Siemens SINUMERIK 840D sl Function Manual page 105

Limitations/secondary conditions
The RESET position with regard to WALIMON / WALIMOF is configurable via:
MD20150 $MC_GCODE_RESET_VALUES (RESET position of G groups)
2.1.8.3 Working area limitation in WKS/ENS
Application
The "working area limitation in WKS/ENS" mainly serves for the working area limitation for
conventional lathes. It enables the machine setter, to "manually" establish "stops" during the
movement of the axes and with that to limit the working area specific to tool.
Working area limitation group
In order not to write the working area limitations afresh every time while switching over to the
transformation or while switching over to the active frames, the user has at his disposal up to
10 working area limitation groups. A working area limitation group contains the values for all
axes in the channel and the coordinate system, for which the working group limitation group
will apply.
The number of the working area limitation groups is set in the machine data:
MD28600 $MC_MM_NUM_WORKAREA_CS_GROUPS
Working area limits
The working area limits of each axis are defined by the following channel-specific system
variables:
System variable
$AC_WORKAREA_CS_PLUS_ENABLE [WALimNo, ax]
$AC_WORKAREA_CS_LIMIT_PLUS [WALimNo, ax]
$AC_WORKAREA_CS_MINUS_ENABLE [WALimNo, ax]
$AC_WORKAREA_CS_LIMIT_MINUS [WALimNo, ax]
Parameter:
<WALimNo>:
<ax>:
The definition is given by writing the system variables through the user interface or in the
part program.
Basic logic functions: Axis monitoring, protection zones (A3)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Significance
Validity of the working area limitation in the positive axis
direction.
Working area limitation in the positive axis direction.
Only effective, if:
$AC_WORKAREA_CS_PLUS_ENABLE = TRUE
Validity of the working area limitation in the negative axis
direction.
Working area limitation in the negative axis direction.
Only effective, if:
$AC_WORKAREA_CS_PLUS_ENABLE = TRUE
Number of the working area limitation group.
Channel axis name of the axis for which the value is valid.
Detailed description
2.1 Axis monitoring
39