5.2 Motor Performance Fine TuningYASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07) 189Troubleshooting5◆ Open Loop Vector (OLV) Motor Control Method TuningTable 5.2 Parameters for Tuning the Drive in OLV Motor Control MethodProblem Parameter No. Countermeasure DefaultValueSuggestedSetting• Poor motor torque and speedresponse• Control motor hunting andoscillation at speeds between10 and 40 Hz.AFR Gain(n2-01)• If motor torque and speed response are tooslow, gradually decrease the setting by0.05.• If motor hunting and oscillation occur,gradually increase the setting by 0.05.1.00 0.50 to 2.00• Poor motor torque and speedresponse• Control motor hunting andoscillation at speeds between10 and 40 Hz.AFR TimeConstant 1(n2-02)• To improve motor torque speed response,gradually reduce this setting by10 ms and check the performance.• If motor hunting and oscillation occur as aresult of load inertia, gradually increasethe setting by 50 ms and check theperformance. Note: Ensure that n2-02 ≤n2-03. When making adjustments to n2-02, set C4-02 (Torque CompensationPrimary Delay Time Constant 1)accordingly.50 ms 50 to 2000ms• Overvoltage trips whenaccelerating, decelerating, orduring sudden speed or loadchanges.AFR TimeConstant 2(n2-03)• If overvoltage trips occur, graduallyincrease this setting by 50 ms.• If response is slow, gradually reduce thissetting by 10 ms. Note: Ensure that n2-02≤ n2-03. When making adjustments to n2-03, increase the value ofC4-06 (Torque Compensation PrimaryDelay Time 2) proportionally.750 ms 750 to 2000ms• Poor motor torque and speedresponse• Motor hunting andoscillation.TorqueCompensationPrimary DelayTime Constant 1(C4-02)• To improve motor torque speed response,gradually reduce this setting by 2 ms andcheck the performance.• If motor hunting and oscillation occur,gradually increase this setting by 10 ms.Note: Ensure that C4-02 ≤ C4-06. Whenmaking adjustments to C4-02, increase n2-02 (AFR Time Constant) proportionally.20 ms<1> 20 to 100 ms• Overvoltage trips whenaccelerating, decelerating, orduring sudden speed or loadchangesTorqueCompensationPrimary DelayTime Constant 2(C4-06)• If overvoltage trips occur, graduallyincrease this setting by 10 ms and checkthe performance.• If response is slow, gradually reduce thissetting by 2 ms and check theperformance. Note: Ensure that C4-02 ≤C4-06. When changing C4-06 (TorqueCompensation Primary Delay Timeconstant 2), increase the value of n2-03proportionally.150 ms 150 to 750ms
