Subprogram Technique; General Information; Subprogram - Siemens SINUMERIK 840D sl Programming Manual

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3.2 Subprogram technique

Subprogram technique

The term "subprogram" has its origins during the time when part programs were split strictly into

main and subprograms. Main programs were the part programs selected for processing on the

control and then launched. Subprograms were the part programs called from within the main

This strict division no longer exists with today's SINUMERIK NC language. In principle, each

part program can be selected as a main program and launched or called from another part

program as a subprogram.

Accordingly, the subprogram can then be used to refer to a part program called from within

another part program.

As in all high-level programming languages, in the NC language, subprograms swaps out

program sections used more than once to independent, self-contained programs.

Subprograms offer the following advantages:

● Increase the transparency and readability of programs

● Increase quality by reusing tested program parts

● Offer the possibility of creating specific machining libraries

● Save memory space

Main program

Programming Manual, 12/2019, 6FC5398-2EP40-0BA0

NC programming

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Sinumerik 840de sl