Delta C2000 series User Manual page 343

Chapter 12 Description of Parameter SettingsC2000 Series
 function is the AC motor drive decelerates to stop after momentary power loss. When the
momentary power loss occurs, this function can be used for the motor to decelerate to 0 speed with
deceleration stop method. When the power is on again, motor will run again after DEB return time.
(has applied on high-speed spindle)
Status 1: Insufficient power supply due to momentary power-loss/unstable power (due to low
voltage)/sudden heavy-load
Level for soft start relay to be ON
Output frequency
Pr07-13 Decel. time at momentary
power loss (dEb function)
dEb return time
Note (1)When Pr07-14 is set to 0, the motor drive will stop and will not accelerate to the frequency before dEb even
the power is on again. But when Pr07-14 is NOT set to 0, then a commad of zero speed will be sent to wait for power
on.
Note (2) dEb activation level is when DCBUS voltage level is lower than (230V series : Lv level +20Vdc)
Status 2: unexpected power off, such as momentary power loss
Level for soft start relay to be ON
dEb function activated
NOTE
For example, in textile machinery, you will hope that all the machines can be decelerated to stop to prevent broken stitching
when power loss. In this case, the host controller will send a message to the AC motor drive to use dEb function with
deceleration time via EF.
DCBUS voltage
dEb activation level
Soft start relay
at power side
dEb function
activated
0Hz
NO
DCBUS voltage
Lv level
Soft start relay
at power side
Output frequency
Pr.07-13 Decel. time selection at
momentary power loss
dEb return time
07-14
(460V series: Lv level +40Vdc)
07-14
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