6 Adjustments6.2.2 Procedure for Calculating the Moment of Inertia6-12(2) When Advanced Autotuning Cannot Be PerformedAdvanced autotuning cannot be performed normally under the following conditions. Make adjustments usingone-parameter tuning (Fn203).• The machine system can work only in a single direction.• The operating range is within 0.5 rotation.One-parameter Tuning (Fn203): Refer to 6.3 One-parameter Tuning (Fn203).(3) When Advanced Autotuning Cannot Be Performed SuccessfullyThe moment of inertia cannot be calculated successfully under the following conditions. Make adjustmentsusing one-parameter tuning (Fn203).• The operating range is not applicable.• The moment of inertia changes within the set operating range.• The machine has high friction.• The rigidity of the machine is low and vibration occurs when positioning is performed.• The position integration function is used.• P control operation (proportional control) is used.Note:If a setting is made for calculating the moment of inertia, an error will result when P control operation is selectedusing /P-CON signal while the moment of inertia is being calculated.• The mode switch is used.Note:If a setting is made for calculating the moment of inertia, the mode switch function will be disabled while themoment of inertia is being calculated. At that time, PI control will be used. The mode switch function will beenabled after calculating the moment of inertia.• Speed feedforward or torque feedforward is input.One-parameter Tuning (Fn203): Refer to 6.3 One-parameter Tuning (Fn203).6.2.2 Procedure for Calculating the Moment of InertiaThe procedure to calculate the moment of inertia is given below.Moment of inertia calculation is performed from the digital operator (optional) or SigmaWin+.The procedure from the digital operator is described here.During execution, you cannot change Pn103 (Moment of Inertia Ratio) from the SigmaWin+ or by any othermeans.(1) Operating ProcedureStep Display after Operation Keys Operation1Press the Key to view the main menu for the util-ity function mode. Use the or Key to movethrough the list, and select Fn201.2 Press the Key to display the initial setting screenfor Fn201 (Advanced Autotuning).Only the moment of inertia calculation can be used.3 Press the or Key and set the items in step 3-1.̿㹄㹓㹌㹁㹒㹇㹍㹌̿ࠉࠉࠉࠉࠉࠉ㹀㹀㹄㹬㸮㸯㹃㸸㹑㹴㹋㹭㹲㹍㹮ࠉ㹇㹂㹄㹬㸰㸮㸯㸸㹈㹡㹟㹪㹡㹄㹬㸰㸮㸱㸸㹍㹬㹣㹎㹰㹫ࠉ㹒㹳㹬㹄㹬㸰㸮㸲㸸㸿㸫㹔㹧㹠ࠉ㹑㹳㹮㸿㹒ࠉ㸿㹢㹴㹟㹬㹡㹣㹢ࠉࠉࠉࠉࠉ㹀㹀ࠉ㹑㹲㹰㹭㹩㹣㸻㸩㸮㸮㸶㸮㸮㸮㸮㸮㸦㸮㸮㸮㸱㸬㸮㸧㹰㹣㹴ࠉࠉࠉࠉࠉࠉStatus Display㸿㹒ࠉ㸿㹢㹴㹟㹬㹡㹣㹢ࠉࠉࠉࠉࠉ㹀㹀㹑㹲㹰㹭㹩㹣㸻㸩㸮㸮㸶㸮㸮㸮㸮㸮㸦㸮㸮㸮㸱㸬㸮㸧㹰㹣㹴ࠉࠉࠉࠉࠉࠉ
