12.2 b: APPLICATION
558 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual
■ b3-39 Regen Jdmt Lv of SpSrch
No.
(Hex.)
Name Description
Default
(Range)
b3-39
(1B8F)
Expert
Regen Jdmt Lv of SpSrch
Sets the level to determine the regenerative state during speed search. Usually it is not necessary
to change this setting.
15%
(0 - 50%)
If the speed search is not completed after starting the speed search, increase the setting value in 5% increments
after the drive stops.
If the drive detects ov [Overvoltage] during speed search, decrease the setting value in 5% increments after the
drive stops.
■ 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 [Min Baseblck Time] and decrease the motor speed you use to start Speed Search.
• Increases the setting value of b3-08 [Speed ACR PGain for Estimation].
• 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 Speed Curr Rise Time
No.
(Hex.)
Name Description
Default
(Range)
b3-55
(3124)
Expert
Speed Curr Rise Time
Sets the length of time that the drive will increase the current from zero current to the setting
value of b3-06 [Speed Curr Lev1 for Estimation].
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 Inv Rot Srch Time
No.
(Hex.)
Name Description
Default
(Range)
b3-56
(3126)
Inv Rot Srch Time
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 Magn Pole Find Gain
No.
(Hex.)
Name Description
Default
(Range)
b3-61
(1B96)
Expert
Magn Pole Find Gain
Sets the responsiveness for initial motor magnetic pole calculation when A1-02 = 6 [Control
Method = PM AOLVector]. Set b3-61 > 0.0 for an ordinary IPM motor.
5.0
(-20.0 - +20.0)
Note:
• Set n8-35 = 1 [InitRotorPos Selection = Pull-In] to enable this parameter.
• The drive automatically calculates this value when High Frequency Injection Auto-Tuning completes successfully.
Used when n8-35 = 1 [InitRotorPos Selection = Pull-In]. 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.
◆ b4: TIMER
The drive uses timers to delay activating and deactivating MFDO terminals.
Timers prevent sensors and switches from making chattering noise.
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