Advanced commissioning
7.15 Motor temperature monitoring using a temperature sensor
SIMATIC ET 200pro FC-2 converter
178
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257324B AF
PT1000 sensor
Using a PT1000 sensor, the inverter monitors the motor temperature and the sensor
itself for wire-break or short-circuit:
●
Temperature monitoring:
The inverter uses a PT1000 sensor to evaluate the motor temperature in the range from -
48° C ... +248° C.
Use the p0604 or p0605 parameter to set the temperature for the alarm and fault
threshold.
–
Overtemperature alarm (A07910):
- motor temperature > p0604 and p0610 = 0
–
Overtemperature fault (F07011):
The inverter 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 inverter interprets a resistance > 2120
Ω
as a wire-break and responds with the
alarm A07015. After 100 milliseconds, the inverter responds with fault F07016.
–
Short-circuit:
The inverter interprets a resistance < 603
Ω
as a short-circuit and responds with alarm
A07015. After 100 milliseconds, the inverter responds with a fault.
Setting parameters for the temperature monitoring
Parameter
Description
p0335
Motor-cooling method (factory setting: 0)
0: Natural cooling - with fan on the motor shaft
1: Forced ventilation - with a separately driven fan
2: Liquid cooling
128: No fan
p0601
Motor temperature sensor type
0: No sensor (factory setting)
1: PTC
2: KTY84
4: Temperature switch
6: PT1000
p0604
Mot_temp_mod 2 / sensor alarm threshold (factory setting 130° C)
For monitoring the motor temperature with KTY84/PT1000.
p0605
Mot_temp_mod 1/2 / sensor threshold and temperature value (factory setting: 145° C)
For monitoring the motor temperature with KTY84/PT1000.
