| Symptom | Likely Cause | Solution | |---------|--------------|----------| | “Cannot open COM port” | Driver conflict or another app (e.g., PLC software) has the port locked. | Close other apps, use Mode command in Device Manager to uninstall/reinstall driver. | | Servo oscillates (buzzing) | Gains too high. | Reduce P-gain by 30% and increase D-gain slightly. | | Alarm A.10 (Undervoltage) | Main power supply sagging or missing phase. | Check input voltage (200V or 400V class). Add a line reactor. | | Encoder counting backwards | Wrong rotation direction setting. | Toggle Pn000.0 (0→1 or 1→0), then power cycle. | | Communication timeout | Baud rate mismatch. | Set both software and drive to 19200 bps (most reliable). |
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If you can share the (e.g., MR-J3-10A, MR-J4-40B), I can give more precise guidance. | Symptom | Likely Cause | Solution |
MRZJW3-SETUP151E is a configuration and maintenance software package designed for Mitsubishi Electric’s AC servo amplifiers. It serves as the primary interface for engineers and technicians to parameterize, tune, and troubleshoot Mitsubishi servo drives. The "151E" denotes a specific version iteration compatible with the series (and backward compatible with J3/J2-Super), which includes advanced tuning and safety function configuration capabilities. | Reduce P-gain by 30% and increase D-gain slightly