Status Indicator Identification
The multi-color LED indicator group on the driver panel can intuitively reflect the operating status of the equipment. Solid green indicates normal operation, while flashing red indicates an alarm code; the specific fault type needs to be interpreted in conjunction with the equipment manual. Rapid flashing usually indicates overcurrent protection, while slow flashing may indicate encoder communication abnormalities.
Motor Driver
Waveform Analysis of Output Signals
Use an oscilloscope to test the pulse waveform at the UVW three-phase output terminals. Under normal conditions, it should present a regular PWM modulation waveform with stable amplitude and accurate phase difference. If waveform distortion, amplitude fluctuations, or phase disorder occur, it indicates an abnormality in the power module or control circuit.
Comprehensive Testing of the Power Supply System
Measure the voltage fluctuation range at the main power input terminal; the allowable deviation for a 380VAC system is ±10%. The DC bus voltage should be checked simultaneously and should remain stable when the braking resistor is working. Power supply abnormalities will cause the driver to frequently trigger undervoltage or overvoltage protection.
Monitoring Temperature Parameters
Use an infrared thermometer to detect the heat sink temperature; under normal operating conditions, it should be below 65℃. Abnormal temperature rise may originate from a malfunctioning cooling fan or performance degradation of the IGBT module, requiring precise diagnosis using a thermal imaging camera.
Communication Interface Function Verification Send test commands via RS485 or EtherCAT interface to verify the response time of control signals and the integrity of data packets. Communication delays exceeding 5ms or data packet loss indicate the need to check the interface circuitry or replace the communication cable.
A systematic testing process should include all the above items; regular execution can effectively prevent sudden failures. During testing, strict adherence to the technical specifications provided by the equipment manufacturer is essential to ensure the accuracy of the evaluation results.