Omron VARISPEED E7 User Manual page 199

2. Loss Time longer than the Minimum Baseblock Time (L2-03)
AC power supply
Output frequency
Output current
Examples for Current Detection
Speed Search at Startup
The time chart when speed search at startup or external speed search command is selected is shown below.
Run command
Output frequency
Output current
Speed Search after Short Baseblock (during Power Loss Recovery, etc.)
1. Loss time shorter than minimum baseblock time
AC power supply
Output frequency
Output current
6-42
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 6.34 Speed Search after Baseblock (Calculated Speed: Loss Time > L2-03)
OFF
ON
Maximum output
frequency or
set frequency
Minimum baseblock time*
(L2-03)
Fig 6.35 Speed Search at Startup (Current Detection)
OFF
ON
Minimum baseblock time (L2-03)*1
Fig 6.36 Speed Search After Baseblock (Current Detection: Loss Time < L2-03)
OFF Start using speed detected
10 ms
Speed Search Wait Time
(b3-05)
Deceleration time set in b3-03
* Lower limit is set using Speed Search Time (b3-05).
Output frequency before power loss
Deceleration time
set in b3-03
speed search operating current
*1 Baseblock time may be reduced by the output
frequency immediately before baseblock.
*2 After AC power supply recovery, motor waits for
the minimum Speed Search Wait Time (b2-03).
*2
Set frequency
reference
Set frequency
reference
b3-02
Set frequency
reference
b3-02