Siemens SINUMERIK 840D sl Function Manual page 1578

Detailed description
2.5 Referencing with distancecoded reference marks
Phase 2: Sequence
In Phase 2, the machine axis completes reference point approach by traversing to a defined
target position (reference point). This action can be suppressed in order to shorten the
reference point approach:
MD34330 $MA_STOP_AT_ABS_MARKER
Value
0
1
Travel to target position (normal case)
The machine axis accelerates to the parameterized reference point position velocity and
travels to the parameterized target point (reference point):
MD34070 $MA_REFP_VELO_POS (Reference point positioning velocity)
MD34100 $MA_REFP_SET_POS (reference point value)
The machine axis is referenced. To identify this, the NC sets an interface signal for the
measuring system that is currently active:
DB31, ... DBX60.4 / 60.5 (Referenced/Synchronized 1/2) = 1
No travel to target position
The machine axis is now referenced. To identify this, the NC sets an interface signal for the
measuring system that is currently active:
DB31, ... DBX60.4 / 60.5 (Referenced/Synchronized 1/2) = 1
Features of phase 2
Phase 2 will display different characteristics, depending on whether a reference point cam is
parameterized for the machine axis.
Machine axis without reference point cam
MD34000 $MA_REFP_CAM_IS_ACTIVE (Axis with reference point cam) = 0
Properties:
• Feed override active.
• The feed stop (channelspecific and axisspecific) is active.
• NC STOP and NC START are active.
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Meaning
Travel to target position
No travel to target position
Basic logic functions: Reference Point Approach (R1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0