Restrictions In Protection Zones - Siemens SINUMERIK 828D Function Manual

Temporary enabling of protection zones
Protection zones can be enabled in JOG mode when:
1. the current position is within a protection zone (alarm active)
2. a motion is to be started on the protection zone limit (alarm active)
A protection zone is enabled when:
• a positive signal edge arrives at the PLC interface "Temporary enabling of protection zones" (this enable
resets the active alarm).
• if the axis then starts to move again into the same protection zone.
Start of the motion causes:
• the protection zone to be enabled
• the appropriate PLC interface signals "Machine­specific or channel­specific protection zone violated" to be
set.
• the axis to start moving.
The enabling signal is canceled if a motion is started that does not lead into the enabled protection zone.
If the current position is located in other active protection zones or the limit for other protection zones must be
crossed with the motion that has been started, then alarms 10702, 10703 or 10706, 10707 are output. The PLC
interface signal "Temporary enabling of protection zones" can be set again to enable the protection zone for
which an alarm is output.
The enabling signals for the individual protection zones are still valid on switchover to operating modes
AUTOMATIC or MDA, and vice versa, the enabling signals of protection zones that were output in AUTOMATIC
and MDA remain valid.
If the end position is located outside the relevant protection zone the next time the axes in the geometry system
stop:
• ?the enabling signals of the individual protection zones are canceled
• the appropriate PLC interface signal "Machine­specific or channel­specific protection zone violated" is reset.
2.3.7

Restrictions in protection zones

Restrictions in protection-zone monitoring
No protection-zone monitoring is possible under the following conditions:
• Orientation axes
• Protection-zone monitoring for fixed machine-related protection zones with transmit or peripheral surface
transformation.
Exception: Protection zones defined with rotation symmetry around the spindle axis. Here, no DRF offset
must be active.
• Mutual monitoring of tool-related protection zones
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
A3: Axis Monitoring, Protection Zones
2.3 Protection zones
125