Lenze 8400 motec Series, Software Manual, Page: 86 / 376

8400 motec | Software Manual
Motor control (MCTRL)
V/f control (V encoder)
86
L
Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
5.7 V/f control (V encoder)
This function extension is available from version 02.00.00!
The previously described V/f characteristic control (VFCplus) can be operated with a
feedback of speed. This bears the following advantages:

Stationary accuracy of speed

Low parameterisation effort compared to sensorless vector control (SLVC)

Improved dynamics compared to V/f characteristic control without feedback or to
sensorless vector control (SLVC).

Suitability for group drives

The descriptions in chapter " V/f characteristic control (VFCplus) " also apply for
the V/f control.
(

66)

Note!
• The speed feedback mandatory for this motor control type can be fed in at the
digital input terminals (DI1/DI2) via an HTL encoder.
– In order that the HTL encoder can be evaluated correctly, the digital input
terminals (DI1/DI2) must be configured as frequency inputs. Configuring
DI1 and DI2 as frequency inputs
(

134)
• Make sure that the maximum input frequency of 10 kHz is not exceeded
when the motor control with speed feedback is used.
• As the slip is calculated in the feedback V/f operation and injected through
the slip regulator, the slip compensation ( C00021 ) is deactivated with V/f
control.