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CHAPTER2 SEQUENCE PROGRAMS
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2.3 Settings When Program is Divided
2.3.1 Initial execution type program
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2.3.1 Initial execution type program
(1) Definition
Initial execution type program is executed only once when the CPU module is powered on or its
operating status is changed from STOP to RUN.
This type of program can be used as a program that need not be executed from the next scan and
later once it is executed, like initial processing to an intelligent function module.
(2) Processing
(a) Execution order
After completion of all the initial execution type program execution, END processing is performed.
In the next scan and later, scan execution type programs are executed.
Figure 2.19 When processing performed only once is separated as an initial execution type program
Figure 2.20 Execution order of the initial execution type programs
When an initial execution type program is used
Program A
Program B
Control by one program
Processing performed
only once
Processing performed
in every scan
Initial execution type
program
Scan execution type
program
One program can
be divided into two
programs.
Powered off on/
STOP RUN
Initial execution
type program A
Initial execution
type program B
Initial execution
type program n
END processing
1 scan
If there are multiple initial
execution type programs, the
CPU module executes them in
ascending order of the setting.
Scan execution type
program