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MELSECNET/H Network System Reference Manual

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This manual provides safety precautions and reference information for the MELSECNET/H network system, specifically for PLC-to-PLC communication using Q-series modules such as QJ71LP21, QJ71BR11, and QJ71NT11B. It covers design precautions, communication failure handling, and interlock circuit requirements to ensure safe operation of programmable controller systems.

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