Analog encoder defective

What does Sd1 mean?

This fault indicates a problem with an analog encoder providing feedback to the drive, such as a broken wire, short circuit, or the encoder itself being faulty. By default, this critical condition triggers a full TRIP, inhibiting all ignition pulses and resetting the Ready signal, as accurate feedback is essential for stable and safe control. Manual reset is required.

Complete Troubleshooting Guide

1. 1

   Check encoder wiring: Inspect all cables connecting the analog encoder to the drive for continuity, shorts, and proper shielding.

2. 2

   Verify encoder power supply: Ensure the encoder is receiving its correct supply voltage from the drive or external source.

3. 3

   Check encoder output signal: Measure the analog output signal from the encoder directly to verify it's within the expected range and stable.

4. 4

   Inspect encoder mounting: Ensure the encoder is securely mounted and not damaged or misaligned.

5. 5

   Replace encoder: If wiring and power are confirmed good, the encoder itself may be faulty and require replacement.