Block Elements; Main Blocks And Subblocks - Siemens SINUMERIK 880 Programming Manual

05.91
2.3

Block elements

2.3.1

Main blocks and subblocks

There are two types of block: Main blocks and subblocks.
The main block must contain all words required to start the machining cycle in the program
section beginning there. A main block may only be located in the part program (main program).
A main block is identified by means of the character ":".
A subblock is identified by means of the character "N".
If a block is given a block number, this follows immediately after the ":" or "N" character. The
main blocks and subblocks must be identified by different numbers.
A subblock contains only those functions which differ from the functions in the previous block.
Example main block:
Example subblock:
A program section comprises one main block and several subblocks, e.g.:
L F
:10 G01 X10 Y-15 F200
L F
N20 Y35
L F
N30 X20 Y40
L F
N40 Y–10
© Siemens AG 1991 All Rights Reserved
SINUMERIK 880, (PG)
:10 G01 X10 Y–15 F200 S900 M03
L F
N15 Y20
(Main block)
(1st subblock)
(2nd subblock)
(3rd subblock etc.)
6ZB5 410-0HD02
2 Fundamentals of Programming
2.3 Block elements
L F
2–3