Chapter 12 Description of Parameter SettingsME300
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, MO = 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 starts 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 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 and power recovers.
During the dEb deceleration (includes 0 Hz run), if the power recovers higher than dEb return level,
the drive maintains the frequency for three seconds and then accelerates again. The dEb warning on
the keypad clears automatically.
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