Servo Configuration Software Mrzjw3setup151e 2021 _verified_ May 2026

| 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). | One of the 2021 version’s standout features is simplified firmware updates. Do this only if absolutely necessary (e.g., to fix a known bug).