User Manual

Parameters
List of parameters
1-82
© Siemens AG 2008 - 2013 All Rights Reserved
SINAMICS G120 CU230P-2 Control Units List Manual (LH9), 01/2013
For p0620 = 2, the following applies:
The stator resistance is adapted using the temperature in r0035. If applicable, the rotor temperature for adapting
the rotor resistance is calculated from the stator temperature (r0035) as follows:
theta_R = (r0628 + r0625) / (r0627 + r0625) * r0035
Description: Selects the identification of the stator resistance after booting the Control Unit (only for vector control).
The identification is used to measure the actual stator resistance and from the ratio of the result of motor data iden-
tification (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 powered up for the first time (pulse enable) after booting
the Control Unit.
p0621 = 2:
Identification of the stator resistance every time the drive is powered up (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.
Refer to: p0622, r0623
Notice: The calculated stator temperature can only be compared with the measured value of a temperature sensor (KTY) 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) 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.
Description: Selects the identification of the stator resistance after booting the Control Unit (only for vector control).
The identification is used to measure the actual stator resistance and from the ratio of the result of motor data iden-
tification (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 powered up for the first time (pulse enable) after booting
the Control Unit.
p0621[0...n] Identification stator resistance after restart / Rst_ident Restart
PM230
PM240
PM250, PM260
Access level: 2 Calculated: - Data type: Integer16
Can be changed: C(3), T Scaling: - Dyn. index: MDS, p0130
Units group: - Unit selection: - Func. diagram: -
Min Max Factory setting
0 2 0
p0621[0...n] Identification stator resistance after restart / Rst_ident Restart
PM330 Access level: 2 Calculated: - Data type: Integer16
Can be changed: C(3), T Scaling: - Dyn. index: MDS, p0130
Units group: - Unit selection: - Func. diagram: -
Min Max Factory setting
0 2 0