Parameters 205
31.28 Stall time Stall time. See parameter 31.24 Stall function.20 s
0…3600 s Stall time. -
31.30 Overspeed trip margin Defines, together with 30.11 Minimum speed and 30.12
Maximum speed, the maximum allowed speed of the
motor (overspeed protection). If the speed (24.02 Used
speed feedback) exceeds the speed limit defined by
parameter 30.11 or 30.12 by more than the value of this
parameter, the drive trips on the 7310 Overspeed fault.
WARNING! This function only supervises the
speed in vector motor control mode. The function
is not effective in scalar motor control mode.
Example: If the maximum speed is 1420 rpm and speed
trip margin is 300 rpm, the drive trips at 1720 rpm.
500.00 rpm
0.00…10000.00 rpm Overspeed trip margin. See par.
46.01
31.32 Emergency ramp
supervision
Parameters 31.32 Emergency ramp supervision and
31.33 Emergency ramp supervision delay, together with
the derivative of 24.02 Used speed feedback, 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, 31.32 defines
the maximum allowed deviation from the expected
deceleration rate, which is calculated from parameters
23.11… 23.15 (Off1) or 23.23 Emergency stop time (Off3).
If the actual deceleration rate (24.02) deviates too much
from the expected rate, the drive trips on 73B0
Emergency ramp failed, sets bit 8 of 06.17 Drive status
word 2, and coasts to a stop.
If 31.32 is set to 0% and 31.33 is set to 0 s, the
emergency stop ramp supervision is disabled.
See also parameter 21.04 Emergency stop mode.
0%
0…300% Maximum deviation from expected deceleration rate. 1 = 1%
No. Name/Value Description Default
FbEq 16
Speed (24.02)
Time
30.12
30.11
31.30
Overspeed trip level
Overspeed trip level
31.30
0
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