Programmable Protection Functions - ABB ACS880 Firmware Manual

64 Program features
The figure and table below show typical KTY84 sensor resistance values as a
function of the motor operating temperature.
KTY84 scaling
90 °C = 936 ohm
110 °C = 1063 ohm
130 °C = 1197 ohm
150 °C = 1340 ohm
It is possible to adjust the motor temperature supervision limits and select how the
drive reacts when overtemperature is detected.
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.
Settings
Parameter group 35 Motor thermal protection
settings (page 283).


Programmable protection functions

External events (parameters 31.01...31.10)
Five different event signals from the process can be connected to selectable inputs to
generate trips and warnings for the driven equipment. When the signal is lost, an
external event (fault, warning, or a mere log entry) is generated. The contents of the
messages can be edited on the control panel by selecting Menu - Settings - Edit
texts.
Ohm
3000
2000
1000
0
-100 0
(page 213) and
100 200 300
91 Encoder module
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T C