Delta CFP2000 Series User Manual page 373

Chapter 12 Description of Parameter SettingsCFP2000
 Lv level: Default = Pr.06-00
 During dEb operation, other protection such as ryF, ov, oc, occ and EF may interrupt it, and
these error codes are recorded.
 The STOP (RESET) command does not work during the dEb auto-deceleration, and the drive
continues decelerating to stop. To make the drive coast to stop immediately, use another
function (EF) instead.
 The B.B. function does not work when executing dEb. The B.B. function is enabled after the dEb
function finishes.
 Even though the Lv warning does not display during dEb operation, if the DC bus voltage is
lower than the Lv level, MOx = 10 (Low voltage warning) still operates.
 The following explains the dEb action:
When the DC voltage drops below the dEb setting level, the dEb function start to work (soft start
relay remains closed) and the drive executes auto-deceleration.
Situation 1: Momentary power-loss, or power current too low and unstable, or power supply

sliding down because of sudden heavy load.
Pr.07-13=1, "dEb active, DC bus voltage returns, output frequency does not return" and
power recovers. When the power recovers and DC bus voltage exceeds the dEb return level,
the drive linearly decelerates to 0 Hz and stops. The keypad displays the "dEb" warning until
you manually reset it, so that you can see the reason for the stop.
Situation 2: Momentary power loss or power current too low and unstable, or power supply

sliding down because of sudden heavy load.
Pr.07-13=2 "dEb active, DC bus voltage returns, output frequency returns" and power
recovers. During the dEb deceleration time (includes 0 Hz run), if the power recovers higher
than dEb return level, the drive maintains the frequency for the set time of Pr.07-14 (default = 3
sec.) and then accelerates again. The dEb warning on the keypad clears automatically.
12.1-07-6