Siemens SINAMICS S120 Function Manual page 217

Cause:
With quick magnetization configured (p1401.6 = 1), the specified flux setpoint is not reached
even though the current setpoint = 90% of maximum current.
● Motor data is incorrect.
● Motor data and motor connection type (star/delta) do not match.
● Current limit in p0640 is set too low for the motor concerned.
● Induction motor (encoderless, open-loop control) at I2t limit.
● Motor Module rating is too low.
Remedy:
● Correct the motor data.
● Check the motor connection type.
● Correct the current limits (p0640, p0323).
● Reduce the load on the induction motor.
● Use a larger Motor Module if necessary.
● Check the motor supply cable.
Function diagrams (see SINAMICS S120/S150 List Manual)
• 6491
• 6722
• 6723
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• p0320 [0...n]
• p0346
• p0621[0...n]
• p0640[0...n]
• p1401[0...n]
• p1570[0...n]
• p1573[0...n]
• p1590[0...n]
• p1616[0...n]
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Vector control - Flux control configuration
Vector control - Field weakening characteristic, Id setpoint (ASM, p0300 = 1)
Vector control - Field weakening controller, flux controller (ASM, p0300 = 1)
Motor rated magnetizing current / short-circuit current
Motor excitation build-up time
Stator resistance identification after restart
Current limit
Flux control configuration
CO: Flux setpoint
Flux threshold value magnetization
Flux controller P gain
Current setpoint smoothing time
4.16 Quick magnetization for induction motors
Vector control
215