Siemens Sinumerik 840D sl Programming Manual page 35

Commands according to DIN 66025
The commands according to DIN 66025 consist of an address character and a digit or
sequence of digits representing an arithmetic value.
Address character (address)
The address character (generally a letter) defines the meaning of the command.
Examples:
Address character
G
X
S
Digit sequence
The digit sequence is the value assigned to the address character. The sequence of digits can
contain a sign and decimal point. The sign always appears between the address letter and the
sequence of digits. Positive signs (+) and leading zeroes (0) do not have to be specified.
Elements of the NC high-level language
As the command set according to DIN 66025 is no longer adequate for the programming of
complex machining sequences in modern machine tools, it has been extended by the elements
of the NC high-level language.
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Meaning
G function (preparatory function)
Position data for the X axis
Spindle speed
Fundamental Principles of NC Programming
3.2 Structure and contents of an NC program
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