Parameter List
10
10.5 b: Application
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 505
No.
(Hex.)
Name Description
Default
(Range)
Ref.
b3-14
(019E)
Bi-directional
Speed Search
Sets the direction of Speed Search to the direction of the frequency
reference or in the motor rotation direction as detected by the drive.
0 : Disabled
1 : Enabled
Determined by A1-
02
(0, 1)
718
b3-17
(01F0)
Expert
Speed Est Retry
Current Level
Sets the current level for the search retry function in Speed
Estimation Speed Search as a percentage where drive rated current
is a setting value of 100%.
150%
(0 - 200%)
718
b3-18
(01F1)
Expert
Speed Est Retry
Detection Time
Sets the length of time that the drive will wait to retry Speed
Estimation Speed Search when too much current flow stopped the
Speed Search.
0.10 s
(0.00 - 1.00 s)
718
b3-19
(01F2)
Speed Search
Restart Attempts
Sets the number of times to restart Speed Search if Speed Search
does not complete.
3 times
(0 - 10 times)
718
b3-24
(01C0)
Speed Search
Method Selection
Sets the Speed Search method when starting the motor or when
restoring power after a momentary power loss.
1 : Speed Estimation
2 : Current Detection 2
2
(1, 2)
719
b3-25
(01C8)
Expert
Speed Search Wait
Time
Sets the length of time the drive will wait to start the Speed Search
Retry function.
0.5 s
(0.0 - 30.0 s)
719
b3-26
(01C7)
Expert
Direction
Determination
Level
Sets the level to find the motor rotation direction. Increase the value
if the drive cannot find the direction.
1000
(40 - 60000)
719
b3-27
(01C9)
Expert
Speed Search
RUN/BB Priority
Sets the conditions necessary to start Speed Search.
0 : SS Only if RUN Applied Before BB
1 : SS Regardless of RUN/BB Sequence
0
(0, 1)
719
b3-29
(077C)
Expert
Speed Search
Back-EMF
Threshold
Sets the induced voltage for motors that use Speed Search. The
drive will start Speed Search when the motor induced voltage level
is the same as the setting value. Usually it is not necessary to change
this setting.
10%
(0 - 10%)
720
b3-31
(0BC0)
Expert
Spd Search Current
Reference Lvl
Sets the current level that decreases the output current during
Current Detection Speed Search.
1.50
(1.50 - 3.50)
720
b3-32
(0BC1)
Expert
Spd Search Current
Complete Lvl
Sets the current level that completes Speed Search.
1.20
(0.00 - 1.49)
720
b3-33
(0B3F)
Expert
Speed Search
during Uv
Selection
Sets the function that starts Speed Search at start-up if the drive
detects a Uv [Undervoltage] when it receives a Run command.
0 : Disabled
1 : Enabled
1
(0, 1)
720
b3-35
(0BC3)
Expert
Low Back EMF
Detection Level
Sets the level of induced voltage that the drive must detect to start
Speed Search.
10%
(5 - 50%)
720
b3-36
(0BC4)
Expert
High Back EMF
Detection Level
Sets one of the factors in the formula to prevent drive restarts and
cause the drive to enter standby. The drive will enter standby and
will not restart when the detected induced voltage of the motor ≥
power supply voltage × b3-36. Usually it is not necessary to change
this setting.
0.970
(0.500 - 1.000)
721
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