ABB ACS850 series, Firmware Manual

Page: 120 / 260

120 Parameters
19.09 Speed TripMargin Defines, together with 20.01 Maximum speed and 20.02
Minimum speed , the maximum allowed speed of the motor
(overspeed protection). If actual speed ( 01.01 Motor speed
rpm ) exceeds the speed limit defined by parameter 20.01 or
20.02 by more than the value of this parameter, the drive trips
on the OVERSPEED fault.
Example: If the maximum speed is 1420 rpm and speed trip
margin is 300 rpm, the drive trips at 1720 rpm.
0.0 … 10000.0 rpm Overspeed trip margin. 10 = 1 rpm
19.10 Speed window Defines the absolute value for the motor speed window
supervision, i.e. the absolute value for the difference between
the actual speed and the unramped speed reference (
01.01
Motor speed rpm - 03.03 SpeedRef unramp ). When the motor
speed is within the limits defined by this parameter, signal
02.24 FBA main sw bit 8 (AT_SETPOINT) is 1. If the motor
speed is not within the defined limits, bit 8 is 0.
0 … 30000 rpm Absolute value for motor speed window supervision. 1 = 1 rpm
20
20 Limits Drive operation limits. See also section Speed controller
tuning on page 44 .
20.01 Maximum speed Defines the allowed maximum speed.
0 … 30000 rpm Maximum speed. 1 = 1 rpm
20.02 Minimum speed Defines the allowed minimum speed.
-30000 … 0 rpm Minimum speed. 1 = 1 rpm
No. Name/Value Description FbEq
Speed trip margin
Speed trip margin
Speed
Time
20.01
20.02