Operating Instructions

Descriptions of Parameter Settings
Descriptions of Parameter Settings
188 | 443
Pr.
Explanation
Settings
Default
07-12
Speed tracking during start-up
0: Disable
1: Speed tracking by the maximum output frequency
2: Speed tracking by the motor frequency at start-up
3: Speed tracking by the minimum output frequency
0
● 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 to 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.
Pr.
Explanation
Settings
Default
07-13
dEb function selection
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
Vdc/700 Vdc and ramps to stop after low frequency
4: dEb high-voltage control of 350 Vdc / 700 Vdc, and the drive ramps to
stop
0
● 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 series) / 60 V (460V series) / 30 V (230V series)
● Models for frame E and above = Pr.06-00 + 80 V / 40 V (230V series)
● 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 start relay
remains closed), and the drive executes auto-deceleration.
Situation 1: Momentary power loss, or too low and unstable power voltage, 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 you can see the reason for the
stop.