Siemens SINAMICS S120 Installation And Start-Up Manual page 267

Temperature measurement via KTY
The device is connected to terminals X522:7 (anode) and X522:8 (cathode) on the
terminal block (TM31) in the forward direction of the diode. The measured
temperature is limited to between –48 _C and +248 _C and is made available for
further evaluation.
S Set the KTY temperature sensor type: p4100 = 2
S Activate motor temperature measurement via the external sensor: p0600 = 10
S When the alarm threshold is reached (set via p0604; factory setting: 120 _C),
alarm A7910 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 with reduction of I_max and fault (F7011)
– 2: Alarm and fault (F7011), no reduction of I_max
S When the fault threshold is reached (set via p0605), fault F7011 is triggered in
conjunction with the setting in p0610.
Temperature measurement via PTC
The device is connected, for example, to terminal X522:7/8 on the terminal block
(TM31). The threshold value 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 evalua-
tion.
S Set the KTY temperature sensor type: p4100 = 1
S Activate motor temperature measurement via the external sensor: p0600 = 10
S Alarm A7910 is triggered once the PTC responds.
S Fault F7011 is triggered once the waiting time defined in p0606 has elapsed.
Sensor monitoring for cable 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 A07915 ("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 con-
nected, alarm A07820 ("Temperature sensor not connected") is triggered.
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
Basic Information about the Drive System
Monitoring and protective functions
7-267