ABB ACS280, Firmware Manual, Page: 43 / 430

Program features 43

Rush control
Rush control is automatically on when the operation mode is torque. In torque
control, the motor could potentially rush if the load were suddenly lost. The
control program has a rush control function that decreases the torque
reference whenever the motor speed exceeds the set minimum speed or
maximum speed.
The function is based on a PI controller. The program sets the proportional gain
to 5.0 and integration time to 2.5 s.
Settings and diagnostics
Parameters 30.11 Minimum speed (page 182 ), 30.12 Maximum speed (page 182 )
and
31.30 Overspeed trip margin
(page
194
).
Events: -

Jogging
The jogging function enables the use of a momentary switch to briefly rotate
the motor. The jogging function is typically used during servicing or
commissioning to control the machinery locally.
Two jogging functions (1 and 2) are available, each with their own activation
sources and references. The signal sources are selected by parameters
20.26
and 20.27 . When jogging is activated, the drive starts and accelerates to the
defined jogging speed along the defined jogging acceleration ramp. After the
activation signal switches off, the drive decelerates to a stop along the defined
jogging deceleration ramp.
The figure and table below provide an example of how the drive operates during
jogging. In the example, the ramp stop mode is used (
21.03 Stop mode
).
Motor speed
Time
Overspeed trip level
Overspeed trip level
31.30 Overspeed trip margin
0
31.30 Overspeed trip margin
30.12
30.11
Rush control active