Siemens SINAMICS G120XA, Руководство по эксплуатации

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p0621[0...n] Identification stator resistance after restart / Rst_ident Restart
Access level: 2 Calculated: - Data type: Integer16
Can be changed: T Scaling: - Dynamic index: MDS, p0130
Unit group: - Unit selection: - Function diagram: -
Min:
0 Max:
2 Factory setting:
0
Description: Selects the identification of the stator resistance of induction motors after the Control Unit runs-up (only for vector
control).
The identification is used to measure the actual stator resistance and from the ratio of the result of motor data
identification (p0350) to the matching ambient temperature (p0625) the actual mean temperature of the stator winding
is calculated. The result is used to initialize the thermal motor model.
p0621 = 1:
Identification of the stator resistance only when the drive is switched on for the first time (pulse enable) after booting
the Control Unit.
p0621 = 2:
Identification of the stator resistance every time the drive is switched on (pulse enable).
Value: 0: No Rs identification
1: Rs identification after switching-on again
2: Rs identification after switching-on each time
Dependency: - perform motor data identification (see p1910) with cold motor.
- enter ambient temperature at time of motor data identification in p0625.
See also: p0622
NOTICE
The determined stator temperature of the induction motor can only be compared with the measured value of a
temperature sensor (KTY/PT1000) to a certain extent, as the sensor is usually the warmest point of the stator winding,
whereas the measured value of identification reflects the mean value of the stator winding.
Furthermore this is a short-time measurement with limited accuracy that is performed during the magnetizing phase
of the induction motor.
Note
The measurement is carried out:
- For induction motors
- When vector control is active (see p1300)
- if a temperature sensor (KTY/PT1000) has not been connected
- When the motor is at a standstill when switched on
When a flying restart is performed on a rotating motor, the temperatures of the thermal motor model are set to a third
of the overtemperatures. This occurs only once, however, when the CU is booted (e.g. after a power failure).
If identification is activated, the magnetizing time is determined via p0622 and not via p0346. Quick magnetizing
(p1401.6) is de-energized internally and alarm A07416 is displayed. The speed is enabled after completion of the
measurement.
p0621[0...n] Identification stator resistance after restart / Rst_ident Restart
CUG120XA_USS
(PM330)
Access level: 2 Calculated: - Data type: Integer16
Can be changed: T Scaling: - Dynamic index: MDS, p0130
Unit group: - Unit selection: - Function diagram: -
Min:
0 Max:
2 Factory setting:
0
Parameters
7.3 Parameters
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
421