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MELSEC-A/QnA Series CPU Module Battery Life Technical Bulletin
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This technical bulletin addresses a significant reduction in actual battery service life for specific MELSEC-A/QnA series CPU modules due to a change in the SRAM memory used for sequence program storage. It details the affected models, the hardware version changes, the new shorter battery life values at different ambient temperatures, and recommends corrective actions to mitigate system impact.
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