8400 HighLine | Parameter setting & configuration
Motor control (MCTRL)
V/f characteristic control (VFCplus)
116 L Firmware ≤ 05.00 - DMS 4.2 EN - 02/2010
If a sudden load is built up at the motor shaft (e.g. drive is blocked), the overcurrent
disconnection may respond (fault message OC1 or OC11).
5.4.2 Optimise control behaviour
The V/f characteristic control (VFCplus) is generally ready for operation. It can be adapted
subsequently by adapting the characteristic and/or the drive behaviour.
Adapting characteristic
For the linear and quadratic characteristic, it is also possible to match its curve to different
load profiles or motors by adapting the V/f base frequency (C00015
) and the V
min
boost
(C00016
).
Adapting the V/f base frequency
( 117)
Adapting the Vmin boost
( 119)
Freely defining the characteristic
As of version 04.00.00, the V/f characteristic can also be defined freely if the linear and
quadratic characteristics are not suitable.
Defining a user-defined V/f characteristic
( 123)
Adapting drive behaviour
Limitation of the maximum current by a current limitation controller (e.g. to prevent
the motor from stalling or to limit to the maximally permissible motor current).
Optimising the Imax controller
( 120)
Adaptation of the field frequency by a load-dependent slip compensation (improved
speed accuracy for systems without feedback)
Adaptation of the controller parameters of the slip regulator if V/f control (VFCplus +
encoder) is selected. Parameterising the slip regulator
( 130)
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