If X0=ON, the program executes as the arrow.
If X0=OFF, the CALL instruction will not work; only the main program works.
The notes to write the subprogram:
Please programming the tag after FEND. Pn is the start of subprogram; SRET is the end of
subprogram. CALL Pn is used to call the subprogram. The range of n is 0 to 9999.
The subprogram calling can simplify the programming. If the program will be used in many
places, make the program in subprogram and call it.
4-3-3. Flow [SET], [ST], [STL], [STLE]
Summary
Instructions to specify the start, end, open, close of a flow;
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