Parameter Details
11
11.3 b: Application
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 719
If the drive does the number of Speed Search restarts set in this parameter, it will trigger an SEr [Speed Search
Retries Exceeded] error.
■ b3-24: Speed Search Method Selection
No.
(Hex.)
Name Description
Default
(Range)
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.
2
(1, 2)
Set b3-01 = 1 [Speed Search at Start Selection = Enabled] to do Speed Search at start. Set L2-01 = 1 [Power
Loss Ride Through Select = Enabled for L2-02 Time]] to do Speed Search after you restore power after a
momentary power loss.
1 : Speed Estimation
The drive uses the residual voltage from a short baseblock time to estimate the motor speed.
If there is not sufficient residual voltage, then the drive will inject DC current into the motor to estimate the motor
speed.
2 : Current Detection 2
The drive will inject DC current into the motor to estimate motor speed.
■ b3-25: Speed Search Wait Time
No.
(Hex.)
Name Description
Default
(Range)
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)
If the drive detects these faults during speed search, increase the setting value:
• oC [Overcurrent]
• ov [Overvoltage]
• SEr [Speed Search Retries Exceeded]
■ b3-26: Direction Determination Level
No.
(Hex.)
Name Description
Default
(Range)
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)
■ b3-27: Speed Search RUN/BB Priority
No.
(Hex.)
Name Description
Default
(Range)
b3-27
(01C9)
Expert
Speed Search RUN/
BB Priority
Sets the conditions necessary to start Speed Search.
0
(0, 1)
Executes Speed Search from Fmax or Fref [H1-xx = 61/62] for initial speed searches or from the MFDI terminal.
0 : SS Only if RUN Applied Before BB
1 : SS Regardless of RUN/BB Sequence
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