Siemens Sinumerik 840D sl Programming Manual page 352

Supplementary commands
15.3 Working area limitation
Program code
N60 X0
N70 WALIMOF
N80 G1 Z-2 F0.5
N90 G0 Z200
N100 WALIMON
N110 X70 M30
Further information
Reference point at the tool
When tool length offset is active, the tip of the tool is monitored as reference point, otherwise
it is the toolholder reference point.
Consideration of the tool radius must be activated separately. This is done using channel-
specific machine data:
MD21020 $MC_WORKAREA_WITH_TOOL_RADIUS
If the tool reference point lies outside the working area defined by the working area limitation
or if this area is left, the program sequence is stopped.
Note
If transformations are active, the tool data taken into consideration (tool length and tool radius)
can deviate from the described behavior.
References:
Function Manual, Basic Functions; Axis Monitoring, Protection Zones (A3),
Section: "Monitoring the working area limitation"
Programmable working area limitation, G25/G26
An upper (G26) and a lower (G25) working area limitation can be defined for each axis. These
values are effective immediately and remain effective for the corresponding MD setting (→
MD10710 $MN_PROG_SD_RESET_SAVE_TAB) after RESET and after being powered-up
again.
Note
The CALCPOSI subprogram is described in the Job Planning Programming Manual Using this
subprogram before any traversing motion is made, it can be checked as to whether the
predicted path is moved through taking into account the working area limits and/or the
protection zones.
352
Comment
;Deactivate working area limitation
;Drill
;Back
; Switch on working area limitation
; End of program
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals