ABB ACS880 Firmware Manual page 275

No. Name/Value
31.30 Overspeed trip
margin
0.00 ... 10000.0
rpm
31.32 Emergency ramp
supervision
0...300%
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Description
Defines, together with 30.11 Minimum speed
Maximum speed, the maximum allowed speed of the motor
(overspeed protection). If 90.01 Motor speed for control
estimated speed exceeds the speed limit defined by
parameter 30.11 or 30.12
parameter, the drive trips on the
Example: If the maximum speed is 1420 rpm and speed trip
margin is 300 rpm, the drive trips at 1720 rpm.
Speed (90.01)
Overspeed trip level
31.30
0
31.30
Overspeed trip level
Overspeed trip margin.
Parameters 31.32 Emergency ramp supervision
Emergency ramp supervision
Speed change rate, 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 31.33. Otherwise,
maximum allowed deviation from the expected deceleration
rate, which is calculated from parameters
or 23.23 Emergency stop time
deceleration rate (01.29) deviates too much from the
expected rate, the drive trips on
sets bit 8 of 06.17 Drive status word
If 31.32 is set to 0% and 31.33
stop ramp supervision is disabled.
See also parameter 21.04 Emergency stop
Maximum deviation from expected deceleration rate.
and 30.12
by more than the value of this
7310 Overspeed fault.
30.12
Time
30.11
and
delay, together with 01.29
31.32 defines the
23.11...23.19
(Off3). If the actual
73B0 Emergency ramp
2, and coasts to a stop.
is set to 0 s, the emergency
mode.
Parameters 275
Def/FbEq16
500.00 rpm
or the
See par.
46.01
31.33 0%
(Off1)
failed,
1 = 1%