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.
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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