Rush Control; Jogging - ABB ACS280 Firmware Manual



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.
Motor speed
30.12
30.11
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
30.11 Minimum speed
Parameters
31.30 Overspeed trip margin
and
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
20.27
and . 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 (
Overspeed trip level
0
Rush control active
Overspeed trip level
(page
(page
31.30 Overspeed trip margin
Time
31.30 Overspeed trip margin
182 30.12 Maximum speed
),
194
).
21.03 Stop mode
Program features 43
182
(page
20.26
).
)