Siemens SINAMICS S120 Function Manual page 353

● When the alarm threshold is reached (set via p0604; factory setting: 120°C), alarm A7910
● When the fault threshold is reached (set via p0605), fault F07011 is triggered in
Temperature measurement via PTC
The sensor is connected to terminal X522:7/8 on the terminal block (TM31). The threshold
for switching to an alarm or fault is 1650 Ω. If the threshold is exceeded, the system switches
internally from an artificially generated temperature value of -50 °C to +250°C and makes it
available for further evaluation.
● Set the PTC temperature sensor type: p0601 = 1
● Activate motor temperature measurement via the external sensor: p0600 = 10
● Alarm A07910 is triggered once the PTC responds.
● Fault F07011 is triggered once the waiting time defined in p0606 has elapsed.
Sensor monitoring for wire breakage/short-circuit
If the temperature of the motor temperature monitor is outside the range -50 °C to +250°C,
the sensor cable is broken or has short-circuited. Alarm A07015 ("Alarm: temperature sensor
fault") is triggered. Fault F07016 ("Fault: temperature sensor fault") is triggered once the
waiting time defined in p0607 has elapsed.
Fault F07016 can be suppressed by 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.
Thermal motor monitoring with the I
2xxxx)
Activation
Thermal I
thermal winding time constant of the motor has been entered in p0611. When an MDS is
switched over, note the entry for the motor number in P0826.
Function
When the I
Normalization r0034:
0 % corresponds to 40°C
100% corresponds to p0605[M] (motor overtemperature fault threshold)
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
is triggered.
Parameter p0610 can be used to set how the drive responds to the alarm triggered:
– 0: No response, alarm only, 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
conjunction with the setting in p0610.
t motor model for synchronous motors (p0300 = 2xx, p0301 =
2
t motor monitoring is activated by setting p0612.0=1. This is possible only if the
2
t motor model is active, the current motor load can be read via r0034.
2
Monitoring and protective functions
8.5 Thermal motor monitoring
353