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îš„Speed Search after Short Baseblock (during Power Loss Recovery, etc.) (b3-01=0)
The time chart when the Inverter operation is restarted after power has been restored is shown below.
• Loss Time Shorter Than the Minimum Baseblock Time (L2-03)
Fig 6.44 Speed Search after Baseblock (When Estimated Speed: Loss Time Is Set in L2-03)
•
Loss Time Longer Than the Minimum Baseblock Time (L2-03)
Fig 6.45 Speed Search After Baseblock (Estimated Speed: Loss Time > L2-03)
AC power supply
Output frequency
Output current
OFFON
Start using
speed detected
Set frequency
reference
Minimum baseblock time (L2-03) x 0.75
*1
10 ms
*1 Baseblock time may be reduced by the output frequency
immediately before the baseblock.
*2 After AC power supply recovery, motor waits for the
minimum Speed Search Wait Time (b3-05).
*2
C power supply
Output frequency
Output current
OFF
ON
Start using speed detected
Set frequency
reference
Minimum baseblock time
(L2-03)
10 ms
Speed Search Wait Time
(b3-05)
Note: If the frequency immediately before the baseblock is low or the power supply break time is long,
operation may be the same as the search in case 1.
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