Application Control - ABB ACS580 Firmware Manual

96 Program features

Application control


Reference ramping
Acceleration and deceleration ramping times can be set individually for speed, torque
and frequency reference (Menu - Primary settings - Ramps).
With a speed or frequency reference, the ramps are defined as the time it takes for
the drive to accelerate or decelerate between zero speed or frequency and the value
defined by parameter 46.01 Speed scaling or 46.02 Frequency scaling. The user can
switch between two preset ramp sets using a binary source such as a digital input.
For speed reference, also the shape of the ramp can be controlled.
With a torque reference, the ramps are defined as the time it takes for the reference
to change between zero and nominal motor torque (parameter 01.30 Nominal torque
scale).
Variable slope
Variable slope controls the slope of the speed ramp during a reference change. With
this feature a constantly variable ramp can be used.
Variable slope is only supported in remote control.
Settings
Parameters 23.28 Variable slope (page 215) and 23.29 Variable slope rate (page
215).
Special acceleration/deceleration ramps
The acceleration/deceleration times for the jogging function can be defined
separately; see section Jogging (page 118).
The change rate of the motor potentiometer function (page 121) is adjustable. The
same rate applies in both directions.
A deceleration ramp can be defined for emergency stop ("Off3" mode).