Siemens MICROMASTER 440 Operating Instructions Manual page 109

Issue 10/06
A high thermal motor load and when the line supply is frequently switched-
out/switched-in requires, for closed-loop vector control
− that a KTY84 sensor is used, or
− an external 24V power supply voltage is connected
Motor cooling (Selects motor cooling system used)
P0335 = ...
0 Self-cooled: Using shaft mounted fan attached to motor
1 Force-cooled: Using separately powered cooling fan
2 Self-cooled and internal fan
3 Force-cooled and internal fan
Motor temperature sensor
P0601 = ...
Selects the motor temperature sensor.
0 No sensor
1 PTC thermistor (PTC)
2 KTY84
When "no sensor" or "PTC thermistor (PTC)" is selected, the motor temperature is
determined on the basis of the value estimated by the thermal motor model.
5 V
ADC
PTC
KTY
Alarm threshold, motor overtemperature
P0604 = ...
Defines the alarm threshold for the motor overtemperature protection. This threshold, where
either a shutdown (trip) or Imax reduction is initiated (P0610) always lies 10 % above the
alarm threshold.
ϑ = ⋅
1.1
trip
The alarm threshold should be at least 40 °C greater than the ambient temperature P0625.
P0604 ≥ P0625 + 40 °C
Inverter temperature reaction
P0610 = ...
Defines reaction when motor temperature reaches warning threshold.
0 No reaction, warning only
1 Warning and I
2 Warning and trip (F0011)
Motor overload factor [%]
p0640 = ...
Defines motor overload current limit in [%] relative to p0305 (rated motor current). Limited to
maximum inverter current or to 400 % of rated motor current (p0305), whichever is the
lower.
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
Fault
F0015
T = 4 s
1
Signal
loss
detection
P0601
Equivalent
circuit data
Power dissipation
P
V,mot
ϑ
ϑ = ⋅
1.1 P0604
warn warn
ϑ
trip
reduction (results in a lower output frequency)
max
P0601 = 2
&
No sensor
0
PTC
1
KTY
2
ϑ
V
Thermal
r0631
motor
r0632
model
r0633
:
Warning threshold (P0604)
: Trip threshold (max. permissible temperature)
3 Functions
0
0
r0052
Bit13
1
Motor
≥ 1
temp.
0
reaction
r0035
1 P0610
0
P0604
130.0 °C
2
150.0 %
109