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.
p0622[0...n]
Motor excitation time for Rs_ident after switching on again / t_excit Rs_id
Access level: 3
Calculated: CALC_MOD_REG Data type: FloatingPoint32
Can be changed: T, U
Scaling: -
Dynamic index: MDS, p0130
Unit group: -
Unit selection: -
Function diagram: -
Min:
0.000 [s]
Max:
20.000 [s]
Factory setting:
0.000 [s]
Description:
Sets the excitation time of the motor for the stator resistance identification after switching on again (restart).
Dependency:
See also: p0621, r0623
Note
For p0622 < p0346 the following applies:
If identification is activated, the magnetizing time is influenced by p0622. The speed is enabled after measurement is
complete, but not before the time in p0346 has elapsed (see r0056 bit 4). The time taken for measurement also depends
on the settling time of the measured current.
For p0622 >= p0346 the following applies:
Parameter p0622 is internally limited to the magnetizing time p0346, so that p0346 represents the maximum possible
magnetizing time during identification. The entire measurement period (magnetizing plus measurement settling time
plus measuring time) will always be greater than p0346.
r0623
Rs identification stator resistance after switch on again / Rs-id Rs aft sw-on
Access level: 4
Calculated: -
Data type: FloatingPoint32
Can be changed: -
Scaling: -
Dynamic index: -
Unit group: -
Unit selection: -
Function diagram: -
Min:
- [ohm]
Max:
- [ohm]
Factory setting:
- [ohm]
Description:
Displays the stator resistance determined using the Rs identification after switching on again.
Dependency:
See also: p0621, p0622
p0625[0...n]
Motor ambient temperature during commissioning / Mot T_ambient
Access level: 3
Calculated: CALC_MOD_EQU Data type: FloatingPoint32
Can be changed: T, U
Scaling: -
Dynamic index: MDS, p0130
Unit group: 21_1
Unit selection: p0505
Function diagram: 8017, 8018
Min:
-40 [°C]
Max:
80 [°C]
Factory setting:
20 [°C]
Description:
Defines the ambient temperature of the motor for calculating the motor temperature model.
Dependency:
See also: p0350, p0354
Note
The parameters for stator and rotor resistance (p0350, p0354) refer to this temperature.
If the thermal I2t motor model is activated for permanent-magnet synchronous motors (refer to p0611), p0625 is
included in the model calculation if a temperature sensor is not being used (see p0601).
Parameters
7.2 Parameter list
SINAMICS G120X converter
554
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
