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Use a subroutine program for the purposes such as the following.
• Handle the program that is executed several times in one scan as a subroutine program so that the entire
number of steps can be reduced
• Handle the program that is executed under the specific condition as a subroutine program so that the scan
time can be decreased
● A subroutine programs can be managed as one separate program (standby type program).
(
Page 63, Section 2.8.3)
● Subroutine programs can be configured with the nesting. (
Page 269, Section 5.8)
● Using an interrupt pointer in a subroutine program changes the program to an interrupt program.
(
Page 53, Section 2.7)
2.3.4 END Processing
END processing includes the following.
• Auto refresh with intelligent function module
• Intelligent function module dedicated instruction processing
• Device data latch processing
• Service processing
• Watchdog time reset
• Self-diagnostics processing
• Special relay/special register value setting (only for those that should be set during END processing)
When a constant scan is set, the results of processing performed in END processing are held for the period between after
END processing is completed and until the next scan starts.
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