4-132
(b) Speed search in recovery period of momentary power failure
Run command
Search command
Output frequency
Output voltage
Speed search
operation
Output current
Speed search decel time (07-21)
Return to the voltage at normal
running
Voltage recovery time (07-23)
(07-20)
t
t
t
t
t
V/f during speed search
(07-18)
Momentary power loss
Minimum b.b. time (07-18) t
t
Figure 4.3.66 Speed search in recovery period of momentary power failure
‧ If the minimum base block time (07-18) is longer than the momentary power failure
time, the speed search begins operation after the minimum base block time
(07-18).
‧ If the minimum base block time (07-18) is short, the speed search operation
begins immediately after the power is restored.
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