SinCos encoder error at X8

What does Sd8 mean?

The SinCos encoder at X8 is sending inconsistent data, indicating damaged tracks, high interference levels on the cable, or an open circuit. It could also be due to an incorrect encoder type or improperly set supply voltage.

• Damaged SinCos encoder tracks or internal sensor components due to mechanical shock, vibration, or contamination.
• High electromagnetic interference (EMI) ingress on the SinCos analog signal lines (e.g., Sin+, Sin-, Cos+, Cos-) due to unshielded cabling.
• Open circuit or high resistance in one or more of the SinCos signal wires between the encoder and X8.
• Incorrect termination or differential signaling configuration for the SinCos encoder input at X8, leading to signal distortion.
• Drive parameter (e.g., C0025) configured for a different encoder type (e.g., incremental) instead of SinCos.

Click steps to track your progress.

1. 1

   Power off the drive, disconnect the SinCos encoder cable from X8, and measure the resistance of each signal pair (Sin+, Sin- and Cos+, Cos-) for continuity.

2. 2

   Verify parameter C0025 is set correctly for SinCos encoder type and any associated scaling parameters are accurate.

3. 3

   Using an oscilloscope, monitor the SinCos differential signals (Sin+/Sin- and Cos+/Cos-) at X8 terminals for clean, phase-shifted sine and cosine waves while rotating the motor.

4. 4

   Inspect the SinCos encoder cable for proper shielding connection at both ends and ensure it is routed away from power cables.

5. 5

   Check the encoder's power supply voltage at its terminals to ensure it is within specified limits for stable operation.

6. 6

   If signals are inconsistent, noisy, or absent even after cable verification, consider replacing the SinCos encoder unit.