Siemens SINUMERIK 840DE Programming Manual page 49

Character set
The following characters are available for writing NC programs:
Uppercase characters
A, B, C, D, E, F, G, H, I, J, K, L, M, N,(O),P, Q, R, S, T, U, V, W, X, Y, Z
Please note:
Take care to differentiate between the letter "O" and the digit "0".
Lowercase letters
a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z
Note
No distinction is made between upper and lower case letters.
Digits
1, 2, 3, 4, 5, 6, 7, 8, 9
Special characters
%
(
)
[
]
<
>
:
=
/
*
+
-
"
'
$
_
?
!
.
,
;
&
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
2.2 Language elements of the programming language
Program start character (used only for writing programs on an external PC)
For bracketing parameters or expressions
For bracketing parameters or expressions
For bracketing addresses or indexes
For bracketing addresses or indexes
Less than
Greater than
Main block, end of label, chain operator
Assignment, part of equation
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
Fundamental Principles of NC Programming
2-3