Chapter 4: Programming the PEC Plus Phason
50 2009-06-15
For example, you might decide to have the actuator open to 40 percent at stage 1, 60 percent at
stage 2, 80 percent at stage 3, 90 percent at stage 4, and 100 percent at stage 5.
However, you don’t want the actuator to open directly to 40 percent. That is why there are two
temperature settings for each stage. The first setting is the stage set point. This is where the actuator
starts opening. The second setting is the differential. This is where the actuator reaches the stage
position.
In other words, “when the temperature is here (stage set point), I want the actuator to start opening.
When the temperature reaches here (stage differential), I want the actuator to be at this position
(stage position) percent.”
If you press a parameter button that has no function for the relay, the display shows
----. Press
Back to return to the previous display.
Use the
Actuator settings worksheet on page 91 when setting up actuators.
You can use actuator control for curtain machines only if they have feedback
potentiometers.
Do not use actuator control for curtain machines without potentiometers. This can
burn out the curtain machines. For information about programming the PEC Plus to
control curtain machines without potentiometers, read
Programming curtain control
relays
on page 52.
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