
Parameters 195
Defines, together with
, the maximum allowed
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
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
fault.
15.00 Hz
0.00…10000.00 Hz
Overfrequency trip margin.
See par.
31.32 Emergency ramp supervision
and
31.33 Emergency ramp supervision delay
, together
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
. Otherwise,
defines the maximum allowed deviation from the
expected deceleration rate, which is calculated from
parameters
(Off1) or
(Off3). If the actual deceleration rate
(
24.02
) deviates too much from the expected rate, the
drive trips on
, sets bit 8
of
, and coasts to a stop.
If
is set to 0 s, the
emergency stop ramp supervision is disabled.
See also parameter
0%
0…300%
Maximum deviation from expected deceleration rate. 1 = 1%
No.
Name/Value
Description
Default
FbEq 16
Frequency
Time
Overfrequency trip level
Overfrequency trip level
ABS(
ABS(
Summary of Contents for ACS280
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Page 20: ...20 Start up ID run and use ...
Page 24: ...24 Default control connection ...
Page 88: ...88 Program features ...
Page 298: ...298 Parameters ...