58 Standard programposi features
The best motor control accuracy is achieved by activating a separate motor
identification run (ID run).
See also section Scalar motor control (page 71).
Settings
See parameters
• 99.04 Motor ctrl mode
• 99.13 ID run requested
Reference ramping
Acceleration and deceleration ramping times can be set individually for speed and
frequency 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 46.01 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, the shape of the ramp can be controlled.
Special acceleration/deceleration ramps
The acceleration/deceleration times for the jogging function can be defined
separately; see section Jogging (page 69).
The change rate of the motor potentiometer function (page 78) is adjustable. The
same rate applies in both directions.
A deceleration ramp can be defined for emergency stop (“Off3” mode).
Settings
• Speed reference ramping: Parameters 23.11…23.19 and 46.01
(pages 204 and 280).
• Frequency reference ramping: Parameters 28.71…28.75 and 46.02
(pages 232 and 280).
• Jogging: Parameters 23.20 and 23.21 (page 207).
• Motor potentiometer: Parameter 22.75 (page 202).
• Emergency stop (“Off3” mode): Parameter 23.23 Emergency stop time
(page 207).
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