Delta Electronics VFD-VE Series manual Status 2 unexpected power off, such as momentary power loss

Lv level

	DC BUS voltage	Chapter 4 Parameters
	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

07-14

NOTE

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

DC BUS voltage

The level for DEB return time (Lv=+30V+58V)

The level for soft start relay to be ON (Lv+30)

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

07-14

NOTE

For example, in textile machinery, you will hope that all the machines can be decelerated to stop to prevent broken stitching when power loss. In this case, the host controller will send a message to the AC motor drive to use DEB function with deceleration time via EF.

Revision August 2008, 03VE, SW V2.04 4-113