Detailed description
2.5 Referencing with distancecoded reference marks
Basic logic functions: Reference Point Approach (R1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
31
Once the parameterized number of reference marks has been crossed, the machine axis is
stopped again and the actual value system of the machine axis is synchronized to the
absolute position calculated by the NC.
Plausiblity check of the reference mark distance
An error occurs if, during reference point traversing for two subsequent reference marks, the
NC determines a distance greater than twice the parameterized reference mark distance.
MD34300 $MA_ENC_REFP_MARKER_DIST (Reference mark distance)
The machine axis will then traverse in opposite direction at half the parameterized reference
point creep velocity (MD34040) and the search for reference mark is restarted.
If a faulty reference mark distance is detected again, the machine axis is stopped and the
reference point traversing is aborted (alarm 20003 "fault in the measuring system").
Abort criterion
If the parameterized number of reference marks is not detected within the parameterized
distance, the machine axis is stopped and reference point traversing is aborted.
MD34060 $MA_REFP_MAX_ MARKER_DIST (max. distance to the reference mark)
Features of phase 1
After phase 1 is successfully completed, the actual value system of the machine axis is
synchronized.
2.5.5 Phase 2: Travel to fixed stop
Phase 2: Start
Phase 2 is automatically started when phase 1 has been completed without an alarm.
Initial situation:
• The machine axis is positioned directly behind the last of the parameterized number of
reference marks.
• The actual value system of the machine axis is synchronized.
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