Parameter Details
12
12.2 b: APPLICATION
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual 537
■ b3-32 SpSrch I End Level
No.
(Hex.)
Name Description
Default
(Range)
b3-32
(0BC1)
Expert
SpSrch I End Level
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 [Mot No-Load Current]. Sets a current level given that E2-03 is 30% of the
motor rated current when E2-03 ≤ Motor Rated Current × 0.3.
■ b3-33 SpSrch@Uv Selection
No.
(Hex.)
Name Description
Default
(Range)
b3-33
(0B3F)
Expert
SpSrch@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 parameters as shown to enable b3-33:
• L2-01 = 1 [RideThru@PwrLoss = Enabled]
• L2-50 = 0, 1 [RidThruMode@PwrLoss = Timer Controlled, While CPU Active]
• b3-01 = 1 [SpSrch@Start Selection = Enabled]
• b1-03 = 1 [Stopping Method Selection = Coast->Stop]
0 : Disabled
1 : Enabled
■ b3-35 BckEMF Low Detection Level
No.
(Hex.)
Name Description
Default
(Range)
b3-35
(0BC3)
Expert
BckEMF Low Detection
Level
Sets the level of induced voltage that the drive must detect to start Speed Search.
10%
(5 - 50%)
For example, when the induced voltage at 10% of the setting is a minimum of 20 V for 200 V class drives, the
drive will do restarts.
■ b3-36 HiBackEMF DetLev
No.
(Hex.)
Name Description
Default
(Range)
b3-36
(0BC4)
Expert
HiBackEMF DetLev
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.
97.0%
(50.0% - 100.0%)
For example, if the setting value is 83.0% and the voltage does not decrease to the induced voltage at
approximately 183 V when the power supply voltage is 220 V, the drive will not do restarts.
■ 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.
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