ABB ACS880 - Reference Ramping; Special Acceleration;Deceleration Ramps; Settings and Diagnostics

￭ Reference ramping
Acceleration and deceleration ramping times can be set individually for speed, frequency
and torque reference.
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 46.1 or 46.2. 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 1.30).
Special acceleration/deceleration ramps
The acceleration/deceleration times for the jogging function can be defined separately;
see section Jogging (page 61).
The change rate of the motor potentiometer function (page 75) is adjustable. The same
rate applies in both directions.
A deceleration ramp can be defined for emergency stop (“Off3” mode).
Settings and diagnostics
Parameters:
•
Speed reference ramping: 23.11 Ramp set selection…23.19 Shape time dec 2 and
46.1 Speed scaling (page 403).
•
Torque reference ramping: 1.30 Nominal torque scale (page 138), 26.18 Torque
ramp up time (page 298) and 26.19 Torque ramp down time (page 298).
•
Frequency reference ramping: 28.71 Freq ramp set selection…28.75 Freq
deceleration time 2 and 46.2 Frequency scaling (page 403).
•
Jogging: 23.20 Acc time jogging (page 274) and 23.21 Dec time jogging (page 274).
•
Motor potentiometer: 22.75 Motor potentiometer ramp time (page 269).
•
Emergency stop (“Off3” mode): 23.23 Emergency stop time (page 274).
Program features 47