00EE

Invalid block-transfer request type

Allen-Bradley · Logix 5000

What does 00EE mean?

The type of block-transfer request is not consistent with the expected BT_READ or BT_WRITE types. This indicates an incorrect command type was issued for the block transfer.

Common Causes

  • The type of block-transfer request is not consistent with the expected BT_READ or BT_WRITE

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the `MSG` instruction configuration, specifically the 'Message Type' (BT_READ/BT_WRITE) and 'Data Table Address' for consistency.

  2. 2

    Inspect the target intelligent module's configuration in the I/O tree to ensure it aligns with the block-transfer request type.

  3. 3

    Review the ladder logic or structured text associated with the `MSG` instruction for any conditions that could issue an incorrect command type.

  4. 4

    Check for controller and module firmware compatibility issues related to block transfer operations.

  5. 5

    Verify the data structure (tag) utilized by the `MSG` instruction matches the expected format for the block transfer.

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Verified technical data. Last updated: March 2026

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