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ErrorLib — Industrial Fault Code Library

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00EC

Block-transfer request in progress

Allen-Bradley · Logix 5000

What does 00EC mean?

A block-transfer request is currently in progress, and a response is required before another request can be initiated. This indicates an attempt to start a new transfer before the previous one completed.

Common Causes

  • There is currently a block-transfer request in progress and a response is required before another request can begin

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the Logix 5000 program logic associated with the block transfer instruction (e.g., MSG) to ensure proper sequencing and completion monitoring before re-enabling.

  2. 2

    Monitor the status bits (e.g., .EN, .DN, .ER) of the block transfer instruction in Studio 5000 Logix Designer to observe its execution cycle and verify proper reset logic.

  3. 3

    Verify the configuration of the block transfer instruction, including the communication path, data size, and target device address, for any discrepancies.

  4. 4

    Check the operational status and responsiveness of the target device with which the Logix 5000 controller is attempting the block transfer.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

00D0No block-transfer response (timeout)00D1Checksum mismatch in read response00D2Read/Write request/response mismatch
Source: Logix 5000
Open Manual (Page 165)Search more codes in this manual