Delta VFD-EL-W Series

Chapter 4 Parameters｜VFD-EL-W
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parameter is set to 4, the actual acceleration/deceleration time vary with the setting for Pr.01.09–
Pr.01.12. Therefore, the actual acceleration/ deceleration time are equal to or greater than
Pr.01.09–Pr.01.12.
 Using auto-acceleration and auto-deceleration can avoid complicated adjustment procedures. It
does not stall during acceleration and does not need a brake resistor during deceleration to stop.
It can also improve operation efficiency and save energy.
01.17
S-Curve Acceleration Time Setting
Default: 0.0 / 0.00
Settings
0.0–10.0 sec./ 0.00–10.00 sec.
01.18
S-Curve Deceleration Time Setting
Default: 0.0 / 0.00
Settings
0.0–10.0 sec./ 0.00–10.00 sec.
 Using an S-curve gives the smoothest transition between speed changes. The acceleration and
deceleration curves can be adjusted to different degrees of S-acceleration and S-deceleration
curves by setting Pr.01.17–01.18. When enabled, the drive produces a different acceleration and
deceleration curve according to the acceleration and deceleration time. Set these parameters to
0.0 for linear acceleration/ deceleration.
 The following diagram shows that the original setting of the Acceleration and Deceleration Time
is only for reference when you enable the S-curve. The acceleration/ deceleration time become
longer as the setting value increases. Pr.01.17 must be smaller than Pr.01.09 or Pr.01.11;
Pr.01.18 must be smaller than Pr.01.10 or Pr.01.12. Otherwise, the S-curve is invalid.
The total acceleration time = Pr.01.09 + Pr.01.17 or Pr.01.11 + Pr.01.17
The total deceleration time = Pr.01.10 + Pr.01.18 or Pr.01.12 + Pr.01.18
3
1
2
4
1
3
4
2
1 2
3 4
Disable S curve
Enable S curve
Acceleration/deceleration Characteristics

01.20
Simple Positioning Stop Frequency 0
Default: 0.00
Settings
0.00–400.00 Hz

01.21
Simple Positioning Stop Frequency 1
Default: 5.00
Settings
0.00–400.00 Hz