Lenze 9400 - Manual (Page 197)

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06
197
5 Motor interface
5.7 V/f control (VFCplus)
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5.7 V/f control (VFCplus)
This function extension is available from software version V3.0!
For the closed loop V/f control, the speed controller (also called "slip regulator") also has to be
parameterised for the speed feedback.
• C00971 serves to define the influence of the speed controller in [%] with regard to the reference
speed of the motor ( C00011 ). If the influence is adjusted to the slip expected under normal
operating conditions, the motor cannot accelerate in an uncontrolled way when the encoder
fails.
• To activate the speed controller, parameterise the gain ( C00972 ) and the reset time ( C00973 ).
Short overview: Parameters for speed controller

Note!
The descriptions in the chapter " V/f control (VFCplus) " also apply to the V/f control
closed loop. ( 181)
When this motor control mode is used, the operation can be continued if the encoder
fails. For this, the encoder monitoring must be parameterised to "Warning". If the
encoder fails, the speed controller is "frozen" so that the slip correction via the speed
controller is maintained.
Parameter Info Lenze setting
Value Unit
C00971 VFC: Influence - speed controller 10.00 %
C00972 VFC: Gain - speed controller 0.000 Hz/rpm
C00973 VFC: Reset time - speed controller 6000.0 ms