Siemens SINUMERIK 840Di Function Manual page 115

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.
Pre-activated protection zones
Protection zones can be pre-activated 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.
However, the alarm 10704 "Protection zone monitoring not guaranteed" and the PLC
interface signal "Protection zone monitoring not guaranteed" DB31, ...DBX39.0 are output if
a preactivated protection zone is made "operative" while a traversing motion is in progress.
Deactivating tool-related 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 replacement
Machine data can be used to configure protection zones and working area limitations for
geometry axis replacement.
• Protection zones can be activated with:
• Working area limitations can be activated with:
If functions such as protection zone or working area limitation are deactivated during
geometry axis replacement, the bits should be set to zero.
For frames when changing geometry axes, see:
References:
/FB/ Description of Functions Basic Machine; Axis, Coordinate Systems, Frames (K2)
Transformation changeover
Protection zones can also be activated by changing a transformation changeover via
machine data:
MD10618 PROTAREA_GEOAX_CHANGE_MODE, Bit 0 = 1.
Bit 0 = 0 deactivates this function.
Monitoring overlaid movement
Axes that have been assigned to another channel are not taken into account. The last
position to be approached is taken to be the end position. It is not taken into account whether
the axis has traversed after changing channels.
Axis Monitoring, Protection Zones (A3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
MD10618 PROTAREA_GEOAX_CHANGE_MODE, Bit 1 = 1
MD10604 WALIM_GEOAX_CHANGE_MODE, Bit 0 = 1
Detailed Description
2.4 Protection zones
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