Excessive position fault

What does E.OD mean?

This fault occurs when the actual position deviation in the FR-A800/A800 Plus Series drive exceeds the permitted threshold, typically in applications requiring precise position control with a feedback device. This indicates a failure to maintain the commanded position.

• Incorrect position control parameters (e.g., position loop gains, following error limits) tuned for the mechanical system.
• Mechanical issues such as binding, excessive backlash, a disconnected load, or excessive friction.
• Faulty or misaligned position feedback device (e.g., encoder, resolver) or its wiring.
• Motor not responding adequately to position commands (e.g., undersized motor, motor fault, or insufficient torque).
• Rapid or unrealistic position commands from the external controller.

Click steps to track your progress.

1. 1

   Verify all position control parameters, including position loop gains and following error limits, are correctly tuned for the mechanical system and application.

2. 2

   Inspect the mechanical system for any binding, excessive friction, backlash, or disconnection between the motor and the load.

3. 3

   Check the position feedback device (e.g., encoder) for proper operation, secure mounting, and signal integrity. Verify wiring to the FR-A800/A800 Plus Series drive.

4. 4

   Monitor the commanded position and actual position feedback through the drive's display or FR Configurator2 to assess the deviation.

5. 5

   Reduce the commanded acceleration/deceleration rates or velocity limits from the external controller to determine if the fault can be avoided.