Siemens SINAMICS G120 List Manual page 132

2 Parameters
2.2 List of parameters
Notice: When selecting a catalog motor (p0301), this parameter is automatically pre-assigned and is write protected.
Information in p0300 should be carefully observed when removing write protection.
Note: The hysteresis is 2 K.
p0620[0...n] Thermal adaptation, stator and rotor resistance / Mot therm_adapt R
Access level: 4
Can be changed: C(3), U, T
Unit group: -
Min
0
Description: Sets the thermal adaptation of the stator/primary section resistance and rotor/secondary section resistance according
to r0395 and r0396.
Value: 0:
1:
2:
Note: For p0620 = 1, the following applies:
The stator resistance is adapted using the temperature in r0035 and the rotor resistance together with the model
temperature in r0633.
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
p0621[0...n] Identification stator resistance after restart / Rst_ident Restart
Access level: 2
Can be changed: C(3), T
Unit group: -
Min
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).
p0621 = 3: only for synchronous motors
One-time identification of the cable resistance p0352 without any change in the thermal motor model.
Value: 0:
1:
2:
3:
Dependency: p0621 = 1, 2: only for induction motors
- perform motor data identification (see p1910) with cold motor.
- enter ambient temperature at time of motor data identification in p0625.
p0621 = 3: only for synchronous motors
- enter the stator resistance in p0350.
- switch-on with the motor cold
Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Refer to: p0622, r0623
132
No thermal adaptation of stator and rotor resistances
Resistances adapted to the temperatures of the thermal model
Resistances adapted to the measured stator winding temperature
No Rs identification
Rs identification after switching-on again
Rs identification after switching-on each time
Rcable identification once only (only PMSM)
Calculated: p0340 = 1
Scaling: -
Unit selection: -
Max
2
Calculated: -
Scaling: -
Unit selection: -
Max
3
Data type: Integer16
Dyn. index: MDS
Func. diagram: -
Factory setting
1
Data type: Integer16
Dyn. index: MDS, p0130
Func. diagram: -
Factory setting
0
SINAMICS G120 CU250S-2 Control Units
List Manual, 09/2017, A5E33842890