Delta VFD1600C43A-21 - Page 628

Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-07-9
 Situation 4:
Pr.07-13=2 “dEb active, DC bus voltage returns, the output frequency returns” and power does
not recover.
The drive decelerates to 0 Hz. The DC bus voltage continues to decrease until the voltage is
lower than the Lv level, and then the drive disconnects the soft start relay. The keypad displays
“dEb” warning until the drive completely runs out of power.
 Situation 5:
Pr.07-13=2 “dEb low voltage control, when the speed is lower than 1/4 rated motor speed, DC
bus voltage rises to 350V
DC
/ 700V
DC
, the drive ramps to stop.
The drive decelerates to 0 Hz. The DC bus voltage continues to decrease until the voltage is
lower than the Lv level, and then the drive disconnects the soft start relay. The soft start relay
closes again after the power recovers and the DC bus voltage is higher than the Lv return level.
When the DC bus voltage is higher than the dEb return level, the drive maintains the frequency
for the set time of Pr.07-14 (default = 3 sec.) and starts to accelerate linearly, and the dEb
warning on the keypad is automatically cleared.
 Situation 6:
Pr.07-13=4, dEb high-voltage control
When dEb occurs, the DC bus voltage control level rises to 350V
DC
/ 700V
DC
to ramp to stop.
Even though the power recovers and the frequency does not return, dEb activates until the
motor decelerates to 0Hz.
(1) When dEb activates, it sends dEb warning. When the output frequency reaches 0Hz, the
operation status is STOP and disables the dEb function, the dEb warning continues.
(2) If power does not recover, the DC bus voltage drops until reaches the Lv level, the drive
LvS error occurs (keypad displays LvS error that covers the dEb display), the Soft Start
Relay will be OFF.

07-14
dEb Function Reset Time
Default: 3.0
Settings 0.0–25.0 sec.
 dEb (Deceleration Energy Backup) lets the motor decelerate to stop when momentary power loss
occurs. When the power loss is instantaneous, use this function to let the motor decelerate to zero
speed.

07-15
Dwell Time at Acceleration
Default: 0.00
Settings 0.00–600.00 sec.

07-16
Dwell Frequency at Acceleration
Default: 0.00
Settings 0.00–599.00 Hz

07-17
Dwell Time at Deceleration
Default: 0.00
Settings 0.00–600.00 sec.