Siemens sinamics G120 Operating Instructions Manual page 259
Low voltage inverters chassis devices with cu250s-2 control units and encoder evaluation
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- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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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 6-48
Table 6- 38
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 CU250S-2 Control Unit
Operating Instructions, 01/2016, FW V4.7 SP6, A5E31759476B AE
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
259
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