Delta VFD015EL43W-1 - Base Block Speed Search; Base Block Time for Speed Search (B.B.)

Chapter 4 Parameters  VFD-EL-W
4-70
 The selected operation after power loss in Pr.08.04 is only executed when the maximum allowable power loss
time is  5 seconds and the AC motor drive keypad displays “Lu”.
If the AC motor drive is powered off due to overload, even if the maximum allowable power loss time is  5
seconds, the drive does not execute the operation mode you set for Pr.08.04. In that case it starts up
normally.
08.06
Base Block Speed Search
Default: 1
Settings 0 Disable
1 Speed search starts with the last frequency command
2 Speed search starts with the minimum output frequency (Pr.01.05)
 Determines the AC motor drive restart method after an External Base Block is enabled.
Output frequency
(H)
Output voltage(V)
08.08 Current Limit
for Speed SearchSpeed
FWD Run
Time
B.B.
Fig 1:B.B. Speed Search with Last Output Frequency Downward Timing Chart
(Speed Search Current Attains Speed Search Level)
A
Input B.B. signal
Stop output voltage
Disable B.B. signal
Waiting time 08.07
Speed Search
Synchronization speed detection
Time
B.B.
Fi g 2: B.B. Speed Search wi th Last Output Frequency Downward Timing Chart
(Speed Search Current doesn't Attain Speed Search Level)
A
Input B.B. signal
Stop output voltage
Disable B.B. signal
Waiting time 08.07
Speed Search
Synchronization speed detection
Output frequency
(H)
08.08 Current Limit
for Speed SearchSpeed
FWD Run
Time
B.B.
Fig3: B.B. Speed Search with Minimum Output Frequency Upward Timing Chart
A
Input B.B. signal
Stop output voltage
Disable B.B. signal
Waiting time 08.07
Restart
Synchronization speed detection
Keep accelerating
A
Output frequency
(H)
06.01
Over current
stall prevention
during acceleration
FWD Run
08.07
Base Block Time for Speed Search (B.B.) Unit: 0.1