Siemens SINUMERIK 840D sl Function Manual page 111

Requirement
The channel axes must be referenced.
Working area limitation group
In order that the axis-specific working area limits do not have to be rewritten for all channel
axes when switching axis assignments, e.g. when switching transformations or the active
frame on/off, working area limitation groups are available.
A working area limitation group comprises the following data:
● Working area limits for all channel axes
● Reference system of the working area limitation
The number of the working area limitation groups is set in the machine data:
MD28600 $MC_MM_NUM_WORKAREA_CS_GROUPS
Set working area limits
The working area limits are set channel-specifically for each channel axis via the following
system variables:
● $P_WORKAREA_CS_LIMIT_PLUS[<group>, <channel axis name>]
● $P_WORKAREA_CS_LIMIT_MINUS[<group>, <channel axis name>]
With <group> = number of the working area limitation group
Enable working area limits
The working area limits are enabled channel-specifically for each channel axis via the following
system variables:
● $P_WORKAREA_CS_PLUS_ENABLE[<group>, <channel axis name>]
● $P_WORKAREA_CS_MINUS_ENABLE[<group>, <channel axis name>]
With <group> = number of the working area limitation group
There is no activation through the enable.
Select reference system
The reference system for a working area limitation group is set via the following system variable
for each specific channel:
$P_WORKAREA_CS_COORD_SYSTEM[<group>] = <value>
<value>
1
3
With <group> = number of the working area limitation group
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Meaning
Working area limitation based on the workpiece coordinate system
Working area limitation based on the AZS
A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
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