Parameter Details
12
12.2 b: APPLICATION
SIEPCYEUOQ2V01A Q2V Technical Manual 457
Table 12.10 Speed Search and Related Parameters
Parameter
Speed Estimation Current Detection 2
b3-24 = 1 b3-24 = 2
b3-01 [SpSrch@Start Selection] x x
b3-03 [SpSrch Deceleration Time] - x
b3-05 [SpSrch Delay Time] x x
b3-06 [Speed Curr Lev1 for Estimation] x -
b3-07 [Speed Curr Lev2 for Estimation] x -
b3-08 [Speed ACR PGain for Estimation] x -
b3-09 [Speed ACR ITime for Estimation] x -
b3-10 [Speed Det Gain for Estimation] x -
b3-14 [Speed Bi-Directional Search] x x
b3-17 [Speed Retry Current Level] x x
b3-18 [Speed Retry Delay] x x
b3-19 [Speed Retry Times] x x
b3-24 [SpSrch Method Selection] x (1) x (2)
b3-25 [SpSrch Wait Time] x x
b3-26 [Dir. Determ. Level] x -
b3-29 [SpSrch BackEMF Threshold] - -
b3-31 [SpSrch I Ref Level] - x
b3-32 [SpSrch I End Level] - x
b3-33 [SpSrch@Uv Selection] x x
b3-54 [Search Time] - -
b3-55 [Speed Curr Rise Time] - -
b3-56 [InverseRotationSearch WaitTime] - x
Note:
• To use Speed Estimation Speed Search with V/f Control, do Rotational Auto-Tuning before you set the Speed Search function. If the
wire length between the drive and motor changed since the last time you did Auto-Tuning, do Stationary Auto-Tuning for Line-to-Line
Resistance process again.
• If A1-02 = 5, 6 [PM OLVector, PM AOLVector] and the wiring distance between the motor and drive is long or if the motor is coasting
at more than or equal to 120 Hz, do not use Speed Search to restart the motor. Use Short Circuit Braking.
■ Current Detection 2
Use this Speed Search function with induction motors. Set b3-24 = 2 [SpSrch Method Selection = Current Det2].
Current Detection Speed Search injects current into the motor to detect the speed of an induction motor. Speed
Search increases the output voltage for the time set in L2-04 [Powloss Ramp Time@recovery], starting from the
maximum output frequency or the frequency reference.
Figure 12.22 Current Detection 2 after Momentary Power Loss
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