YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 179

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