A3: Axis Monitoring, Protection Zones
2.3 Protection zones
Basic Functions
118 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Deactivation, preactivation, activation via part program
The activation status of a channel- or machine-specific protection zone is defined by the corresponding
subroutine:
• Channel-specific protection zone:
CPROT (n, state, xMov, yMov, zMov)
• Machine or NC-specific protection zone:
NPROT (n, state, xMov, yMov, zMov)
Offsets
During preactivation or activation of the protection zone, an offset can be entered in 0 to 3 dimensions. The offset
refers to:
• Workpiece-related protection zones: Machine zero
• Tool-related protection zones: Tool holder reference point F
Activation via PLC user program
A protection zone preactivated in the part program can be activated in the PLC user program.
Preactivated protection zones
The NC indicates the preactivated protection zones:
DB21, ... DBX272.0 to 273.1 (machine-related protection zone 1 - 10 preactivated)
DB21, ... DBX274.0 to 275.1 (channel-specific protection zone 1 - 10 preactivated)
Protection-zone violation
Activated and preactivated protection zones that are or would be violated by the programmed traversing motions
of the current part-program block if the PLC user program would activate the preactivated protection zone:
DB21, ... DBX276.0 to DBX277.1 (machine-related protection zone 1 - 10 violated).
DB21, ... DBX278.0 to DBX279.1 (channel-specific protection zone 1 - 10 violated).
Parameters Type Description
n
INT Number of protection zone
state
INT Activation status
0 deactivated
1 preactivated
2 activated
3 preactivated with conditional stop
xMov,
yMov,
zMov
REAL Offset values of the previously defined protection zone in the geometry axes
Note
A protection zone cannot be activated in a single channel with different offsets
simultaneously.
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