Inovance MD380 Series - Page 207

MD380 User Manual Desc
ription of Function Codes
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8SRQLQVWDQWDQHRXVSRZHUIDLOXUHRUVXGGHQYROWDJHGLSWKH'&EXVYROWDJHRIWKH$&GULYH
reduces. This function enables the AC drive to compensate the DC bus voltage reduction
with the load feedback energy by reducing the output frequency so as to keep the AC drive
running continuously.
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GHFHOHUDWHV2QFHWKHEXVYROWDJHUHVXPHVWRQRUPDOWKH$&GULYHDFFHOHUDWHVWRWKH
set frequency. If the bus voltage remains normal for the time exceeding the value set in
F9-61, it is considered that the bus voltage resumes to normal.
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decelerates to stop.
Figure 6-27 AC drive action diagram upon instantaneous power failure
Running
frequency
Running
frequency
F9-60 (
Judging voltage of
action disabled at
instantaneous power failure)
Stop
acceleration/
deceleration
F9-59 1: Decelerate
F9-59 2: Decelerate
to stop
F9-62 ( Judging voltage of
action at instantaneous
power failure)
Bus voltage
F9-61 ( Voltage recovery
judging time at
instantaneous power failure)
Acceleration
/deceleration
time 4
Acceleration/
deceleration
time 4
Normal
running
Normal
running
Stop
acceleration/
deceleration
Stop
acceleration/
deceleration
Normal
running
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