11.2 A: Initialization Parameters588 YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical ManualAdjustment parameter Nameb2-01 DC Injection/Zero SpeedThresholdb2-02 DC Injection Braking Currentb2-04 DC Inject Braking Time at StopH2-xx = 5 Frequency Detection 2Figure 11.7 DC Injection Braking at Stop, Zero Speed Control FunctionNote:• When the mechanical operation of the holding brake is slow, to prevent rollback while the motor is stopped, DC Injection Braking(zero speed control when set to closed loop vector) should be performed until the brake is fully closed.• While in V/f Control and Open Loop Vector Control modes, when the load cannot be held via DC Injection Braking while stopped, useDwell Function at Stop.–b6-03 [Dwell Reference at Stop]: Minimum output frequency to 3.0 HzHowever, for conditions under which Frequency Detection 2 is OFF, it is less than L4-01 - L4-02 [Speed Agree Detection Level -Speed Agree Detection Width].–b6-04 [Dwell Time at Stop] suggested setting: 0.3 to 0.5 s–b2-04 [DC Inject Braking Time at Stop] suggested setting: 0.0 sTorque Compensation (Torque Bias)This function allows the shock from opening and closing the holding brake to be reduced by entering the torquecompensation (torque bias) signal that matches a predefined load from the MFAI terminal while in Closed LoopVector Control. Detection of the load and motoring/regeneration on the machine side must be done beforehand. Ifthere is a polarity error, shock may increase in some circumstances.
