Delta Electronics VFD-E manual 08.25, Status 2 unexpected power off, such as momentary power loss

Chapter 4 Parameters

to lower the freqeuency command by PLC or the host controller. On the other hand, it can be high-speed operation.

08.24DEB Function

				Factory Setting: 0
	Settings	0	Disable
		1	Enable
08.25	DEB Return Time			Unit: 1
	Settings	0~250 sec		Factory Setting: 0

The DEB (Deceleration Energy Backup) function is the AC motor drive decelerates to stop after momentary power loss. When the momentary power loss occurs, this function can be used for the motor to decelerate to 0 speed with deceleration stop method. When the power is on again, motor will run again after DEB return time. (for high-speed axis application)

Status 1: Insufficient power supply due to momentary power-loss/unstable power (due to low voltage)/sudden heavy-load

	DC BUS voltage
	The level for DEB return time	it doesn't need
	(Lv=+30V+58V)	multi-function terminals
The level for soft start relay to be ON
(Lv+30)	Lv level
	Soft start relay at
	power side

DEB function is activated

Output frequency

Pr.07-13 Decel. time selection for momentary power loss

DEB return time

NOTE

07-14

When Pr.07-14 is set to 0, the AC motor drive will be stopped and won't re-start at the power-on again.

Status 2: unexpected power off, such as momentary power loss

4-110 Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11