Siemens SINUMERIK 828D

A3: Axis Monitoring, Protection Zones
2.3 Protection zones
Basic Functions
116 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
2.3.5 Activation and deactivation of protection zones
General information
The activation status of a protection zone is:
• Preactivated
• Preactivated with conditional stop
• Enabled
• Deactivated
A protection zone is monitored for violation only when it is activated.
Activation
The activation of a protection zone can take place through:
• Part program instruction
• Automatically after the control powers up
• PLC user program
For activation through the PLC user program, the protection zone must be first preactivated via a part
program.
The preactivation, deactivation and activation of all protection zones always takes place channel-specifically. A
protection zone can also be active in multiple channels simultaneously (application example: Double-slide single-
spindle machine with one quill and two machining slides.
Protection zones are activated immediately after the runup of the control, if the corresponding system variable
$SN_PA_ACTIV_IMMED[n] or. $SC_PA_ACTIV_IMMED[n] has been set.
An activated protection zone is only taken into account after the successful referencing of all participating
geometry axes.
File Blocks
_N_INITIAL_INI All data blocks of the protection zones
_N_COMPLETE_PRO All data blocks of the protection zones
_N_CHAN_PRO All data blocks of the channelspecific protection zones
Note
Machine-related protection zones are activated after the runup of the control in all channels.