SERIAL DATA ERROR(EXT)

What does 385 mean?

This external alarm indicates an interruption in serial communication from the separate detector, potentially due to a disconnected cable, noise, or detector failure. Communication loss means the control unit cannot reliably monitor the detector's position.

• Communication interruption with the separate detector
• Cable disconnection for the separate detector
• Noise interfering with serial data transmission
• Separate detector failure

1. 1

   Check whether the feedback cable is not disconnected and whether the connector is properly plugged.

2. 2

   Check CNC diagnosis information No.356 (Built-in detector) and No.357 (Separate detector) for incremented values, which indicate noise effects. The value is cleared when the CNC unit is powered off.

3. 3

   Replace the detector.