Subprogram Names - Siemens Sinumerik 840D sl Programming Manual

Flexible NC programming
1.25 Subprogram technique
Application
As in all high-level programming languages, in the NC language, subprograms are used to
swap 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
1.25.1.2

Subprogram names

Naming rules
The following rules must be observed with regard to naming subprograms:
• The first two characters must be letters (A - Z, a - z).
• The following characters can be any combination of letters, numbers (0 to 9), and
underscores ("_").
• A maximum of 31 characters may be used.
Note
The SINUMERIK NC language does not distinguish between uppercase and lowercase
letters.
Program name expansion
The program name assigned when the program is created is expanded within the control with
the addition of a prefix and a suffix.
• Prefix: _N_
• Suffix:
-
-
162
Main programs: _MPF
Subprograms: _SPF
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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