Siemens Sinamics S120 Function Manual page 96

Servo control
3.9 V/f control
V/f characteristic
The speed setpoint is converted to the frequency specification taking into account the
number of pole pairs. The synchronous frequency associated with the speed setpoint is
output (no slip compensation).
Figure 3-17
Function diagrams (see SINAMICS S120/S150 List Manual)
● 5300 V/f control
● 5650 Vdc_max controller and Vdc_min controller
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● p0304[0...n] Rated motor voltage
● p0310[0...n] Rated motor frequency
● p0311[0...n] Rated motor speed
● r0313[0...n] Motor pole pair number, actual (or calculated)
● p0314[0...n] Motor pole pair number
● p0317[0...n] Motor voltage constant
● p0322[0...n] Maximum motor speed
● p0323[0...n] Maximum motor current
● p0640[0...n] Current limit
● p1082[0...n] Maximum speed
● p1317[0...n] V/f control activation
● p1318[0...n] V/f control ramp-up/ramp-down time
● p1319[0...n] V/f control voltage at zero frequency
● p1326[0...n] V/f control programmable characteristic frequency 4
● p1327[0...n] V/f control programmable characteristic voltage 4
94
V/f characteristic
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions