Motor speed feedback missing

What does 7301 mean?

No motor speed feedback signal was received by the ACS880 drive. This indicates an issue with the feedback device (e.g., encoder, resolver), its cabling, or its configuration, which is critical for accurate motor control.

• Incorrect setting of parameter 90.41 Motor feedback selection, pointing to a non-existent or wrong feedback source.
• Disconnected, loose, or faulty motor feedback device (e.g., encoder, resolver) or its power supply.
• Broken or incorrectly wired cable between the feedback device and the drive's interface module (FEN-xx).
• Incorrectly installed or faulty encoder/resolver interface module (FEN-xx).
• Damage to the motor feedback device (e.g., encoder sensor, disc) itself.

Click steps to track your progress.

1. 1

   Check parameter 90.41 Motor feedback selection to ensure the correct feedback source (e.g., FEN-11, FEN-21) is selected and enabled.

2. 2

   Inspect the physical connection of the motor feedback device (encoder/resolver) to the drive's interface module (FEN-xx) for looseness or damage.

3. 3

   Verify the wiring between the feedback device and the drive for continuity, correct pin assignments, and proper shielding.

4. 4

   Check the feedback device for proper operation and power supply; measure voltage at the device if possible.

5. 5

   Ensure the encoder/resolver interface module (FEN-xx) is correctly installed, seated, and configured according to the hardware manual.