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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 99).
The change rate of the motor potentiometer function (page 112) 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 451).
• Torque reference ramping: 1.30 Nominal torque scale (page 176), 26.18 Torque
ramp up time (page 340) and 26.19 Torque ramp down time (page 340).
• Frequency reference ramping: 28.71 Freq ramp set selection…28.75 Freq
deceleration time 2 and 46.2 Frequency scaling (page 451).
• Jogging: 23.20 Acc time jogging (page 314) and 23.21 Dec time jogging (page 314).
• Motor potentiometer: 22.75 Motor potentiometer ramp time (page 308).
• Emergency stop (“Off3” mode): 23.23 Emergency stop time (page 314).
84 Program features
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