Siemens SINAMICS S120 Function Manual page 266

Vector control
6.16 Fast magnetization for induction motors
Error causes and remedies
Cause
Quick magnetizing (p1401.6) for soft starting (p1401.0)
Quick magnetizing (p1401.6) for flux build-up control
(p1401.2)
Quick magnetization (p1401.6) for Rs identification (stator re‐
sistance identification) after restart (p0621 = 2)
Flux controller output limited
If the current limit p0640[D] is set very low (below the rated magnetizing current value in
p0320[M]), the parameterized flux setpoint p1570 [D] might not be reached at all.
As soon as the time in p0346 (magnetization time) is exceeded, fault F07411 is output.
Generally, the magnetization time is significantly longer than the flux build-up time associated
with quick magnetization.
Error causes and remedies
With quick magnetization configured (p1401.6 = 1), the specified flux setpoint is not reached
even though the current setpoint = 90% of maximum current.
Cause
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. Correct the current limits (p0640, p0323).
Induction motor (encoderless, open-loop control) at I2t limit.
Motor Module rating is too low.
Function diagrams (see SINAMICS S120/S150 List Manual)
● 6491
● 6722
● 6723
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● r0207[0...4]
● p0320[0...n]
● p0346[0...n]
● p0621[0...n]
● p0640[0...n]
● p0644[0...n]
264
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)
Rated power unit current
Motor rated magnetizing current / short-circuit current
Motor excitation build-up time
Stator resistance identification after restart
Current limit
Current limit excitation build-up induction motor
Remedy
● Deactivate smooth starting: p1401.0 = 0
● Deactivate quick magnetization: p1401.6 = 0
● Deactivate flux build-up control: p1401.2 = 0
● Deactivate quick magnetization: p1401.6 = 0
● Change Rs identification parameter settings: p0621 = 0, 1
● Deactivate quick magnetization: p1401.6 = 0
Remedy
Correct the motor data.
Check the motor connection type.
Reduce the load on the induction motor.
● Use a larger Motor Module if necessary.
● Check the motor supply cable.
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions