Delta MS300 Series User Manual page 395

Chapter 12 Descriptions of Parameter SettingsMS300
07-12
Speed Tracking during Start-up

Settings
 Speed tracking is suitable for punch, fans and other large inertia loads. For example, a
mechanical punch usually has a large inertia flywheel, and the general stop method is coast to
stop. If it needs to be restarted again, the flywheel may take 2–5 minutes or longer to stop. This
parameter setting allows you to start the flywheel operating again without waiting until the
flywheel stops completely.
07-13
dEb Function Selection

Settings
 dEb (Deceleration Energy Backup) lets the motor decelerate to stop when momentary power
loss occurs. When the power loss is instantaneous, use this function to let the motor decelerate
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.
 Models for frame A, B, C, D = Pr.06-00 + 75 V (575V models) / 60 V (460V models) / 30 V (230V
models)
 Models for frame E and above = Pr.06-00 + 80 V / 40 V (230V models)
 Lv level: Default is 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, MO = 10 (Low voltage warning) still operates.
 The following explains the dEb action:
When the DC bus voltage drops below the dEb setting level, the dEb function starts to work (soft
0: Disable
1: Speed tracking by the maximum output frequency
2: Speed tracking by current frequency command at start
3: Speed tracking by the minimum output frequency
0: Disable
1: dEb with auto-acceleration / auto-deceleration, the drive does not output
the frequency after the power is restored.
2: dEb with auto-acceleration / auto-deceleration, the drive outputs the
frequency after the power is restored.
3: dEb low-voltage control, then the drive's voltage increases to 350 V
700 V and ramps to stop after low frequency
DC
4: dEb high-voltage control of 350 V / 700 V
DC
386
Default: 0
Default: 0
, and the drive ramps to stop
DC
/
DC