I/O Refresh Timing; Cyclic Refresh - Omron CJ2 CPU UNIT SOFTWARE User Manual

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I/O Refresh Timing

The 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 Refresh
With cyclic refreshing, I/O refreshing is all performed at once after execution of all the cyclic tasks in
READY status has been completed.
Top
LD 1.01
OUT 2.09
END
Top
MOV 3 4
END
I/O refresh
Execute an IORF(097) instruction for all required words prior to the END(001) instruction if I/O refresh-
ing is required in a task.
CJ2 CPU Unit Software User's Manual
Cyclic refresh
(batch processing)
All real I/O data
5 Understanding Programming
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