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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

dWFL

DriveWorksEZ Fault

Yaskawa · V1000

What does dWFL mean?

This fault signifies an error within the DriveWorksEZ program, indicating a logical or programming issue rather than a drive hardware fault. The program logic is causing an unexpected condition, preventing proper operation. Continued attempts to run without correcting the program could lead to incorrect machine behavior or unexpected stops.

Common Causes

  • General unhandled exception or unspecified error within the DriveWorksEZ user program logic.
  • Attempted access to an invalid or non-existent parameter number or memory address within the DriveWorksEZ program.
  • Corrupted DriveWorksEZ program file that was downloaded, leading to runtime errors or improper execution.
  • Interaction conflict between the DriveWorksEZ program and a drive's internal firmware routine (e.g., attempting to control a parameter managed by a fixed function).
  • Insufficient drive internal memory or processing power for a particularly complex or resource-intensive DriveWorksEZ program.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Connect to the drive with DriveWorksEZ and check the fault log for any additional diagnostic information or error codes related to dWFL.

  2. 2

    Verify the integrity of the DriveWorksEZ program file by comparing checksums or re-opening the file in the editor without errors.

  3. 3

    Perform a parameter initialization (e.g., P1-03 = 2220) and then re-download the DriveWorksEZ program.

  4. 4

    Review all parameter references in the DriveWorksEZ program to ensure they are valid for the specific drive model and firmware version.

  5. 5

    Simplify the DriveWorksEZ program by removing non-essential blocks and testing functionality progressively to isolate the problematic section.

Browse all codes in this manual (87)
Verified technical data. Last updated: April 2026

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Source: Yaskawa V1000
View Official PDFSearch more codes in this manual