8400 StateLine C | Reference manual
Motor control (MCTRL)
V/f control (VFCplus + encoder)
154 L Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
5.6 V/f control (VFCplus + encoder)
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
5.6.1 Parameterisation dialog/signal flow
Proceed as follows to open the dialog for parameterising the motor control:
1. »Engineer« Go to the Project view and select the 8400 StateLine controller.
2. Go to Workspace and change to the Application parameters tab.
3. Select the motor control from the Overview dialog level in the Motor control
(C00006
) list field:
• "7: VFCplus: V/f linear +encoder" for linear characteristic or
• "9: VFCplus: V/f quadr +encoder" for square-law characteristic
4. Click the Motor control V/f encoder button to change to the Overview Motor
control V/f dialog box.
• This dialog level only shows a simplified signal flow with the most important
parameters.
• When you click the >>More details button in the left-most position, a signal
flow with more details/parameters is displayed, as shown in the following
subchapter.
The descriptions in chapter "V/f characteristic control (VFCplus)" also apply for
the V/f control.
( 125)
Note!
• Ensure that the maximum input frequency of 10 kHz is not exceeded during
execution of the motor control function with speed feedback. Using DI1
and DI2 as frequency inputs ( 259)
• 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.
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