Parameterising The Slip Regulator - Lenze 8400 StateLine C Reference Manual

5.6.2.1

Parameterising the slip regulator

The slip regulator is designed as a PI controller. In order to improve the response to setpoint
changes, the setpoint speed or setpoint frequency is added to the output (correcting
variable) of the slip regulator as feedforward control value.
 In contrast to the conventional speed controller, the slip regulator only regulates the
slip.
 In the Lenze setting, the slip regulator features a configuration with a goof robustness
and moderate dynamics.
Parameter
C00971/1
C00971/2
C00972
C00973
Slip regulator gain Vp
The setting range of the slip regulator gain Vp (C00972) which leads to a stable operational
performance, mainly depends on the resolution of the speed sensor. There is a direct
relationship between encoder resolution and gain:
 The higher the encoder resolution, the higher the gain can be set.
The following table provides maximum and recommended slip regulator gains for encoder
with standard encoder increments:
Encoder increment
[Increments/revolution]
8
64
100
120
128
256
386
512
640
768
896
1014
1536
2048
3072
4096
[5-1] Slip regulator gain Vp based on the encoder increment
Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
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Info
VFC: Controller limitation V/f +encoder
VFC: Slip limitation V/f +encoder
VFC: Vp V/f +encoder
VFC: Ti V/f +encoder
Slip regulator gain Vp
maximum
0,09
0,52
0,79
0,94
1,00
1,29
1,63
1,97
2,31
2,65
2,99
3,33
4,69
6,05
8,77
11,49
L
8400 StateLine C | Reference manual
V/f control (VFCplus + encoder)
recommended
0,06
0,31
0,47
0,57
0,60
0,77
0,98
1,18
1,38
1,59
1,79
2,00
2,81
3,63
5,26
6,90
Motor control (MCTRL)
Lenze setting
Value Unit
10.00 Hz
100.00 Hz
0.100 Hz/Hz
100.0 ms
157