Siemens SINUMERIK 840D sl Function Manual page 146

A3: Axis Monitoring, Protection Zones
3.3 Protection zones
After the end of the traversing motion, the alarm is cleared automatically. If the current position
is within an activated or preactivated protection zone, the following is performed:
● Alarm 10702 or 10703 is displayed
● Further traversing motions are disabled
● The NC/PLC interface signal for the relevant protection zone is set
DB21, ... DBX276.0 - 277.1 or DBX278.0 - 279.1 (protection zone violated)
To continue, see the paragraph below "Temporary enabling of protection zones" and Section
"Activating and deactivating protection zones (Page 140)".
Example: Three protection zones activated and simultaneous traversing of two geometry
axes
Figure 3-14
At the start time of the traversing motions of the axes X and Y, the axial traversing range limits
are determined from the start time:
● X axis
– Positive traversing direction: Protection zone 2
– Negative traversing direction: Absolute traversing range limit, e.g. software limit switch
● Y axis
– Positive traversing direction: Protection zone 1
– Negative traversing direction: Absolute traversing range limit, e.g. working area limitation
146
Motion range of the geometry axes at the start time
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions