YASKAWA E7LVD002 Technical Manual page 113

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
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
1 Yes - Speed Estimation
2
3 Yes - Current Detection
ON
Deceleration time set in b3-03
*
ON OFF
Output frequency before power loss
*1 Baseblock time may be reduced by the output frequency
*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
Minimum baseblock time
(L2-03)
time exceeds the minimum baseblock time
Automatic Speed Search after
momentary power loss and
No Yes - Speed Estimation
Yes - Speed Estimation
No Yes - Current Detection
Yes - Current Detection
Programming 5 - 21
Set frequency
reference
* Lower limit is set using Speed Search Time (b3-05).
Set frequency
Deceleration
reference
time set in b3-03
b3-02
speed search operating current
immediately before baseblock.
b3-05
Output frequency before power loss
Deceleration speed set in b3-03 Deceleration time set in b3-03
b3-02
Speed search operating time
Speed search wait time (b3-05)
baseblock
Speed search current level
b3-02
Search Delay Time (b3-05).
Set frequency
reference
Speed Search Used for
Run with programmed
multi-function input
Yes - Speed Estimation
Yes - Speed Estimation
Yes - Current Detection
Yes - Current Detection