d3
Serial data destroyed by noise
Fanuc · Series 30i/31i/32i-MODEL B Plus
What does d3 mean?
Serial data transmitted between the sensor (serial) and the Spindle Amplifier was detected as corrupted by noise. This indicates a problem with the cable's shielding, external electrical interference, or the overall integrity of the data transmission path. Data corruption can lead to incorrect feedback or control.
Common Causes
- Noise interference affecting serial data transmission
- Inadequate shielding of the cable between the sensor (serial) and Spindle Amplifier
Repair Steps
- 1
Check the shielding effectiveness of the cable between the sensor (serial) and Spindle Amplifier.
- 2
Review the 'Detectors' section in the FANUC SERVO AMPLIFIER αi series Descriptions (B-65282EN) for specific cable requirements and grounding practices.
Verified technical data. Last updated: March 2026
Source: Fanuc Series 30i/31i/32i-MODEL B Plus