I/O Refresh; End Processing - Mitsubishi MELSEC QS Series User Manual

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SEQUENCE PROGRAM EXECUTION

3.3.2 I/O refresh

I/O data between CC-Link Safety master module and network module are refreshed by I/O
refresh.
The I/O refresh is executed before the sequence program operation starts.

3.3.3 END processing

This is a post-processing to return the sequence program execution to step 0 after
completing the whole sequence program operation processing once.
The END processing includes the following.
• Self-diagnostic processing (
• Communication with external device such as GX Developer
• Processing of instructions dedicated to intelligent function modules
• Network refresh processing
• CC-Link Safety refresh processing
• Constant wait processing
• Watchdog timer reset processing (
• Setting values in the special relays/special registers in the set timing END processing.
(
POINT
Appendix 1, Appendix 2
When the constant scan function (
processing is retained during the waiting time after the END processing or before
the next scan.
Section 6.7)
Section 6.15)
)
Section 6.9) is set, the result of END
3.3 Operation Processing
3.3.2 I/O refresh
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