Automatic Restart
6-41
îš„Examples for Speed Calculation
Search at Startup
The time chart for when speed search at startup and speed search to multi-function input terminals is shown
below.
Fig 6.32 Speed Search at Startup (Calculated Speed)
Speed Search after Short Baseblock (during Power Loss Recovery, etc.)
1. Loss Time shorter than the Minimum Baseblock Time (L2-03)
Fig 6.33 Speed Search after Baseblock (Calculated Speed: Loss Time Is Set in L2-03)
OFF
ON
Run command
Output frequency
Output current
0.7 to 1.0 s
Minimum baseblock time (L2-03) x 0.7*
Deceleration time set in b3-03
b3-02
*
Lower limit set using Speed Search Wait Time (b3-05)
Set frequency ref-
erence
Note: If the stopping method is set to coast to stop, and the run command turns ON in a short
time, the operation may be the same as the search in case 2.
Starts using
calculated speed
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
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