The high boundary of
the scale is shown here.
The low boundary of
the scale is shown here.