Siemens Sinumerik 840D sl Programming Manual page 505

System variables
The G0 tolerance factor, effective in the part program or in the actual IPO block, can be read
using system variables.
• In synchronized actions or with preprocessing stop in the part program via system
variable:
• Without preprocessing stop in the part program via system variable:
If no value with STOLF is programmed in the active part program, then these two system
variables supply the value set using MD20560 $MC_G0_TOLERANCE_FACTOR.
If no rapid traverse (G0) is active in a block, then these system variables always supply a
value of 1.
Example
Program code
COMPCAD G645 G1 F10000
X... Y... Z...
X... Y... Z...
X... Y... Z...
G0
G0
CTOL=0.02
STOLF=4
G1 X... Y... Z...
X... Y... Z...
X... Y... Z...
G0 X... Y... Z...
X... Y... Z...
Job planning
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
$AC_STOLF Active G0 tolerance factor
G0 tolerance factor, which was effective when processing the
actual main run block.
$P_STOLF Programmed G0 tolerance factor
X... Y... Z...
X... Y... Z...
8.9 Tolerance for G0 motion (STOLF)
Comment
; Compressor function COMPCAD
; The machine and setting data apply here.
; Machine data $MC_G0_TOLERANCE_FACTOR (e.g. =3), is
effective here, i.e. a smoothing tolerance of
$MC_G0_TOLERANCE_FACTOR*$MA_COMPRESS_POS_TOL.
; A contour tolerance of 0.02mm is applied starting from
here.
; From here, a G0 tolerance factor of 4 applies, i.e. a
contour tolerance of 0.08mm.
Path traversing behavior
505