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CJ2 CPU Unit Software User's Manual - CIP ETI

CJ2 CPU Unit Software User's Manual - CIP ETI

CJ2 CPU Unit Software User's Manual - CIP ETI

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6 I/O Memory AreasDM Area Allocations to Special I/O <strong>Unit</strong>s and <strong>CPU</strong> Bus <strong>Unit</strong>sParts of the DM Area are allocated to Special I/O <strong>Unit</strong>s and <strong>CPU</strong> Bus <strong>Unit</strong>s for functions, such as initial<strong>Unit</strong> settings. These words can be used for general data storage if the corresponding <strong>Unit</strong> is not used inthe PLC.The timing for data transfers is different for these <strong>Unit</strong>s, but may occur at any of the three followingtimes.• Transferring data when the PLC’s power is turned ON or the <strong>Unit</strong> is restarted• Transferring data once each cycle• Transferring data when requiredRefer to the <strong>Unit</strong>’s operation manual for details on data transfer timing.D0WordD20000D29599DM Area words for Special I/O <strong>Unit</strong>s100 words/<strong>Unit</strong>D30000D31599DM Area words for <strong>CPU</strong> Bus <strong>Unit</strong>s100 words/<strong>Unit</strong>66-13 Data Memory AreaD32767<strong>CJ2</strong> <strong>CPU</strong> <strong>Unit</strong> <strong>Software</strong> User’s <strong>Manual</strong>6-25

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