Basic Definitions 04.97
2.2.7 Program structure
A traversing program consists of a number of traversing blocks, which are processed in
ascending order of the block numbers. Start and end of the program need not be marked. The
first traversing block is automatically the start of the program and the last traversing block, the
end of the program. For better readability of the programs, special M-functions which
according to DIN 66025 effect program end (M02, M30) or subroutine end (M17, M29), can be
used.
In principle, subroutines do not differ from main programs, as they become subroutines only
when called from a traversing program, i.e. subroutines can also be run as main programs.
2.3 Traversing blocks
A traversing block contains all data to execute a processing step, e.g. positioning, dwelling or
output of switching functions.
2.3.1 Block structure
A traversing block consists of:
• Character for block start
• Block number
• Number of words containing data for the execution of a processing step
N Block No. Word Word Word
Programming:
N10 G.. X.. Y.. Z.. F.. M.. D..
N20 L.. P..
/ N30 ...
/ . . . . . . . . . . . Skip identifier for skip block
N . . . . . . . . . . Block number
G . . . . . . . . . . G-functions
X, Y, Z . . . . . . Path information of axes (preferably linear axes)
A, B, C . . . . . . Path information of axes (preferably rotary axes)
XY, XZ, AYX, etc. Path information of syncronous axes (selectable aynchronism), the first
axis being the master axis of the synchronism).
Any combinations of axes A, B, C, X , Y, Z are possible, with 2 or 3 digits.
X . . . . . . . . . . Indication of the dwell time
F . . . . . . . . . . Path velocity for interpolation
FX, FY, FZ, etc. Axis velocity for chanining
M . . . . . . . . . . M-function (machine function)
D . . . . . . . . . . Tool offset number
L . . . . . . . . . . Subroutine number
P . . . . . . . . . . Number of loops
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WF 723 C (Programming Guide)
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