Delta Electronics VFD-EL manual 08.07

Output frequency

(H)
Output voltage(V)
08.08 Current Limit	A
for Speed SearchSpeed

FWD Run

B.B.

Chapter 4 Parameters

Input B.B. signal

Stop output voltage

Disable B.B. signal

Waiting time 08.07

Speed Search Synchronization speed detection

Time

Fig 1:B.B. Speed Search with Last Output Frequency Downward Timing Chart (Speed Search Current Attains Speed Search Level)

Output frequency		Input B.B. signal
(H)
		Stop output voltage
		Disable B.B. signal
08.08 Current Limit		Waiting time 08.07
	A	Speed Search
for Speed SearchSpeed		Synchronization speed detection
		Time
FWD Run
B.B.
	Fig 2: B.B. Speed Search with Last Output Frequency Downward Timing Chart
	(Speed Search Current doesn't Attain Speed Search Level)

Output frequency

(H)

06.01

Over current

stall prevention A A during acceleration

FWD Run

Input B.B. signal Stop output voltage Disable B.B. signal Waiting time 08.07 Restart

Synchronization speed detection

Keep accelerating Time

		B.B.
		Fig3: B.B. Speed Search with Minimum Output Frequency Upward Timing Chart
08.07	Baseblock Time for Speed Search (BB)		Unit: 0.1
	Settings	0.1 to 5.0 sec	Factory Setting: 0.5

Revision August 2008, 2ELE, V1.02 4-79