Siemens SINAMICS S120 Function Manual page 265

Commissioning the function
Parameter p1401.6 = 1 (flux control configuration) must be set to activate quick magnetization.
This setting initiates the following sequence during motor starting:
● The maximum excitation build-up current of the induction motor (in reference to the
permitted rated power module current (r0207[0])) is set with parameter p0644 ("Current limit
excitation build-up induction motor").
● The field-generating current setpoint jumps to the value parameterized in p0644 or the
maximum of I
● The flux increases as fast as physically possible with the specified current.
● The flux setpoint r0083 is made to follow accordingly.
● As soon as the flux threshold value programmed in p1573 is reached (min. 10% and max.
200%, factory setting 100%), excitation is ended and the speed setpoint is enabled. The flux
threshold value must not be set too low for a large load because the torque-producing
current is limited during magnetization.
Note
The flux threshold value set in parameter p1573 is effective only if the actual flux during
magnetization reaches the value programmed in p1573 before the time set in p0346.
● The flux is increased further until the flux setpoint in p1570 has been reached.
● The field-producing current setpoint is reduced by means of a flux controller with P gain
(p1590) and the parameterized smoothing factor (p1616).
Important notes
When quick magnetization is selected (p1401.6 = 1), smooth starting is deactivated internally
and alarm A07416 displayed.
When the stator resistance identification function is active (see p0621 "Identification of stator
resistance after restart") is active, quick magnetization is deactivated internally and alarm
A07416 displayed.
The parameter (p1401.6 = 1) does not work when combined with the "flying restart" function
(see p1200), i.e. flying restart is performed without quick magnetization.
Alarms and faults
Flux controller configuration
When a function controlled using parameters p1401 and p0621 is activated, it is checked
whether another function that is in conflict with the function to be activated is selected. If this is
the case, alarm A07416 is displayed together with the parameter number that is incompatible
with the configuration (i.e. p0621 or p1401). The number of the dataset in the alarm value is also
be displayed. The following applies:
● p1401 is DDS-dependent
● p0621 is MDS-dependent
The configuration of the flow control (p1401) has inconsistencies.
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
= 0.9 · r0067 (upper limit field-generating current setpoint).
max
6.16 Fast magnetization for induction motors
Vector control
263