User`s manual

3
SEQUENCE PROGRAM EXECUTION
3.3 Operation Processing
3.3.3 I/O refresh
3 - 8
1
Overview
2
Performance Specification
3
Sequence Program Configuration and Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files Handled by CPU Module
6
Functions
7
Communication with Intelligent Function Module
8
Parameters
3.3.3 I/O refresh
I/O data between CC-Link Safety master module and MELSECNET/H module is refreshed
by I/O refresh.
I/O refresh is followed by CC-Link Safety and MELSECNET/H refresh.
3.3.4 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 ( Section 6.7)
• Communication with GX Developer
• Watchdog timer reset processing ( Section 6.15)
• Setting values in the special relays/special registers in the set timing END processing.
(
Appendix 1, Appendix 2)
• Constant wait processing
POINT
When the constant scan function( Section 6.9) is set, result at END
processing is stored until when END processing is completed or the next scan
starts.