Bimetallic switch
The converter interprets a resistance ≥ 100 Ω as an opened bimetallic switch and responds
according to the setting for p0610.
PTC sensor
The converter interprets a resistance > 1650 Ω as being an overtemperature and responds
according to the setting for p0610.
The converter interprets a resistance < 20 Ω as being a short-circuit and responds with alarm
A07015. If the alarm is present for longer than 100 milliseconds, the converter shuts down with
fault F07016.
Pt1000 sensor
Using a Pt1000 sensor, the converter monitors the motor temperature and the sensor itself for
wire breakage and/or short-circuit:
● Temperature monitoring:
Using a Pt1000 sensor, the converter evaluates the motor temperature in the range from
-48 °C ... +248 °C.
Set the temperature for the alarm and fault thresholds with parameter p0604 or p0605.
– Overtemperature alarm (A07910):
- motor temperature > p0604 and p0610 = 0
– Overtemperature fault (F07011):
The converter responds with a fault in the following cases:
- motor temperature > p0605
- motor temperature > p0604 and p0610 >0
● Sensor monitoring (A07015 or F07016):
– Wire-break:
The converter interprets a resistance > 2120 Ω as a wire-break and outputs the alarm
A07015. After 100 milliseconds, the converter changes to the fault state with F07016.
– Short-circuit:
The converter interprets a resistance < 603 Ω as a short-circuit and outputs the alarm
A07015. After 100 milliseconds, the converter changes to the fault state with F07016.
Parameters
Number Name Factory setting
p0335[M] Type of motor cooling 0
p0601[M] Motor temperature sensor type 0
p0604[M] Mot_temp_mod 2/sensor alarm threshold 130 °C
p0605[M] Mot_temp_mod 1/2/sensor threshold and temperature value 145 °C
p0610[M] Motor overtemperature response 12
p0640[D] Current limit 0 Arms
Advanced commissioning
6.7 Drive protection
SINAMICS G120XA converter
306 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
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