Activating/Deactivating Protection Zones (Cprot, Nprot) - Siemens SINUMERIK 840D sl Programming Manual

Work preparation
3.6 Protection zones
General conditions
During the definition of a protection zone, the following functions must not be active or used:
● Tool radius compensation (cutter radius compensation, tool nose radius compensation)
● Transformation
● Reference point approach (G74)
● Fixed point approach (G75)
● Dwell time (G4)
● Block search stop (STOPRE)
● End of program (M17, M30)
● M functions: M0, M1, M2
3.6.2

Activating/deactivating protection zones (CPROT, NPROT)

Protection zones previously defined in the part program can be activated at any time – or can
be preactivated for subsequent activation by the PLC user program. Active protection zones
can be deactivated at any time.
When activating or preactivating, it is also possible to relatively shift the reference point of the
protection zone.
Note
A protection zone is only taken into account after the referencing of all geometry axes of the
channel in which it has been activated.
Note
Monitoring protection zones
If a tool-related protection area is not active, the tool path is checked against the workpiece-
related protection zones.
If no workpiece-oriented protection zone is active, then there is no protection zone monitoring.
Syntax
CPROT(<n>,<Status>,<XMov>,<YMov>,<ZMov>)
NPROT(<n>,<Status>,<XMov>,<YMov>,<ZMov>)
Meaning
CPROT:
NPROT:
578
Predefined procedure to activate a channel-specific protection
zone
Predefined procedure to activate a machine-specific protection
zone
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming