Encoder 2: Absolute encoder EnDat, internal fault/error

What does 232111 mean?

The EnDat encoder's internal fault word has set fault bits, indicating a problem with the encoder's internal operation. This could relate to the lighting system, signal amplitude, position value accuracy, or issues with the encoder's power supply (over/undervoltage, overcurrent). The exact fault is detailed in r0949, where each bit represents a specific cause, ranging from a failed lighting system to encoder power supply issues.

• Internal component failure within the secondary EnDat encoder (Encoder 2), such as degradation of the optical system or sensor array.
• Low signal amplitude from Encoder 2 detected by its internal diagnostic, potentially due to internal contamination, aging components, or mechanical issues.
• Checksum errors or inconsistent position data reported by Encoder 2, indicating internal processing errors or data corruption.
• Operating temperature of Encoder 2 exceeding its specified thermal limits, leading to internal component stress and failure.
• Intermittent or unstable power supply to Encoder 2, causing unreliable internal operation and communication errors.

Click steps to track your progress.

1. 1

   Access the drive's diagnostic buffer (r0949 or relevant encoder diagnostic parameter) to determine the specific fault bits reported by Encoder 2 (EnDat fault word).

2. 2

   Power cycle the machine and observe if the fault clears for Encoder 2; transient internal errors can sometimes be reset by a system restart.

3. 3

   Verify the supply voltage to Encoder 2 (e.g., at its connector X21) meets the manufacturer's specification (e.g., 5VDC or 24VDC) using a multimeter.

4. 4

   Inspect the mounting of Encoder 2 and the motor for excessive vibration or mechanical misalignment that could impact encoder longevity and signal quality.

5. 5

   If the fault persists after power cycling and supply voltage verification, plan for replacement of the secondary EnDat absolute encoder (Encoder 2).