Siemens SINAMICS G120 List Manual page 306

2 Parameters
2.2 List of parameters
The identification of the q leakage inductance can only be carried out for unloaded motors or motors with a low load
(load approx. 30% below the rated motor torque). Only then is a current controller adaptation (p0391 ... p0393)
parameterized if the q-leakage inductance under no-load conditions is at least 30 % higher than the total leakage
inductance (p0356, p0358).
p1960 Rotating measurement selection / Rot meas sel
Access level: 2
Can be changed: T
Unit group: -
Min
0
Description: Sets the rotating measurement.
The rotating measurement is carried out after the next switch-on command.
The setting possibilities of the parameter depend on the open-loop/closed-loop control mode (p1300).
p1300 < 20 (U/f open-loop control):
It is not possible to select rotating measurement or speed controller optimization.
p1300 = 20, 22 (encoderless operation):
Only rotating measurement or speed controller optimization can be selected in the encoderless mode.
p1300 = 21, 23 (operation with encoder):
Both versions (encoderless and with encoder) of the rotating measurement and speed controller optimization can be
selected.
Value: 0:
1:
2:
3:
4:
Dependency: Before the rotating measurement is carried out, the motor data identification routine (p1900, p1910, r3925) should
have already been done.
When selecting the rotating measurement, the drive data set changeover is suppressed.
Refer to: p1300, p1900, p1959, p1967, r1968
Danger: For drives with a mechanical system that limits the distance moved, it must be ensured that this is not reached during
the rotating measurement. If this is not the case, then it is not permissible that the measurement is carried out.
Notice: If there is a motor holding brake, it must be open (p1215 = 2).
To permanently accept the determined settings they must be saved in a non-volatile fashion (p0971).
During the rotating measurement it is not possible to save the parameter (p0971).
Note: When the rotating measurement is activated, it is not possible to save the parameters (p0971).
Parameter changes are automatically made for the rotating measurement (e.g. p1120); this is the reason that up to
the end of the measurement, and if no faults are present, no manual changes should be made.
The ramp-up and ramp-down times (p1120, p1121) are limited, for the rotating measurement, to 900 s.
For speed controller optimization with encoder (p1960 = 2, 4), the speed controller for encoderless operation is also
pre-assigned (p1470, p1472).
Depending on whether the speed controller optimization is carried out with or without encoder, different Kp/Tn
adaptations of the speed controller are set (p1464, p1465). If the drive should be controlled with as well as without
speed encoder, then we recommend the use of two drive data sets (p0180). These can then be executed with
different speed controller adaptations.
p1961 Saturation characteristic speed to determine / Sat_char n determ
Access level: 3
Can be changed: U, T
Unit group: -
Min
26 [%]
Description: Sets the speed to determine the saturation characteristic.
The percentage value is referred to p0310 (rated motor frequency).
Dependency: Refer to: p0310, p1959
Refer to: F07983
306
Inhibited
Rotating measurement in encoderless operation
Rotating measurement with encoder
Speed controller optimization in encoderless operation
Speed controller optimization with encoder
Calculated: -
Scaling: -
Unit selection: -
Max
4
Calculated: -
Scaling: -
Unit selection: -
Max
75 [%]
Data type: Integer16
Dyn. index: -
Func. diagram: -
Factory setting
0
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: -
Factory setting
40 [%]
SINAMICS G120 CU250S-2 Control Units
List Manual, 09/2017, A5E33842890