Trial Operation Procedures4- 11If the values of E2-02 and E2-03 differed greatly from the reference data of the motor in the test report or theinstruction manual, hunting, motor vibrations, insufficient motor torque, or an overcurrent may occur becausethe motor is operated although the aforementioned conditions have not been fulfilled after stationaryautotuning1. For elevators, failure to observe this caution may result in the cage falling or injury. If so, per-form stationary autotuning1 again and run the motor using the aforementioned procedure under the recom-mended conditions or perform stationary autotuning 2 or rotational autotuning.Usually the standard setting for E2-02 is 1 Hz to 3 Hz, and that for E2-03 is 30% to 65% of the rated currentfor a general-purpose motor. Generally, the larger the motor capacity is, the smaller the rated slip and the ratioof the no-load current to the rated current become. Use the data given in Factory Settings that Change withthe Inverter Capacity (o2-04) of Chapter 5 User Constants as a reference.Stationary Autotuning for Line-to-Line Resistance Only (T1-01 = 2)Stationary autotuning for line-to-line resistance only can be used in any control method. This is the onlyautotuning possible for V/f control and V/f control with PG modes.Autotuning can be used to prevent control errors when the motor cable is long (50 m or longer) or the cablelength has changed since installation or when the motor and Inverter have different capacities.Set T1-01 to 2, and then press the RUN Key on the Digital Operator. The Inverter will supply power to the sta-tionary motor for approximately 20 seconds and the Motor Line-to-Line Resistance (E2-05) and cable resis-tance will be automatically measured.Stationary autotuning 2 is used for open-loop vector control and flux vector control. Set T1-04 to 4, and Motorno-load current (T1-09) will be added as a setting item. Input the data from the nameplate. Be sure to input thevalue or motor no-load current (motor exciting current) from motor examination results to T1-09. Afterautotuning, the value of T1-09 will be written in E1-03. When not setting T1-09, the value of Yaskawa stan-dard motor’s no-load current will be written in E1-03.Precautions for Rotational and Stationary AutotuningLower the base voltage based on Fig 4.4 to prevent saturation of the Inverter’s output voltage when the ratedvoltage of the motor is higher than the voltage of the power supply to the Inverter. Use the following proce-dure to perform autotuning.1. Input the voltage of the input power supply to T1-03 (Motor rated voltage).2. Input the results of the following formula to T1-05 (Motor base frequency):(Base frequency from the motor’s nameplate × setting of T1-03)/(Rated voltage from motor’s nameplate)3. Perform autotuning.IMPORTANT1. Power will be supplied to the motor when stationary autotuning 1 is performed even though the motorwill not turn. Do not touch the motor until autotuning has been completed.2. When performing stationary autotuning 1 connected to a conveyor or other machine, ensure that theholding brake is not activated during autotuning.IMPORTANT1. Power will be supplied to the motor when stationary autotuning for line-to-line resistance is performedeven though the motor will not turn. Do not touch the motor until autotuning has been completed.2. When performing stationary autotuning connected to a conveyor or other machine, ensure that theholding brake is not activated during autotuning.IMPORTANT1. Power will be supplied to the motor when stationary autotuning 2 is performed even though the motorwill not turn. Do not touch the motor until autotuning has been completed.2. When performing stationary autotuning 2 connected to a conveyor or other machine, ensure that theholding brake is not activated during autotuning.Stationary Autotuning 2 (T1-01 = 4)
