Using a KTY sensor, the converter monitors the motor temperature and the sensor itself for wire-
break or short-circuit:
• Temperature monitoring:
The converter uses a KTY sensor to evaluate 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 < 50 Ω as a short-circuit and outputs the alarm
A07015. After 100 milliseconds, the converter changes to the fault state with F07016.
Temperature switch
The converter interprets a resistance ≥ 100 Ω as being an open temperature switch and responds
according to the setting of p0610.
PTC sensor
The converter interprets a resistance > 1650 Ω as being an overtemperature condition and
responds according to the setting of 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.
Advanced commissioning
8.23 Motor protection with temperature sensor
Distributed converter for SIMOGEAR geared motors
324 Operating Instructions, 10/2020, FW V4.7 SP13, A5E31298649B AL
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