ABB ACS280 Firmware Manual page 195

No. Name/Value
31.31 Frequency trip margin
0.00...10000.00 Hz
31.32 Emergency ramp
supervision
0...300%
Description
Defines, together with
30.14 Maximum frequency
frequency of the motor (overfrequency protection).
The absolute value of this overfrequency trip level is
calculated by adding the value of this parameter to
the higher of the absolute values of
frequency 30.14 Maximum frequency
and
If the output frequency (
exceeds the overfrequency trip level (ie. the absolute
value of the output frequency exceeds the absolute
value of the overfrequency trip level), the drive trips
73F0 Overfrequency
on the
Frequency
Overfrequency trip level
31.31
ABS(
ABS(
31.31
Overfrequency trip level
Overfrequency trip margin.
31.32 Emergency ramp supervision
Parameters
31.33 Emergency ramp supervision delay
24.02 Used speed feedback
with the derivative of
provide a supervision function for emergency stop
modes Off1 and Off3.
The supervision is based on either
• observing the time within which the motor stops,
or
• comparing the actual and expected deceleration
rates.
If this parameter is set to 0%, the maximum stop time
is directly set in parameter
defines the maximum allowed deviation from the
expected deceleration rate, which is calculated from
23.11 23.15
parameters ...
stop time
(Off3). If the actual deceleration rate
24.02
( ) deviates too much from the expected rate, the
73B0 Emergency ramp failed
drive trips on
06.17 Drive status word 2
of
31.32
If is set to 0% and
emergency stop ramp supervision is disabled.
21.04 Emergency stop mode
See also parameter
Maximum deviation from expected deceleration rate.
30.13 Minimum frequency
, the maximum allowed
30.13 Minimum
.
01.06 Output frequency
fault.
30.14
30.14
)
30.14
)
30.13
, together
31.33 31.32
. Otherwise,
23.23 Emergency
(Off1) or
, sets bit 8
, and coasts to a stop.
31.33
is set to 0 s, the
Parameters 195
Default
FbEq 16
and 15.00 Hz
)
Time
See par.
46.02
and 0%
,
.
1 = 1%