Restart After Momentary Power Stop - Dema Electric D6 Series User Manual

4 Description of function parameters and setting

4.29 Restart after momentary power stop

Correlation function parameters:
12_21
DC link undervoltage action
12_22
DC link undervoltage detection value
12_23
Allowable time for momentary power
failure
12_24
Minimum driving blockade time
12_25
Output voltage recovery time
12_26
Momentary power failure decel time
12_27
Momentary power failure recover accel
time
The detection of momentary power failure is completed by detecting the DC link voltage.
When DC link voltage is less than 12_22,
The motor freely shutdown, and the fault(AE.dcL ) of abnormal alarm is reported;
The motor restarts (if follow-up startup mode is selected, the follow-up startup is made, otherwise, start at the
speed when undervoltage occurs.) if the voltage resumes within the time set within allowable transient outage,
if the time is in exceedance, AE.dcL abnormality is reported.
The motor coasts to a stop, and bus voltage slowly drops. The motor restarts if CPU is still working and
detects that the voltage resumes(if follow-up startup mode is selected, the follow-up startup is made,
otherwise, start at the speed when undervoltage occurs.)
The motor first decelerates at the time of undervoltage, the load kinetic energy is used to maintain bus voltage
during deceleration. Accelerates to the given frequency if the voltage resumes. It can prevent undervoltage
80
Setting range and instruction
0: free shutdown and report the undervoltage fault
(AE.dcL)
1:free shutdown, and restart if the voltage resumes
within the time set by 12_23 or report the
undervoltage fault(AE.dcL) if undervoltage time
exceeds the time set by 12_23.
2:free shutdown, and restart if CPU is still working
and detects that the voltage resumes, without
reporting the undervoltage fault.
3: Decelerate, and accelerate to the reference
frequency if CPU is still working and detects that
the voltage resumes, without reporting the
undervoltage fault.
4: Keep running, without reporting the
undervoltage fault.
200～500 V
0.0～30.0 s
0.1～5.0 s
0.0～5.0 s
The time of the output voltage from 0 to normal
after speed search is completed,
0.0～200.0 s
(if 12_26=0.0, the current decel time is used)
0.0～25.0 s
(if 12_27=0.0, the current accel time is used)
Ex-work
Change Addr
setting
0 × 0C15H
Depends
× 0C16H
on model
0.1 × 0C17H
0.2 × 0C18H
Depends
× 0C 19H
on model
0.0 × 0C1AH
0.0 × 0C1BH