5.2 b: Application
198 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Parameters
Speed Estimation Current Detection 2
b3-24 = 1 b3-24 = 2
b3-05 [Speed Search Delay Time] x x
b3-06 [Speed Estimation Current Level 1] x -
b3-07 [Speed Estimation Current Level 2] x -
b3-08 [Speed Estimation ACR P Gain] x -
b3-09 [Speed Estimation ACR I Time] x -
b3-10 [Speed Estimation Detection Gain] x -
b3-14 [Bi-directional Speed Search] x x
b3-17 [Speed Est Retry Current Level] x x
b3-18 [Speed Est Retry Detection Time] x x
b3-19 [Speed Search Restart Attempts] x x
b3-24 [Speed Search Method Selection] x (1) x (2)
b3-25 [Speed Search Wait Time] x x
b3-26 [Direction Determination Level] x -
b3-27 [Speed Search RUN/BB Priority] x x
b3-29 [Speed Search Back-EMF Threshold] - -
b3-31 [Spd Search Current Reference Lvl] - x
b3-32 [Spd Search Current Complete Lvl] - x
b3-33 [Speed Search during Uv Selection] x x
b3-54 [Search Time] - -
b3-55 [Current Increment 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.
■ Current Detection 2
Use this Speed Search function with induction motors. Set b3-24 = 2 [Speed Search Method Selection = Current
Detection 2]. 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 [Powerloss V/f Recovery Ramp Time], starting
from the maximum output frequency or the frequency reference.
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