Continuing Operation
6-73
îš„Current Detection Speed Search (b3-01=2 or 3)
The time charts for current detection speed search is shown below.
Speed Search at Startup (b3-01=3)
The time chart when speed search at startup or external speed search command of multi-function inputs has
been selected is shown below.
Fig 6.46 Speed Search at Startup (Using Current Detection)
Speed Search after Short Baseblock (during Power Loss Recovery, etc.) (b3-01=2)
The time chart when the Inverter operation is restarted after power has been restored is shown below.
• Loss Time Shorter Than Minimum Baseblock Time
Fig 6.47 Speed Search After Baseblock (Current Detection: Loss Time < L2-03)
•
Loss Time Longer Than Minimum Baseblock Time
Fig 6.48 Speed Search After Baseblock (Current Detection: Loss Time > L2-03)
Run Command
Output frequency
Output current
OFF ON
b3-02
Deceleration time set in b3-03
Set frequency
reference
Minimum baseblock time
(L2-03)
Maximum output
frequency or
set frequency
* Lower limit is set using Speed Search Time (b3-05).
*
C power supply
Output frequency
Output current
OFF
ON
Output frequency before power loss
Set frequency
reference
Minimum baseblock time (L2-03)
*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).
Deceleration
time set in b3-03
b3-02
speed search operating current
*2
*1
C power supply
Output frequency
Output current
OFF
ON
Output frequency before power loss
Set frequency
reference
Minimum baseblock time
(L2-03)
Deceleration speed set in b3-03
b3-02
Speed search operating time
Speed search wait time (b3-05)
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