Delta VFD-VE - Maximum Allowable Power Loss Time; Baseblock Time for Speed Search (BB)

Chapter 4 Parameters
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07-07 Maximum Allowable Power Loss Time Unit: 0.1
Control
mode
VF VFPG SVC FOCPG TQCPG
Factory Setting: 2.0
Settings 0.1 to 5.0 sec
 If the duration of a power loss is less than this parameter setting, the AC motor drive
will resume operation. If it exceeds the Maximum Allowable Power Loss Time, the AC
motor drive output is then turned off (coast stop).
 The selected operation after power loss in Pr.07-06 is only executed when the maximum
allowable power loss time is 5 seconds and the AC motor drive displays “Lu”.
But if the AC motor drive is powered off due to overload, even if the maximum allowable
power loss time is 5 seconds, the operation mode as set in Pr.07-06 is not executed. In
that case it starts up normally.
07-08 Baseblock Time for Speed Search (BB) Unit: 0.1
Control
mode
VF VFPG SVC FOCPG TQCPG
Factory Setting: 0.5
Settings 0.1 to 5.0 sec
 When momentary power loss is detected, the AC drive will block its output and then
wait for a specified period of time (determined by Pr.07-08, called Base-Block Time)
before resuming operation. This parameter should be set at a value to ensure that any
residual regeneration voltage from the motor on the output has disappeared before the
drive is activated again.
B.B.
A
Output frequency(H)
Output voltage(V)
Output current
07-09
Current Limit for
Speed Search
FWD Run
Time
B.B. Search with last output frequency downward timing chart
Input B.B. signal
Stop output voltage
Disable B.B. signal
Waiting time Pr.07-08
Speed search
Synchronization speed detection
7
7
Frequency command before B.B.