4506

Following error window (position) not allowed

Beckhoff · TwinCAT 2 NC

What does 4506 mean?

The value configured for the following error window (maximum allowable position following error) is not allowed, as it must be within the range [0.0, 10000.0]. This parameter defines the maximum permissible deviation between the target and actual position. An invalid window can cause false fault triggers or fail to detect actual tracking errors, risking collisions.

Common Causes

  • Parameter Px-02 (position following error window) is configured to a value outside the allowed range of [0.0, 10000.0] units.
  • The motion controller is attempting to write an out-of-range value for the position following error window to the drive.
  • An imported parameter file contains an invalid value for the position following error window due to a configuration error.
  • Data corruption occurred when saving the position following error window parameter, resulting in an unreadable or invalid value.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Access the drive's parameter settings via the commissioning software or display panel to locate the position following error window parameter (e.g., P5-02).

  2. 2

    Verify that the current value of parameter P5-02 is strictly within the allowed range of [0.0, 10000.0] as specified in the drive's documentation.

  3. 3

    Adjust the position following error window parameter (e.g., P5-02) to a value suitable for the application (e.g., 50.0 encoder counts) and within range.

  4. 4

    Save the modified parameter configuration to the drive's non-volatile memory and execute a drive reset.

  5. 5

    Confirm the PLC/controller is sending a valid setpoint for the following error window by monitoring the communication data.

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Verified technical data. Last updated: March 2026

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