Speed Search (Current Detection Method) At Startup; Speed Search Settings And Methods - YASKAWA P7 User Manual

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IMPORTANT
If an OC fault occurs when Speed Search is attempted after power loss recovery, increase the setting of L2-03.
Run command
Output frequency
Output current
AC power supply
Output frequency
Output current
Minimum baseblock time (L2-03)
Fig. 13 Speed Search (Current Detection Method) after momentary power loss where the power loss
AC power supply
Output frequency
Output current
Fig. 14 Speed Search (Current Detection Method) after momentary power loss where the power loss
Setting of
Automatic Speed Search
b3-01
for all RUN commands
0
1
Yes - Speed Estimation
2
3
Yes - Current Detection
OFF
ON
Maximum output
frequency or
set frequency
*
Minimum baseblock time
(L2-03)
Fig. 12 Speed Search (Current Detection Method) at Startup
ON
OFF
*1
*2
time is less than the minimum baseblock time
ON
OFF
Minimum baseblock time
(L2-03)
time exceeds the minimum baseblock time

Speed Search Settings and Methods

Automatic Speed Search after
No
No
Programming 5 - 13
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
b3-02
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).
Output frequency before power loss
Deceleration time set in b3-03
Deceleration speed set in b3-03
Speed search operating time
Speed search wait time (b3-05)
momentary power loss and
baseblock
Yes - Speed Estimation
Yes - Speed Estimation
Yes - Current Detection
Yes - Current Detection
Set frequency
reference
Speed search current level
b3-02
Search Delay Time (b3-05).
Set frequency
reference
b3-05
Set frequency
reference
b3-02
Speed Search Used for Run with
programmed multi-function
input
Yes - Speed Estimation
Yes - Speed Estimation
Yes - Current Detection
Yes - Current Detection

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