Siemens CU240B-2 - Page 270

Advanced commissioning
6.6 Protection functions
Converter with the CU240B-2 and CU240E-2 Control Units
270 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
Thermal motor model 2 for induction motors
The thermal motor model 2 for induction motors is a thermal 3-mass model, consisting of
stator core, stator winding and rotor.
Image 6-43 Thermal motor model 2 for induction motors
Table 6- 37 Thermal motor model 2 for induction motors
Parameter
Description
r0068
CO: Absolute actual current value
p0610
Motor overtemperature response (factory setting: 12)
0: No response, alarm only, no reduction of I
max
1:
Messages, reduction of I
max
2: Messages, no reduction of I
max
12:
Messages, no reduction of I
max
, temperature is saved
p0344
Motor weight (for thermal motor type) (factory setting: 0.0 kg)
After selecting an
induction motor
(p0300) or a listed
induction motor
(p0301) during the
commissioning,
the inverter sets
the parameters to
values appropriate
for the motor.
The parameters
are write-
protected for listed
motors
(p0301 ≥ 0).
p0604
Mot_temp_mod 2/KTY alarm threshold
(factory setting: 130.0° C)
Motor temperature > p0604 ⇒ fault F07011.
p0605
Mot_temp_mod 1/2 threshold
(factory setting: 145.0° C)
Motor temperature > p0605 ⇒ alarm A07012.
p0612
Mot_temp_mod activation
.01 1 signal: Activate motor temperature model 2 for induction
motors
.09 1 signal: Activate motor temperature model 2 expansions
The inverter sets bit 09 = 1 after commissioning. If you load
the parameter settings for firmware version ≤ V4.6 into the
inverter, bit 09 = 0 remains.
p0627
Motor overtemperature, stator winding (factory setting: 80 K)
p0625
Motor ambient temperature during commissioning
(factory setting: 20° C)
Specification of the motor ambient temperature in °C at the instant of the motor data
identification.
r0632
Mot_temp_mod stator winding temperature [°C]
Further information is provided in the function charts 8016 and 8017 of the List Manual.