12.10 n: Special Adjustment710 YASKAWA SIEPC71061753A GA500 Technical Manual12.10 n: Special Adjustmentn parameters set these functions:• Function to prevent hunting• High-slip braking• Motor line-to-line resistance online tuning• Fine-tune the parameters that adjust motor control◆ n1: Hunting PreventionThe Hunting Prevention function will not let low inertia or operation with a light load cause hunting. Huntingfrequently occurs when you have a high carrier frequency and an output frequency less than 30 Hz.■ n1-01: Hunting Prevention SelectionNo.(Hex.) Name Description Default(Range)n1-01(0580)Hunting PreventionSelection Sets the function to prevent hunting.0( 0, 1 )Note:When you replace a V1000-series drive with a GA500 drive, set n1-01 = 1 [Hunting Prevention Selection = Enabled].When drive response is more important than the decrease of motor vibration, disable this function.0 : Disable1 : Enabled■ n1-02: Hunting Prevention Gain SettingNo.(Hex.) Name Description Default(Range)n1-02(0581)ExpertHunting Prevention GainSetting Sets the performance of the hunting prevention function. Usually it is not necessary to change thisparameter.1.00(0.00 - 2.50)Adjust this parameter in these conditions:• When n1-01 = 1 [Hunting Prevention Selection = Enabled (Normal)], if oscillation occurs when you operate amotor with a light load, increase the setting value in 0.1-unit increments.• When n1-01 = 2, if the motor stalls, decrease the setting value in 0.1-unit increments.■ n1-03: Hunting Prevention Time ConstantNo.(Hex.) Name Description Default(Range)n1-03(0582)ExpertHunting Prevention TimeConstant Sets the primary delay time constant of the hunting prevention function. Usually it is notnecessary to change this parameter.Determined by o2-04(0 - 500 ms)Adjust this parameter in these conditions:• Load inertia is large: Increase the setting value. If the setting value is too high, response will be slower. Also,there will be oscillation when the frequency is low.• Oscillation occurs at low frequencies: Decrease the setting value.■ n1-05: Hunting Prevent Gain in ReverseNo.(Hex.) Name Description Default(Range)n1-05(0530)ExpertHunting Prevent Gain inReverse Sets the performance of the hunting prevention function. This parameter adjusts Reverse run.Usually it is not necessary to change this parameter.0.00(0.00 - 2.50)Note:When you set n1-05 = 0, the value set in n1-02 [Hunting Prevention Gain Setting] is effective when the motor rotates in reverse.Adjust this parameter in these conditions:V/f OLV OLV/PMOLV/PM AOLV/PM EZOLVV/f OLV OLV/PMOLV/PM AOLV/PM EZOLVV/f OLV OLV/PMOLV/PM AOLV/PM EZOLVV/f OLV OLV/PMOLV/PM AOLV/PM EZOLV
