ABB ACS880-x04, Руководство по прошивке

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82 Program features
The analog output feeds a constant excitation current of 2.0 mA through the sensor.
The sensor resistance increases as the motor temperature rises, as does the voltage
over the sensor. The temperature measurement function reads the voltage through
the analog input and converts it into degrees Celsius.
FEN-xx encoder interfaces (optional) also have a connection for one KTY84 sensor.
The figure and table below show typical KTY84 sensor resistance values as a
function of the motor operating temperature.
The warning and fault limits can be adjusted by parameters.
For the wiring of the sensor, refer to the Hardware Manual of the drive.
Motor fan control logic (parameters 35.100 … 35.106 )
If the motor has an external cooling fan, it is possible to use a drive signal (for
example, running/stopped) to control the starter of the fan via a relay or digital output.
A digital input can be selected for fan feedback. A loss of the feedback signal will
optionally cause a warning or a fault.
Start and stop delays can be defined for the fan. In addition, a feedback delay can be
set to define the time within which feedback must be received after the fan starts.
Ex motor support (parameter 95.15 , bit 0)
The control program has a temperature protection function for Ex motors located in a
potentially explosive atmosphere. The protection is enabled by setting bit 0 of
parameter
95.15 Special HW settings .
1000
2000
3000
Ohm
T
o
C
KTY84 scaling
90 °C = 936 ohm
110 °C = 1063 ohm
130 °C = 1197 ohm
150 °C = 1340 ohm
-100
0
0 100 200 300