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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.

dWF2

DriveWorksEZ Fault 2

Yaskawa · GA500 Maintenance and Troubleshooting

What does dWF2 mean?

This fault indicates an issue originating from the DriveWorksEZ program itself, not a drive hardware fault. It signifies a problem with the user-defined logic or configuration which prevents proper program execution on the drive.

Common Causes

  • Syntax error or logical inconsistency within the user-programmed DriveWorksEZ sequence.
  • Incorrect data type or range assignment for a variable in the DriveWorksEZ program.
  • DriveWorksEZ program attempting to access an invalid memory address or non-existent parameter.
  • Infinite loop or resource contention within the custom DriveWorksEZ logic causing system hang.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Connect to the drive using DriveWorksEZ software and upload the current program.

  2. 2

    2. Review the DriveWorksEZ program code for logical errors, infinite loops, or incorrect variable usage.

  3. 3

    3. Debug the DriveWorksEZ program using simulation mode, observing variable states and program flow.

  4. 4

    4. Verify all parameter references (e.g., P1-01, H1-01) within the DriveWorksEZ logic are valid for the drive model.

  5. 5

    5. Download a previously working version of the DriveWorksEZ program, if available, to isolate the issue to recent changes.

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

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CECommunication Data ErrorCFControl FaultCP1Comparator 1 Limit Error
Source: Yaskawa GA500 Maintenance and Troubleshooting
View Official PDFSearch more codes in this manual