NORD Drivesystems BU0200 - Manual (Page 283)

SK 200E Manual for frequency inverters
282 Subject to technical alterations BU 0200 GB-4411
9.2 Process controller
The process controller is a PI controller, with which it is possible to limit the controller output. In addition, the
output is standardised to a percentage of a master setpoint value. This provides the possibility of controlling
an upstream drive unit with the master setpoint value and adjusting it with the PI controller.
+
-
X
x1
x2 y
x1*x2
y=
100 %
+ +
Fig.: Process controller flow-chart
9.2.1 Process controller application example
M
M
M
M
0V
10V
Frequency inverter
Setpoint of pilot machine
AIN 1
Enabled right
DIN 1
Actual position CR AIN 2
Nominal position CR
via parameter P412
Master set-
point value
a) Analog input 1
(P400[-03]=2)
b) or
c) Analog Input 2
Setpoint
a) P412 = 0.0-10.0V
Actual val-
ue
Analog input 1
(P400[-03]=6)
or
Analog Input 2
Ramp time PI setpoint P416
P-Factor P413
I-Factor P414
PI controller
Min. limit
P466
Lead value
Analog input
(P400[..] = 16)
Start-up time P102
Setpoint ramp
max. limit
P415
Controlled drive via CR Compensating roller = CR (dancer roller) Pilot machine
Actual
position
of CR via
potentiometer
0-10V
Centre 5V
nominal
position
f
t
Setpoint of
pilot machine
Controller lim-
it P415 in %
of setpoint
Controller
limit P415