24
Navigation and Customization
Adjusting the Closed Loop Controller
Your pressure controller uses an electronic closed loop algorithm to
determine how to actuate its valve in order to achieve the commanded
setpoint. We have tuned these settings for your specific operating condi-
tions, but changes to your process sometimes require on-site adjustments
to maintain optimal control performance. If you encounter issues with
control stability, oscillation, or speed of response, fine-tuning your closed
loop control may help.
The
LOOP SETUP
Menu lets you choose the closed loop control algorithm
and adjust the gain settings for the proportional, integral, and derivative
variables.
✓
Note:
The D and P variables in the PD/PDF
control algorithm are more typically referred to
as P and I, respectively, in PDF controllers.
Menu
→
Control
→
Advanced Control
→
Loop Setup
•
LOOP VAR
sets the controller’s
closed loop variable. By default,
pressure controllers will only
have their specific pressure
parameter available (gauge,
absolute, or differential).
•
LOOP TYPE
sets the control
algorithm for PD/PDF or PD²I.
•
LOOP GAINS
adjusts the gain
settings for the proportional,
integral, and derivative
(PID) control functions.
•
BACK
returns to the Advanced
Control Menu (
•
MAIN
exits
to the Main Display (
).
Loop Setup Menu
