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MELSEC-A/QnA/Q Series PLC Y2K Technical Bulletin
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This technical bulletin provides specific examples of Year 2000 (Y2K) problems that can occur in Mitsubishi MELSEC-A/QnA/Q Series PLC CPU modules due to the internal clock handling year data with only the last two digits. It details circuit examples where processing fails at the year 2000 transition and offers revised program measures to ensure correct operation, including handling of clock data storage devices and relevant commands like DATERD/DATEWR.
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