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System Manual – MOVITRAC® 07
PI-controller
Project Planning
Setting parame-
ters
Activating the PI-
controller
Switch the PI-controller off and on using parameter P250. The setpoint and actual value
settings mentioned initially are active when you switch on the PI-controller.
The
NORMAL
setting increases the correcting variable if there is a positive system de-
viation; the correcting variable is reduced if there is a negative system deviation.
The
INVERTED
setting increases the correcting variable if there is a negative system
deviation; the correcting variable is reduced if there is a positive system deviation.
Controller parame-
ters
You can adapt the controller to the application using the following settings:
Setpoint selec-
tion
The following settings are possible as the setpoint source. You can select the setpoint
source with parameter P100.
•
UNIPOL/FIX.SETPT: The setpoint set using the local setpoint potentiometer applies
until one of the following fixed setpoints is selected:
P163/164/165 Setpoint n11/12/13 scales PI-controller [0 ... 100 %] step width: 0.1 %
P173/174/175 Setpoint n21/22/23 scales PI-controller [0 ... 100 %] step width: 0.1 %
•
RS-485 (only for service purposes)
•
SBus: Specify the setpoint and set it using the following bus parameters:
P870/871/872 Setpoint description PO1/PO2/PO3 [PI-controller setpoint [%]]
PO1/PO2/PO3 = 0 ... 2
14
= 0 ... 100 % PI-controller setpoint
The following settings do not have any effect: MOTOR POT, FIX SETP+AI1 and FIX
SETP*AI1. If you set these, the inverter always specifies the setpoint zero.
Setpoint selection is always unipolar. The inverter restricts negative setpoints (e.g. via
RS-485 or SBus) to zero.
P 250
PI-control-
ler
Off
Normal
Inverted
P 251
P-gain
0 ... 1 ... 64
Step width:
0.01
P 252
Time constant
n-control.
0 ... 1 ... 2000 [s] Range:
0
0.01 ... 0.99
1.0 ... 9.9
10 ... 99
100 ... 2000
Step width:
Time constant
n-control.
OFF
0.01
0.1
1
10
