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).

8>9@

9

S

S

S

I>V@

Figure 3-15 V/f characteristic

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

Drive Functions

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

Page 86
Image 86
Efficient Networks S120 manual Characteristic, Servo control V/f control for diagnostics