Siemens SINUMERIK 802D sl Function Manual page 326

Reference Point Approach (R1)
18.3 Referencing with distancecoded reference markers
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 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 REFP_VELO_POS (reference point positioning velocity)
MD34100 REFP_SET_POS (reference point value)
The machine axis is referenced. To identify this, the NC sets the relevant interface signal:
V390x 0000.4 = 1 (referenced/synchronized 1)
No travel to target position
The machine axis is now referenced. To identify this, the NC sets the relevant interface
signal:
V390x 0000.4 = 1 (referenced/synchronized 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 REFP_CAM_IS_ACTIVE (axis with reference point cam) = 0
Properties:
● Feed override active.
● The feed stop (channel-specific and axis-specific) is active.
● NC STOP and NC START are active.
Machine axis with reference point cam
MD34000 REFP_CAM_IS_ACTIVE (axis with reference point cam) = 1
326
Meaning
Travel to target position
No travel to target position
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0