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2 process controller, 1 process controller application example, 0v 10v – NORD Drivesystems BU0180 User Manual

Page 159: Process controller application example

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9 Additional Information

BU 0180 GB-0914

Pre-series version

159

9.2 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.: Flow diagram process controller of the SK 1x0E

9.2.1

Process controller application example

M

M

M

M

0V

10V

Frequency inverters

Setpoint of pilot machine

AIN 1

Enable right

DIN 1

Actual position CR

AIN 2

Nominal position CR

via parameter P412

Master set-
point

a) Analog input 1

(P400[-01]=2)

b) or

c) Analog input 2

Setpoint

a) P412 = 0.0-10.0V

Actual
value

Analog input 1
(P400[-01]=6)

or

Analog input 2

Ramp time PI setpoint P416

P-Factor P413

I-Factor P414

PI controller

Min. limit

P466

Lead

Analog input

(P400[..] = 16)

Start-up time P102

Setpoint ramp

max. limit

P415

controlles drive via CR

Compensating roller = CR (dancer roller)

Pilot machine

Actual CR

position via

Potentio-

meter 0 -10V

Centre = 5V
setpoint posi-
tion

f

t

Setpoint of

pilot machine

Controller
limit P415 in
% of setpoint

Controller li-
mit P415