6-42
Speed Search after Short Baseblock (during Power Loss Recovery, etc.)
• Loss Time shorter than the Minimum Baseblock Time (L2-03)
Fig 6.28 Speed Search after Baseblock (Calculated Speed: Loss Time Is Set in L2-03)
•
Loss Time longer than the Minimum Baseblock Time (L2-03)
Fig 6.29 Speed Search after Baseblock (Calculated Speed: Loss Time > L2-03)
AC power supply
ON
OFF
Output current
Minimum baseblock time (L2-03) x 0.75 *1
10 ms
Start using
speed detected
Set frequency
reference
*1. After AC power supply recovery, motor waits for the
minimum Speed Search Wait Time (b3-05).
Output frequency
Set frequency
reference
Minimum baseblock time
(L2-03)
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.
AC power supply
ON
OFF
Output frequency
Output current
Start using speed detected
10 ms
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