Delta CP2000 Series User Manual page 443

Chapter 12 Description of Parameter SettingsCP2000
 Even the Lv warning does not appear during dEb time, but the MO=10 "Low voltage warning"
will be activated if the DCBUS voltage is lower than the Lv level.
 dEb actions are illustrated as below
When the DCBUS voltage drops to a level, which is smaller than the dEb activation level, the
dEb function will be activated (the soft start relay is closed) and the motor drive will begin the
auto-deceleration.
 Situation 1: Insufficient power supply due to momentary power-loss/unstable power (due to low
voltage)/sudden heavy-load
1. Pr07-13=1 "dEb with auto accel./decel., the output frequency will not return after power
reply" and power restore.
2. When the power restores and DCBUS voltage is higher than the "dEb return level", the
drive will automatically switch from coast stop to ramp stop until 0Hz and stop. The keypad
will display "dEb" warning until manually reset and this can avoid that users do not know
the reason for stopping.
Ou tput f requen cy
 Situation 2: Insufficient power supply due to momentary power-loss/unstable power (due to low
voltage)/sudden heavy-load
1. Pr07-13=2 "dEb with auto accel./decel., the output frequency will return after power reply"
and power restore
2. During the dEb deceleration time (include 0hz run), if the power restore and DCBUS
voltage is higher than "dEb return level", the drive will maintain the current frequency for 3
seconds and restart to accelerated, the dEb warning show on the keypad will then cleared
automatically.
DC BU S volta ge
d Eb re turn le ve l
dEb activa ted le ve l
Lv l eve l
So ft sta rt r el ay at
pow er si de
dEb activa ted
0H z
Au to dece lerati on
12.1-07-6
L ine ar d ecel eratio n