Lenze E82xVxxxKxxxxx - Manual (Page 318)

Function library
Process controller
Set control loop properties
10
l
318 EDS82EV903 EN 3.0
10.9 Process controller
10.9.1 Set control loop properties
Description
The process controller serves to put up control loops for controlling e.g. speed, pressure,
temperature, flow rate, humidity, level or dancer position.
The process controller requires a setpoint and an actual value (e.g. from a sensor). If
setpoint and actual value are selected as analog values (potentiometer, PLC), the controller
must be equipped with an application I/O to build up a control circuit.
Codes for parameter setting
Code Possible settings IMPORTANT
No. Name Lenze Selection
C0070 Process
controller gain
1.00 0.00
= P component
inactive {0.01} 300.00 ^ 318
C0071 Process
controller reset
time
100 10 {1} 9999
= I component
inactive
^ 318
C0072 Differential
component −
process
controller
0.0 0.0
= D component
inactive {0.1} 5.0 ^ 318
C0074 Influence of
the process
controller
0.0 0.0 {0.1 %} 100.0 ^ 318
C0238
v
Frequency
precontrol 2 0 No feedforward control (only process
controller) Process controller has full
influence
^ 318
^ 322
1 Feedforward control (overall setpoint +
process controller) Process controller has restricted
influence
2 No feedforward control (overall
setpoint only) Process controller does not have
any influence (inactive)
Overall setpoint (PCTRL1−SET3) =
main setpoint + additional
setpoint
Adjustment
1. Roughly adjust the control features in the following tables based on the guide
values.
2. Fine adjustment:
– Adjust C0070, C0071 and C0072 so that the target value is reached quickly and
with minimum overshoots in case of setpoint and actual value changes.
Scaling C0071
Value in C0071 Resulting reset time T
N
10 ... 5000 10 ms ... 5000 ms
5000 ... 6000 5 s ... 10 s
6000 ... 7000 10 s ... 100 s
7000 ... 8000 100 s ... 1000 s
8000 ... 9998 1000 s ... 9998 s