Delta MH300 Series - Page 459

Chapter 12 Description of Parameter Settings
MH300
12.1-07-6

07-12
Speed Tracking during Start-up
Default: 0
Settings 0: Disable
1: Speed tracking by maximum output frequency
2: Speed tracking by motor frequency at start
3: Speed tracking by minimum output frequency
 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.
 In PG control mode, the AC motor drive executes the speed tracking function automatically
according to the PG speed when this setting is NOT set to 0.

07-13
dEb Function Selection
Default: 0
Settings
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
DC
/ 700
V
DC
and ramps to stop after low frequency
4: dEb high-voltage control of 350 V
DC
/ 700 V
DC
, and the drive ramps to stop
 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.
Frame A, B, C, D = Pr.06-00 + 60 V / 30 V (230V models)
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.