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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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5 Understanding Programming5-6-4 I/O Refresh TimingThe following methods are used to refresh external I/O.• Cyclic refresh• Immediate refresh (instruction with the ! specification, IORF(097), FIORF(225), or DLNK(226))Cyclic RefreshWith cyclic refreshing, I/O refreshing is all performed at once after execution of all the cyclic tasks inREADY status has been completed.TopLD 1.01OUT 2.09ENDTopMOV 3 455-6 InstructionsENDI/O refreshCyclic refresh(batch processing)All real I/O dataExecute an IORF(097) instruction for all required words prior to the END(001) instruction if I/O refreshingis required in a task.5-6-4 I/O Refresh Timing<strong>CJ2</strong> <strong>CPU</strong> <strong>Unit</strong> <strong>Software</strong> User’s <strong>Manual</strong>5-79

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