Parameter Details
2
2.3 b: Application
YASKAWA TOEPYAIGA5002A GA500 Programming 179
■ b3-33: Speed Search during Uv Selection
No.
(Hex.)
Name Description
Default
(Range)
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.
1
(0, 1)
Set these three parameters as shown to enable b3-33:
• L2-01 = 1, 2 [Power Loss Ride Through Select = Enabled for L2-02 Time, Enabled while CPU Power Active]
• b3-01 = 1 [Speed Search at Start Selection = Enabled]
• b1-03 = 1 [Stopping Method Selection = Coast to Stop]
0 : Disabled
1 : Enabled
■ b3-54: Search Time
No.
(Hex.)
Name Description
Default
(Range)
b3-54
(3123)
Search Time
Sets the length of time that the drive will run Speed Search.
400 ms
(10 - 2000 ms)
If you set this parameter too low, Speed Search will not operate correctly.
If the drive detects oC [Overcurrent] immediately after Speed Search Starts:
• Increase the value of L2-03 [Minimum Baseblock Time] and decrease the motor speed you use to start Speed
Search.
• Increases the setting value of b3-08 [Speed Estimation ACR P Gain].
• Increase the value of b3-54.
If the drive detects oC or ov [DC Bus Overvoltage] during Speed Search, increase the value of b3-08.
■ b3-55: Current Increment Time
No.
(Hex.)
Name Description
Default
(Range)
b3-55
(3124)
Expert
Current Increment Time
Sets the length of time that the drive will increase the current from zero current to the setting value of
b3-06 [Speed Estimation Current Level 1].
10 ms
(10 - 2000 ms)
Gradually increase the setting value when a large quantity of current flows after speed search starts. If you set this
value too high, speed search will not operate correctly.
■ b3-56: InverseRotationSearch WaitTime
No.
(Hex.)
Name Description
Default
(Range)
b3-56
(3126)
InverseRotationSearch
WaitTime
Sets the wait time until the drive starts inverse rotation search after it completes forward search when
you do inverse rotation search during Current Detection Speed Search.
Determined by o2-04
(0.1 - 5.0 s)
■ b3-61: Initial Pole Detection Gain
No.
(Hex.)
Name Description
Default
(Range)
b3-61
(1B96)
Expert
Initial Pole Detection
Response Gain
Sets the responsiveness for initial motor magnetic pole calculation when A1-02 = 6 [Control Method
Selection = AOLV/PM]. Set b3-61 > 0.0 for an ordinary IPM motor.
5.0
(-20.0 - +20.0)
Used when n8-35 = 1 [Initial Pole Detection Method = High Frequency Injection]. Sets the responsiveness for initial
motor magnetic pole calculation. Set this parameter to a positive value for an ordinary monitor. When you use High
Frequency injection Tuning, it will automatically set this parameter.
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