Protection-Zone Violation And Temporary Enabling Of Individual Protection Zones - Siemens SINUMERIK 828D Function Manual

A3: Axis Monitoring, Protection Zones
2.3 Protection zones
2.3.6

Protection-zone violation and temporary enabling of individual protection zones

Function
Workpiece and tool­related protection zones that are activated or deactivated are monitored for collision. If a
protection-zone violation is detected, behavior in the individual operating modes is as follows.
Terminating temporary enabling
Temporary enabling of a protection zone is terminated after the following events:
• after NC RESET
• Operating modes AUTOMATIC or MDA End of block is outside the protection zone
• Manual operating modes: End of movement is outside the protection zone
• Activating a protection zone
On NC RESET all the enabled protection zones become active again. If the part program or jog mode is started
again, the protection zones must be re­enabled. If the current position lies within a protection zone that becomes
active again after NC RESET, this protection zone must be enabled again on the first path movement.
Preactivated protection zones
Protection zones can be preactivated with part programs. To make them fully operative, they must also be set to
the "operative" state by the PLC.
In contrast to AUTOMATIC mode, a change in the NC/PLC interface signals "Make preactivated protection zones
operative" only has an effect on stationary axes in the geometry system. This means: If an inoperative protection
zone is made "operative" once a motion has been started, it is not evaluated until the axes have stopped,
possibly resulting in the output of an alarm.
If a preactivated protection zone is made "operative" during traversing, the alarm 10704 "Protection-zone
monitoring is not guaranteed" and the PLC interface signal are set:
DB31, ... DBX39.0 (protection-zone monitoring not guaranteed).
Deactivation of tool­related protection zones
Tool­related protection zones can be deactivated only in the part program or, if they have been preactivated, by
being rendered "inoperative" by the PLC.
Geometry axis change and transformation change
Through the following machine data it is adjustable, whether active protection zones are retained or deactivated
during the geometry axis change or transformation change:
MD10618 $MN_PROTAREA_GEOAX_CHANGE_MODE
Bit Value Significance
0 0 Protection zones are deactivated during the transformation change.
1 Active protection zones remain active after a transformation is changed.
1 0 Protection zones are deactivated during the geometry axis change.
1 Active protection zones remain active after a geometry axis change.
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Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions