Block Format - Siemens SINUMERIK 880 Programming Manual

2 Fundamentals of Programming

2.2 Block format

2.2 Block format
A block contains all data required to execute a working step. The block comprises several
words and the " L F " character for "end of block".
The block length is max. 120 characters. The block is displayed in its entirety over several
lines.
Block number
Block structure: Format of a block
The block number is entered under address N or with ":". Block numbers are freely select-
able. A defined block search and defined jump functions are possible only if a block number is
used no more than once in a program.
Programming without a block number is permissible. In this case however, no block search or
jump functions will be possible.
The block format should be made as simple as possible by arranging the words of a block in
the program key sequence.
Block example:
N9235 G . . . X . . . Y . . . Z . . . F . . . S . . . T . . . M . . . H . . .
N Address of block number
9235 Block number
G . . Preparatory function
X . . . Y . . . Z . . . Position data
F . . . Feedrate
S . . . Spindle speed
T . . . Tool number
M . . . Miscellaneous function
H . . . Auxiliary function
L F
End of block
Each block must be terminated with the "L
on the screen as the special character L
does not appear.
If an address character is programmed more than once, the address character programmed
last is valid.
2–2
Block
Word Word
" end-of-block character. This character appears
F
. When the program is printed out, this character
F
© Siemens AG 1991 All Rights Reserved
Word End of block
L F
6ZB5 410-0HD02
SINUMERIK 880, (PG)
05.91