
3. OPERATION
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1) A larger C language area can be allocated.
Ladder
Normal mode Condensed mode
Object file
C
language
Ladder
↑
C
language
2) Time required for compilation is reduced.
3) Time required for transfer from the personal computer to the
PMC is reduced.
4) A ROM module with a smaller capacity may be used.
On the other hand, condensed mode has the restrictions described
below.
1) Memory map changes (area expansion) are likely to occur when
instructions, symbols, comments, and so forth are added when a
ROM format file generated by compilation in condensed mode
is transferred to the PMC and edited with the built–in editing
function. In this case, the user needs to pay attention to possible
overlap between the ladder area and C language area.
Ladder
Overlap (A C language program
map change is required.)
ROM format file
Ladder
C
language
C
language
2) A ROM format file generated by compilation in condensed mode
cannot be compared with a ROM format file generated by
compilation in normal mode.
D Changing the order of subprograms
When a program is compiled, the source program, subdivided into
subprograms, is converted to a single ROM file. Within the ROM
file, subprograms are arranged in ascending order of subprogram
numbers.