Delta VFD-B Series - Page 145

Chapter 5 Parameters|VFD-B-P Series
5-80 Revision April 2009, SW V1.00
 This parameter sets the DC-bus voltage at which the brake chopper is activated.
 This parameter will be invalid for models above 15kW/20hp for which VFDB brake unit must be
used.
08 - 18 Base Block Speed Search
Factory Setting: 00
Settings 00 Speed search starts with last frequency command
01 Speed search starts with minimum output frequency (Pr.01-05)
 This parameter determines the AC motor drive restart method after External Base Block is
enabled.
B.B.
A
Input B.B. signal
Stop output voltage
Disable B.B. signal
Waiting time 08-06
Speed search
Synchronization speed detection
time
Fig. 1: B.B. speed search with last output frequency downward timing chart
FWD Run
Output current
Output voltage(V)
Output frequency
(H)
08-07
Current limit for
speed search
B.B.
A
Input B.B. signal
Stop output voltage
Disable B.B. signal
Waiting time 08-06
Speed search
Synchronization speed detection
Fig. 2: B.B. speed search with min. output frequency upward timing chart
FWD Run
Output current
Output voltage(V)
Output frequency
(H )
08-07
Current li mit for
spe e d s e ar ch
Time