How to perform motor identification in MM4? How to judge the effectiveness of the device in identifying the motor? I think the following points should be noted: When performing quick commissioning, it is essential to follow the guidance process given in the manual, especially ensuring that the motor nameplate data is entered accurately. If the motor nameplate data is entered incorrectly, the motor modeling will not be accurate, and the control will not achieve good operating results. The motor nameplate data includes: rated voltage, rated current, rated power, rated speed, and rated power factor. If it is vector control, the rated excitation current also needs to be determined. Regarding the rated speed, Chinese motor standards stipulate that this item is not included in the nameplate data, so this parameter must be obtained from the motor manufacturer. You need an accurate slip or rated speed value. The power factor parameter can be calculated based on the nameplate data once the motor is determined, or you can obtain an accurate value from the motor manufacturer. The rated excitation current can be automatically calculated through quick commissioning and displayed in r0331, but generally, this internally calculated parameter is not accurate; the measured value is closer to the actual data of the motor. The specific methods for determining this are rather verbose; it is best to carefully read and understand the relevant discussions in the instruction manual. In summary, accurately determining the motor nameplate data is more challenging in vector control and the measurement of magnetizing current. V/F control and parabolic control are much simpler. Regardless of complexity, accurately setting the motor nameplate data is crucial. This is the foundation for the device's motor identification. The manual includes an equivalent circuit for the motor; the device's motor identification essentially involves determining the parameters within that equivalent circuit—this is called modeling. For V/F and parabolic control, during rapid commissioning, P3900=1/2/3 must truly pass, followed immediately by P1910=1. After the ON closing command, automatic identification is completed without any P0041 fault occurring. This indicates successful identification. For vector control P1300=20/21/22/23, not only must P1910=1 automatically pass, but P1910=3 must also automatically pass, and P1960=1 must automatically pass. Only then is the self-identification process considered successful. To verify the effectiveness of the self-identification, run the motor under no-load across its entire speed range and use your hands and ears to determine if there is any noticeable electromagnetic noise or vibration during operation. Generally, after correctly completing the two identification steps mentioned above, the motor should run smoothly and stably, unless there is a mechanical problem or poor dynamic balance causing mechanical vibration and noise. How to distinguish between mechanical and electromagnetic noise is left to your own analysis; it will not be elaborated here. In vector control, for coaxial connections with large inertia rollers, the MM4 can also perform inertia compensation. Specific settings and adjustments are detailed in the relevant function diagrams and parameter tables in the manual, omitted here. In short, the actual operating performance of the motor is the best test of the quality of the debugging work.