Siemens SINAMICS G120D List Manual page 245

p1960 Rotating measurement selection / Rot meas sel
Access level: 2
Can be changed: T
Units group: -
Min
0
Description: Sets the rotating measurement.
The rotating measurement is carried out after the next power-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
Danger: For drives with a mechanical system that limits the distance moved, it must be ensured that this is not reached dur-
ing 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 dif-
ferent speed controller adaptations.
p1961 Saturation characteristic speed to determine / Sat_char n determ
Access level: 3
Can be changed: U, T
Units 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
Note: The saturation characteristics should be determined at an operating point with the lowest possible load.
© Siemens AG 2012 - 2013 All Rights Reserved
SINAMICS G120D List Manual (LH14), 01/2013
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 [%]
Parameters
List of parameters
Data type: Integer16
Dyn. index: -
Func. diagram: -
Factory setting
0
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: -
Factory setting
40 [%]
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