Siemens Sinamics S120 Function Manual page 94

Servo control
3.9 V/f control
Note
The operation of synchronous motors with V/f control is allowed only at up to 25 % of the
rated motor speed.
Structure of V/f control
Figure 3-16
Prerequisites for V/f control
● First commissioning has been carried out:
● First commissioning has not been carried out:
92
Structure of V/f control
The parameters for V/f control have been initialized with appropriate values.
The following relevant motor data must be checked and corrected:
– r0313 Motor pole pair number, actual (or calculated)
– p0314 Motor pole pair number
– p1318 V/f control ramp-up/ramp-down time
– p1319 V/f control voltage at zero frequency
– p1326 V/f control programmable characteristic frequency 4
– p1327 V/f control programmable characteristic voltage 4
– p1338[0...n] V/f mode resonance damping gain
– p1339[0...n] V/f mode resonance damping filter time constant
– p1349[0...n] V/f mode resonance damping maximum frequency
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions