Tool Offsets; Spindle Motion; Feed Control; Program Header - Siemens Sinumerik 840D sl Programming Manual

Special characters
/
*
+
-
"
'
$
s_
?
!
.
,
;
&
LF
Tab character
Blank
Note
Take care to differentiate between the letter "O" and the digit "0".
Note
No distinction is made between uppercase and lowercase characters (exception: tool call).
Note
Non-printable special characters are treated like blanks.
4.3

Program header

The NC blocks that are placed in front of the actual motion blocks for the machining of the
workpiece contour are called the program header.
The program header contains information/statements regarding:
● Tool change
● Tool offsets
● Spindle motion
● Feed control
● Geometry settings (zero offset, selection of the working plane)
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Meaning
Division, block suppression
Multiplication
Addition
Subtraction, minus sign
Double quotation marks, identifier for character string
Single quotation marks, identifier for special numerical values: hexadecimal,
binary
System variable identifiers
Underscore, belonging to letters
Reserved
Reserved
Decimal point
Comma, parameter separator
Comment start
Format character, same effect as space character
End of block
Separator
Separator (blank)
Creating an NC program
4.3 Program header
43