B.3.1 Map Control Loops - GE Xcellerex XDUO Quad Single-Use Mode D'emploi

B User interface description
B.3 User interface: control functions

B.3.1 Map control loops

B.3.1 Map control loops
Control loop mechanism
PID (proportional-integral-derivative) controller is a generic control loop feedback me-
chanism. A PID controller calculates the difference between a measured process variable
and a desired setpoint. The controller attempts to minimize the error by adjusting the
process control outputs.
PID controller is utilized to control all system modules as well as most processes. PID
control is exerted using four control parameters:
•
•
•
•
These four parameters regulate how much, how fast, and how close to the set value the
control should act.
All control loops described in this chapter are PID control loops.
A control loop includes all following parts:
•
•
•
Types of process control loops
The process control loops belong to one of the following three PID control loop types:
PID control loop
type
Primary
Secondary
Stand-alone
390
P - Proportional
I - Integral
D - Derivative
DB - deadband
The measurement apparatus
The controller
The final output device.
PID control loops
pH control
•
Pumps 1-2
•
Remarque :
Any secondary loop can also be used as stand-alone loop.
Agitator
•
Vessel temperature control
•
Xcellerex XDUO Quad Single-Use Mixeur Mode d'emploi 29-0885-07 AA