Definition Via System Variable - Siemens SINUMERIK 828D Function Manual

A3: Axis Monitoring, Protection Zones
2.3 Protection zones
End of definition
The end of definition is defined by the following subroutine:
EXECUTE(NOT_USED)
Parameters Type
INT
NOT_USED
The definition of a machine-specific or channel-specific protection zone is completed with the subroutine
EXECUTE(n).
2.3.4

Definition via system variable

General
If the protection zones are defined with part program instructions (see Chapter: Definition for each part program
instructions), the protection zone data are stored in system variables. The system variables can also be written
directly so that the definition of protection areas can also be performed directly in the system variables.
The same supplementary conditions apply for the definition of the contour of a protection zone as for a
protection-zone definition via part program instructions.
System variables
The protection zone definitions cover following system variables:
System variable
$SN_PA_ACTIV_IMMED[n]
$SC_PA_ACTIV_IMMED[n]
$SN_PA_T_W[n]
$SC_PA_T_W[n]
$SN_PA_ORI[n]
$SC_PA_ORI[n]
114
Description
Error variable has no effect in protection zones with EXECUTE.
Type Significance
BOOL Activation type
The protection zone is active/not active immediately after
the power up of the control and the referencing of the axes.
FALSE
TRUE
INT Protection zone type
0 Workpiece-related protection zone
1 reserved
2 reserved
3 Tool-related protection zone
INT Orientation of the protection zone, i.e. polygon definition in
the plane of:
0 1. and 2nd geometry axis
1 3. and 1st geometry axis
2 2. and 3ard geometry axis
not immediately active
immediately active
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions