The acceleration time determines the time required for the AC motor drive to ramp from 0.00 Hz
to the maximum operation frequency (Pr.01-00). The deceleration time determines the time
required for the AC motor drive to decelerate from the maximum operation frequency (Pr.01-00)
down to 0.00 Hz.
The acceleration and deceleration time are invalid when using Pr.01-44 Auto-acceleration and
Auto-deceleration Setting.
Select the Acceleration/Deceleration Time 1, 2, 3, 4 with the multi-function input terminal
settings. The defaults are Acceleration Time 1 and Deceleration Time 1.
With the enabled torque limits and stall prevention functions, the actual acceleration and
deceleration time are longer than the above action time.
Note that setting the acceleration and deceleration time too short may trigger the drive’s
protection function (Pr.06-03 Over-current Stall Prevention during Acceleration or Pr.06-01 Over-
voltage Stall Prevention), and the actual acceleration and deceleration time are longer than this
setting.
Note that setting the acceleration time too short may cause motor damage or trigger drive
protection due to over-current during the drive’s acceleration.
Note that setting the deceleration time too short may cause motor damage or trigger drive
protection due to over-current during the drive’s deceleration or over-voltage.
Use suitable brake resistors (refer to Chapter 07 Optional Accessories) to decelerate in a short
time and prevent over-voltage.
When you enable Pr.01-24–Pr.01-27 (S-curve acceleration and deceleration begin and arrival
time), the actual acceleration and deceleration time are longer than the setting.
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