4110

SP.CONTSW Instruction Invalid Value

Mitsubishi Electric · MELSEC-Q/L Common Instruction

What does 4110 mean?

This error indicates that the value specified at parameter (S) for the SP.CONTSW instruction is 0. This is an invalid input parameter for the system switching command, which prevents the instruction from executing correctly and thus blocks any attempted system switching operation.

Common Causes

  • The value specified at (S) for the SP.CONTSW instruction is 0.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the value specified at (S) for the SP.CONTSW instruction in the program is a non-zero value.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Mitsubishi Electric MELSEC-Q/L Common Instruction