Siemens SINAMICS S120 Function Manual page 86

Servo control
3.9 V/f control for diagnostics
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 3-15
Function diagrams (see SINAMICS S List Manual)
● 5300 V/f control for diagnostics
Overview of key parameters (see SINAMICS S List Manual)
● p0304 rated motor voltage
● p0310 rated motor frequency
● p0311 rated motor speed
● r0313 Motor pole pair number, actual (or calculated)
● p0314 motor pole pair number
● p031 Motor voltage constant
● p0322 Maximum motor speed
● p0323 Maximum motor current
● p0640 current limit
● p1082 Maximum speed
● p1317 V/f control diagnostics activation
● 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
86
V/f characteristic
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions