Delta VFD007EL43W User Manual

Chapter 4 Parameters  VFD-EL-W
4-34
2 Linear acceleration and auto-deceleration.
3 Auto-acceleration and auto-deceleration (set by load)
4 Auto-acceleration and auto-deceleration (set by Acceleration/Deceleration Time
setting)
 With auto-acceleration and auto-deceleration it is possible to reduce vibration and shocks during starting and
stopping the load.
During auto-acceleration, the torque is automatically measured and the drive accelerates to the set frequency
with the shortest acceleration time and the smoothest starting current.
During auto-deceleration, the drive measures the regenerative energy and the motor is stopped smoothly with
the shortest deceleration time.
When this parameter is set to 4, the actual acceleration/deceleration time are equal to or greater than
Pr.01.09–Pr.01.12.
 Auto-acceleration and auto-deceleration makes the complicated processes of tuning unnecessary. It makes
operation efficient and saves energy by acceleration without stalling and deceleration without using the brake
resistor.
 In applications with the brake resistor or brake unit, it is not recommended to use auto-deceleration.
01.17
Acceleration S-Curve Unit: 0.1 / 0.01
01.18
Deceleration S-Curve Unit: 0.1 / 0.01
Default: 0.0 / 0.00
Settings 0.0 S-curve disabled
0.1–10.0/0.01–10.00
S-curve enabled (10.0/10.00 is the smoothest)
 Ensure smooth acceleration and deceleration using an S-curve.
0: Disables the S-curve function.
0.1–10.0/0.01–10.00: Enables the S-curve function.
Setting the parameter to 0.1/0.01 gives the shortest S-curve and setting the parameter to 10.0/10.00 gives the
longest and smoothest S-curve.
 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 actual acceleration and deceleration time depends on the
selected S-curve (0.1 to 10.0). 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 Unit: 0.01
Settings 0.00–400.00Hz Default: 0.0
0
01.21
Simple Positioning Stop Frequency 1 Unit: 0.01
Settings 0.00–400.00Hz Default: 5.00
01.22
Simple Positioning Stop Frequency 2 Unit: 0.01
Settings 0.00–400.00Hz Default: 10.00

Delta VFD007EL43W Specifications

General

Brand	Delta
Model	VFD007EL43W
Category	DC Drives
Language	English