Functions, monitoring, and protective functions
9.4 Monitoring and protective functions
Inverter chassis units
484 Operating Instructions, 07/2016, A5E00331449A
Temperature sensor evaluation
Temperature measurement via KTY, PT100 or PT1000
● When the alarm threshold is reached (set via p0604; delivery state after commissioning
120 °C), alarm A07910 is triggered.
Parameter p0610 can be used to set how the drive responds to the alarm triggered:
– 0: No response, only alarm, no reduction of I_max
– 1: Alarm and reduction of I_max and fault (F07011)
– 2: Alarm and fault (F07011), no reduction of I_max
– 12: Alarm and fault (F07011), no reduction of I_max, temperature saved
● When the fault threshold is reached (set via p0605, delivery state after commissioning
155 °C), fault F07011 is triggered in conjunction with the setting in p0610.
Temperature measurement via PTC or bimetallic normally closed contact
● Once the PTC or the bimetallic normally closed contact responds, alarm A07910 is
initiated.
● Fault F07011 is triggered once the waiting time defined in p0606 has elapsed.
Sensor monitoring for wire breakage/short-circuit
A sensor monitoring function for a short-circuit in the sensor cable is possible for a PTC and
a KTY84 . Wire breakage monitoring is possible for a KTY84 sensor:
If the temperature of the motor temperature monitor is outside the range -140 to +250 °C,
then the sensor cable is broken or has a short-circuit – and Alarm A07015 "Motor
temperature sensor alarm" is triggered. Fault F07016 (“Drive: Motor temperature sensor
fault”) is triggered once the waiting time defined in p0607 has elapsed.
Fault F07016 can be suppressed using p0607 = 0. If an induction motor is connected, the
drive continues operating with the data calculated in the thermal motor model.
If the system detects that the motor temperature sensor set in p0600 is not connected, alarm
A07820 "Temperature sensor not connected" is triggered.
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