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(2) Structuring by dividing into multiple files
A program is stored in a file format.
Changing the file name allows the CPU module to store multiple programs.
GX Developer
Dividing into multiple files according to the processes or functions enables simultaneous programming by two or
more designers. Managing the files separately eases reuse and utilization to other programs.
Structured programming is efficient in this way because only the corresponding file needs to be modified or
debugged in case of change in the specifications.
(a) Dividing into multiple files according to the processes
Processing contents
are divided according
to the processes.
*1: The processing contents divided according to the processes can further be divided and managed according to the
functions.
*2: The execution order can be set in the Program tab of the PLC parameter dialog box. (
1 - 4
File name: PARAM
File name: ABC File name: ABC File name: DEF
Parameter
Program
Figure 1.5 Structuring by dividing into multiple files
Carrying in
Manufacturing
Assembly
Carrying out
Figure 1.6 Dividing into multiple files according to the processes
Multiple programs can be stored
by changing the file name.
Device
Program
comment
*1
Program memory/memory card
Program A
Program B
Program C
Program D
CPU module
Program A to D will
be executed in the
specified order. *2
Section 2.3(2)).
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