7 v/f control (vfcplus), V/f control (vfcplus), V/f control (vfcplus) ( 245) – Lenze E94AxPExxxx User Manual
Page 245: 6motor interface
Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
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6
Motor interface
6.7
V/f control (VFCplus)
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6.7
V/f control (VFCplus)
For the closed loop V/f control, the speed controller (also called "slip regulator") also has to be
parameterised for the speed feedback.
•
serves to define the influence of the speed controller in [%] with regard to the reference
speed of the motor (
). 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 (
) and the reset time (
Short overview: Parameters for speed controller
Note!
The descriptions in chapter "
" also apply to the V/f control.
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
VFC: Influence - speed controller
10.00 %
VFC: Gain - speed controller
0.000 Hz/rpm
VFC: Reset time - speed controller
6000.0 ms