NORD Drivesystems BU0500 - Manual (Page 160)

SK 500E – Users Manual for Frequency Inverters
160 BU 0500 GB-1013
8.2 Process controller
The process controller is a PI controller which can be used to limit the controller output. In addition, the
output is scaled as a percentage of a master setpoint. This provides the option of controlling any
downstream drives with the master setpoint and readjusting using the PI controller.
+
-
X
x1
x2 y
x1*x2
y=
100 %
+ +
Fig. 15: Process controller flow diagram
Pos : 445 /Anleit ungen/8. / 9. Zusatzinfor mationen [BU 0500 / BU 0200]/ 8. 2. 1 Anwendungsbeispi el Pr oz essregl ers @ 0\mod_1328186990203_388. doc x @ 14190 @ 3 @ 1
8.2.1 Process controller application example
M
M
M
M
0V
10V
Master
setpoint
Analog input 1
(P400=4)
or
Analog input 2
Setpoint
P412 = 0.0-10.0V
Controlled drive via CR
Actual value
Analog input 1
(P400=14)
or
Analog input 2
Compensating roller = CR (dancer roller)
Ramp PID controller P416
Pilot machine
P-Factor P413
I-Factor P414
Actual
position of CR
via
potentiometer
0 – 10V
PI controller
Centre = 5V
nominal
position
Min. limitation
P466
Lead
Analog input 1
(P400 = 16)
Start-up time P102
Setpoint ramp
Max. limitation
P415