1010

END Instruction Not Executed

Mitsubishi Electric · MELSEC System Q/L Series

What does 1010 mean?

The entire program was executed without the proper execution of an END instruction. This issue can arise if the END instruction is misread due to electrical noise or if it has been inadvertently changed to another instruction code.

Common Causes

  • Entire program executed without the execution of an END instruction.
  • END instruction was read as another instruction code due to noise.
  • The END instruction has been changed to another instruction code.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Implement noise reduction measures for the control system environment.

  2. 2

    Reset the CPU module and attempt to RUN it again.

  3. 3

    If the same error is displayed again after resetting, diagnose for a CPU module hardware fault.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Mitsubishi Electric MELSEC System Q/L Series