Chapter 12 Description of Parameter SettingsCP2000
12.1-07-6
to zero speed. If the power recovers at this time, the drive restarts the motor after the dEb return
time.
Lv return level: Default value depends on the drive power model
Frame A, B, C, D = Pr.06-00 + 60V/30V (230V models)
Frame E and above = Pr.06-00 + 80V/40V (230V models)
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.
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