Chapter 12 Description of Parameter Settings
MH300
Default: 10.00
Settings Pr.01-45 = 0: 0.00–600.00 sec.
Pr.01-45 = 1: 0.0–6000.0 sec.
Use the acceleration time to determine the time required for the AC motor drive to accelerate from
0 Hz to maximum output frequency (Pr.01-00).
The acceleration and deceleration time are invalid when using Pr.01-44 Auto-acceleration and
Auto-deceleration Setting.
Select the acceleration and deceleration time 1, 2, 3, and 4 with the multi-function input terminals
settings. The defaults are acceleration 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 protection
function (Pr.06-03 Over-current Stall Prevention during Acceleration or Pr.06-01 Over-voltage
Stall Prevention).
Note that setting the acceleration time too short may cause motor damage or trigger drive
protection due to over-current during acceleration.
Note that setting the deceleration time too short may cause motor damage or trigger drive
protection due to over-current during 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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