Trial Operation Procedures4- 9Open-loop Vector Control (A1-02 = 2)Perform autotuning. If the motor can be operated, perform rotational autotuning. If the motor cannot be oper-ated, perform stationary autotuning 1 . Refer to the following section on Autotuning for details onautotuning.Perform autotuning. If the motor can be operated, perform rotational autotuning. If the motor cannot be oper-ated, perform stationary autotuning 1 or 2. Refer to the following section on Autotuning for details onautotuning. AutotuningUse the following procedure to perform autotuning if using the vector control method or the cable length islong, etc. Motor constants will be set automatically.If the control method was changed after autotuning, be sure to perform autotuning again.One of the following four autotuning modes can be set.• Rotational autotuning• Stationary autotuning 1• Stationary autotuning for line-to-line resistance only Precautions Before Using AutotuningRead the following precautions before using autotuning.• Autotuning the Inverter is fundamentally different from autotuning the servo system. Inverter autotuningautomatically adjusts parameters according to detected motor constants, whereas servo system autotuningadjusts parameters according to the detected size of the load.• When speed or torque precision is required at high speeds (i.e., 90% of the rated speed or higher), use amotor with a rated voltage that is 20 V less than the input power supply voltage of the Inverter for 200V-class Inverters and 40 V less for 400V-class Inverters. If the rated voltage of the motor is the same as theinput power supply voltage, the voltage output from the Inverter will be unstable at high speeds and suffi-cient performance will not be possible.• Use stationary autotuning 1 whenever performing autotuning for a motor that is connected to a load.• Use rotational autotuning whenever performing autotuning for a motor that has fixed output characteris-tics, when high precision is required, or for a motor that is not connected to a load.• If rotational autotuning is performed for a motor connected to a load, the motor constants will not be foundaccurately and the motor may exhibit abnormal operation. Never perform rotational autotuning for a motorconnected to a load.• If the wiring between the Inverter and motor changes by 50 m or more between autotuning and motorinstallation, perform stationary autotuning for line-to-line resistance only.• If the motor cable is long (50 m or longer), perform stationary autotuning for line-to-line resistance onlyeven when using V/f control.• The status of the multi-function inputs and multi-function outputs will be as shown in the following tableduring autotuning. When performing autotuning with the motor connected to a load, be sure that the hold-ing brake is not applied during autotuning, especially for conveyor systems or similar equipment.or 2Flux Vector Control (A1-02 = 3)• Stationary autotuning 2or 2
