Section 6: PI controller
6. PI controller
The system is equipped with a PI (Proportional-Integral) controller. The
controller is used to stabilize any process parameter at a specific level (fig.
6.1).
CONTROL
AFC200
PI
Motor
Sensor of monitored
process size (measurement
of process size)
Set value
of the
process
+
PROCESS
M
-
Fig. 6.1. Using the PI controller to regulate the monitored process size
6.1. Turning on and configuration of the PI controller
The PI controller is switched on by means of par. 2.02 (for control A) or 2.03
(for control B) by selecting the value
"4" - Out. PI.
Changing the process setpoint of the PI controller when the keyboard
reference mode is set (par. 2.60 = 0) is done in the Quick view mode using
the "up"/"down" arrows. For editing to be possible, the current referencing-unit
(par. 2.02 for control place A, or par. 2.03 for control place B) must be set to
PI controller ("4" - OUT.PI). The referencing-unit value can be changed in the
range from 0.0% to 100.0%.
Fig. 6.2. Changing the PI controller ref.-unit value
(keyboard ref.-unit: par 2.60 = 0)
44
TWERD Power Electronics
REF
Hz
rpm
RUN
REV
FAULT
