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Description of the Software Modules and Parameters
Parameter manual
b maXX
BM3000
Document no.: 5.12001.07
731
4
4.11.4 Temperature monitoring of the motor
Three different encoder types can be utilized:
m
KTY84/130 (PTC with an almost linear characteristic for precise evaluation of the tem-
perature)
m
Temperature switch (motor protection thermistor (PTC) conforming to DIN 44080-082)
m
PT1000 (PTC with linear characteristic)
The selection is made using Parameter
Temperature Sensor Type. On motors
which have an encoder with an electronic identification plate, the appropriate value is en-
tered at switch-on. On motors without an electronic identification plate, the encoder type
must be entered.
With the KTY84/130 and PT1000 temperature encoders, the current motor temperature
in °C is ascertained (displayed in parameter
) and then checked against the two
temperature warning thresholds (
and
) and if they are exceeded, Warn-
ing 710 or 711 is issued. If the switch-off threshold is exceeded, Error 709 "Motor Over-
temperature Detected" is generated. The switch-off threshold in effect is displayed in
Parameter
. On motors with an electronic identification plate, the appropriate
value is entered at switch-on. The standard value for Baumüller motors is normally 150°C.
With the temperature switch, the temperature value determined is compared to an inter-
nal permanently set switch-off threshold. This switch-off threshold corresponds to a resis-
tance value of 1100 ohms. If it is exceeded, Error 714 "Motor Overtemperature Detected
by Temperature Switch" is generated.
The temperature encoder can be connected either to the encoder input or to the connec-
tor X101 provided on the power unit. The setting for the connection is made in Parameter
Temperature acquisition system.
4.11.5 Overload monitoring of the motor (I
2
t)
4.11.5.1 General information
I
2
t model
The overload monitoring protects the motor from thermal overload. Thereby, the tempera-
ture of the motor is emulated and monitored by l
2
t model.
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