Chapter 5 Parameters_VFD-B Series
Revision 10/2005, BE13, SW V4.08 5-89
Output fre quen cy
(H)
Ou tput v o ltag e
(V )
FWD Run
B.B.
1
5
2
3
4
Fig 2: B.B. Speed Search with Last Output Frequency Downward Timing Chart
0 8-06
Sp eed s earch level
Outp u t curren t
A
Ti me
1
Input B.B. signal
2
Stop output voltage
3
Disable B.B. signal
4
Waiting time
Speed search
6
6
Synchronization speed detection
5
08-07
Current Limit for
Speed Search
Output frequency
(H)
Output voltage
(V)
FWD Run
B.B.
1
5
2
3
4
Fig 3: B.B. Speed Search with Minimum Output Frequency Upward Timing Chart
A
Time
1
2
Stop output voltage
3
Disable B.B. signal
4
Waiting time 08-06
Restart
6
Stall prevention
5
06-01
Over current
stall prevention
during acceleration
6
7
7
Keep accelerating
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