5 
VFD-B Series 
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED 
5-9
JOG
Decel
Time
Time
Frequency
01-14
JOG
Freq.
JOG
Accel
Time
01-13
01-13
 
01 - 15 
Auto-Acceleration / Deceleration   
a
    Factory Setting: 00
  Settings  00  Linear acceleration / deceleration 
    01  Auto acceleration, linear Deceleration. 
    02  Linear acceleration, auto Deceleration. 
    03  Auto acceleration / deceleration 
    04  Auto acceleration / deceleration (refer to Accel/Decel Time 
setting) 
 
If this parameter is set to 03, the AC drive will accel/decel in the fastest and smoothest 
means possible by automatically adjusting the time of accel/decel. 
 
If this parameter is set to 04, the real accel/decel time will be equal to or more than 
parameter Pr.01-09 ~Pr.01-12 and Pr.01-18 to Pr.01-21. 
01 - 16 
Acceleration S-Curve         Factory Setting: 00
01 - 17 
Deceleration S-Curve         Factory Setting: 00
  Settings  00 to 07 
 
This parameter is used to ensure a smooth acceleration and deceleration. The S-curve 
is enabled when sets at 01-07. Setting 1 offers the quickest S-curve and 07 offers the 
longest and smoothest S-curve. The AC drive will not follow Accel/Decel Time in 
Pr.01-09 to Pr.01-12. To Disable the S-curve, set Pr.01-16 and Pr.01-17 to 00. 
NOTE: From the diagram shown below, the original setting Accel/Decel Time will be for 
reference when the function of the S-curve is enabled. The actual Accel/Decel Time will be 
determined based on the S-curve selected (01 to 07).