Encoder 2: EnDat internal fault/error

What does 232111 mean?

The EnDat absolute encoder (Encoder 2) has reported an internal fault via its fault word. The fault value (r0949, binary) indicates the specific issue, such as lighting system failure, low signal amplitude, incorrect position value, encoder power supply problems (overvoltage, undervoltage, overcurrent), or a low battery condition. This prevents reliable position feedback.

• Internal hardware failure within the EnDat encoder (e.g., aging optical components, damaged electronics, faulty internal power supply).
• Encoder feedback cable damage (e.g., broken wires, short circuit, poor shielding causing data corruption) between the encoder and the drive input.
• Insufficient or unstable power supply to the encoder (e.g., voltage drop on 5VDC or 10VDC line, noisy supply).
• Incorrect parameterization of the encoder interface on the drive (e.g., P0404 for encoder type, P0408 for EnDat clock frequency).
• Excessive mechanical vibration or shock exceeding the encoder's specified limits, leading to internal component stress.

Click steps to track your progress.

1. 1

   1. Retrieve the detailed fault word from r0949 (binary) or the encoder diagnostic parameters to identify the specific internal EnDat error (e.g., 0x01 for optical failure, 0x02 for voltage low).

2. 2

   2. Check the power supply voltage (e.g., 5VDC or 10VDC) delivered to the EnDat encoder directly at the encoder connector, verifying it is stable and within specification.

3. 3

   3. Inspect the entire length of the EnDat encoder cable for physical damage, proper shielding connection to ground, and secure connections at both the encoder and drive ends.

4. 4

   4. Verify drive parameters related to Encoder 2, specifically P0404 (Encoder type), P0405 (Number of pulses/resolutions), and P0408 (EnDat clock frequency).

5. 5

   5. Temporarily connect a known good EnDat encoder to the drive's Encoder 2 input to determine if the issue is with the encoder itself or the drive's input circuit.