YASKAWA E7N Technical Manual page 114

OFF
Run command
Maximum output
frequency or
set frequency
Output frequency
Output current
Minimum baseblock time
(L2-03)
Fig 5.10 Speed Search (Current Detection Method) at Startup
AC power supply
ON
Output frequency
Output current
Minimum baseblock time (L2-03)
Fig 5.11 Speed Search (Current Detection Method) after momentary power loss where the power loss
AC power supply
Output frequency
Output current
Fig 5.12 Speed Search (Current Detection Method) after momentary power loss where the power loss
Setting of Automatic Speed Search for
b3-01 all RUN commands
0 No
1 Yes - Speed Estimation
2 No
3 Yes - Current Detection
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ON
Deceleration time set in b3-03
*
* Lower limit is set using Speed Search Time (b3-05).
OFF
Output frequency before power loss
Deceleration
time set in b3-03
*1 Baseblock time may be reduced by the output frequency
immediately before baseblock.
*1 *2 After AC power supply recovery, motor waits for the minimum
Speed Search Wait Time (b2-03).
*2
time is less than the minimum baseblock time
ON OFF Output frequency before power loss
Speed search wait time (b3-05)
Minimum baseblock time
(L2-03)
time exceeds the minimum baseblock time
Automatic Speed Search after
momentary power loss and
baseblock
Yes - Speed Estimation
Yes - Speed Estimation
Yes - Current Detection
Yes - Current Detection
Programming 5 - 21
Set frequency
reference
Speed search current level
b3-02
Search Delay Time (b3-05).
Set frequency
reference
b3-02
speed search operating current
b3-05
Set frequency
Deceleration time set in b3-03
Deceleration speed set in b3-03
reference
b3-02
Speed search operating time
Speed Search Used for
Run with programmed
multi-function input
Yes - Speed Estimation
Yes - Speed Estimation
Yes - Current Detection
Yes - Current Detection