3 CPU MODULE MEMORY CONFIGURATION
3.1 Memory Configuration
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3
Temporary area
This area is used temporarily by the system during the scan process. It is used as the label defined by the function or the
instruction operand added by the system.
Part of the temporary area is occupied when execution of the function or instruction is started. The area is released when the
execution is completed.
Examples of changes in the state of temporary area when executing a function are shown below.
■Program example
■Changes in the state of temporary area
[FX5S/FX5UJ CPU module]
The capacity of temporary area is 32767 word.
[FX5U/FX5UC CPU module]
The capacity of the temporary area varies according to the program capacity setting.
• 64000 step…700 word
• 128000 step…32767 word
FUN1
(Program file)
Main program
(FUN file)
FUN1 program
(FUN file)
FUN3 program
(FUN file)
FUN2 program
FUN3
FUN2
Execution flow
1
2
3
4
5
7
6
Main program being
executed
Main program being
executed
Main program being
executed
FUN1 being executed
(before FUN3 is called)
FUN1 being executed
(after FUN3 is executed)
FUN3 being executed
FUN2 being executed
Label area of FUN1
Label area of FUN2
Label area of FUN1 Label area of FUN1
Label area of FUN3
1 2 3
4
5 6 7
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