Omron VARISPEED E7 User Manual page 198

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.
OFF
Run command
Output frequency
Output current
Minimum baseblock time (L2-03) x 0.7*
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.
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)
AC power supply
Output frequency
Output current
Minimum baseblock time (L2-03) x 0.75 *1
Fig 6.33 Speed Search after Baseblock (Calculated Speed: Loss Time Is Set in L2-03)
ON
Deceleration time set in b3-03
Starts using
calculated speed
0.7 to 1.0 s * Lower limit set using Speed Search Wait Time (b3-05)
OFF
ON
Start using
speed detected
*1. After AC power supply recovery, motor waits for
the minimum Speed Search Wait Time (b3-05).
Set frequency ref-
erence
b3-02
10 ms
Automatic Restart
Set frequency
reference
6-41