Fundamental Principles of NC Programming
2.2 Language elements of the programming language
Fundamentals
2-14 Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
• Vocabulary words
• DIN addresses with several letters
• Jump markers
Design
The identifiers are composed of up to 32 characters. The following characters may be used:
• Letters
• Underscore symbols
• Digits
The first two characters must be letters or underscores, separators must not be programmed
between the individual characters (see the following pages).
Example:
CMIRROR, CDON
Note
Reserved vocabulary words must not be used as identifiers. Separators are not permitted
between the individual characters.
Note
Number of characters for each identifier
• Program names: 24 characters
• Axis identifiers: 8 characters
• Variable identifiers: 31 characters
Rules for allocating identifiers
The following rules are provided in order to avoid identifier collisions:
• All identifiers beginning with "CYCLE" or "_" are reserved for SIEMENS cycles.
• All identifiers beginning with "CCS" are reserved for SIEMENS compile cycles.
• User compile cycles begin with "CC”.
• We recommend that users select identifier names, which either begin with "U" (User) or
contain the underscore symbol, because these are not used by the system, compile
cycles or SIEMENS cycles.
Further reserved identifiers
• The identifier "RL" is reserved for conventional turning machines.
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