Siemens SINAMICS G120D Operating Instructions Manual page 185

Thermal motor model 3 for encoderless synchronous motors
The thermal motor model 3 for encoderless synchronous motors 1FK7 or 1FG1 is a thermal
3-mass model, consisting of stator core, stator winding and rotor.
Image 6-36
Table 6- 29
Parameter Description
r0034
r0063
r0068
p0610
p0612
p5390
p5391
p0613
p0625
r0632
Further information is provided in the function charts 8016 and 8017 of the List Manual.
Converter with control units CU240D-2
Operating Instructions, 07/2016, FW V4.7 SP6, A5E34262100B AD
Thermal motor model 3 for 1FK7 encoderless synchronous motors
Thermal motor model 3 for 1FK7 encoderless synchronous motors
CO: Thermal motor load [%]
CO: Actual speed value [rpm]
CO: Actual current value [A]
Motor overtemperature response (factory setting: 12)
0: No response, alarm only, no reduction of I
1: Messages, reduction of I
2: Messages, no reduction of I
12: Messages, no reduction of I
Mot_temp_mod activation
.02 1 signal: Activate motor temperature
model 3 for 1FK7 or 1FG1 encoderless
synchronous motors
Mot_temp_mod 1/3 alarm threshold (factory
setting: 110.0° C)
Motor temperature > p5390 ⇒ alarm A07012.
Mot_temp_mod 1/3 fault threshold (factory
setting: 120.0° C)
Motor temperature > p5391
or
motor temperature > p5390, longer than a mo-
tor-dependent time calculated by the inverter
⇒ fault F07011.
Mot_temp_mod 1/3 ambient air temperature (factory setting: 20° C)
Expected motor ambient temperature in °C for motor operation.
Motor ambient temperature during commissioning (factory setting: 20° C)
Motor ambient temperature in °C at the instant of the motor data identification.
Mot_temp_mod stator winding temperature [°C]
max
max
max
, temperature is saved
max
After selecting an encoderless syn-
chronous motor 1FK7 or 1FG1 (p0300)
or a listed induction motor (p0301)
during the commissioning, the inverter
sets thermal motor model 3 and the
parameters to values appropriate for
the motor type.
The parameters are write-protected for
listed motors (p0301 ≥ 0).
Advanced commissioning
6.6 Protection functions
185