12.3 b: Application
740 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
■ 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 to 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
■ b3-29: Speed Search Back-EMF Threshold
No.
(Hex.)
Name Description
Default
(Range)
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%)
To make adjustments, gradually decrease the setting value. If you decrease the setting value too much, speed search
will not operate correctly.
■ b3-31: Spd Search Current Reference Lvl
No.
(Hex.)
Name Description
Default
(Range)
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)
Set this parameter as a ratio of E2-03 [Motor No-Load Current]. The setting is a ratio with respect to 30% of the
motor rated current when E2-03 ≤ E2-01 [Motor Rated Current (FLA)] × 0.3.
Note:
When A1-02 = 8 [Control Method Selection = EZOLV], the setting is a ratio with respect to E9-06 [Motor Rated Current (FLA)] × 0.5.
■ b3-32: Spd Search Current Complete Lvl
No.
(Hex.)
Name Description
Default
(Range)
b3-32
(0BC1)
Expert
Spd Search Current
Complete Lvl
Sets the current level that completes Speed Search.
1.20
(0.00 - 1.49)
The Current Detection Speed Search gradually decreases the output frequency to search for the motor speed when the
output current is equal to or less than Speed Search Current Complete Level.
Set this parameter as a ratio of E2-03 [Motor No-Load Current]. The setting is a ratio with respect to 30% of the
motor rated current when E2-03 ≤ E2-01 [Motor Rated Current (FLA)] × 0.3.
Note:
When A1-02 = 8 [Control Method Selection = EZOLV], the setting is a ratio with respect to E9-06 [Motor Rated Current (FLA)] × 0.5.
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