Siemens SINUMERIK 840D sl Function Manual

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(reference point approach velocity)Reference camVelocity(reference point creep velocity)(reference point positioning velocity)Zero markDistanceUHIHUHQFHSRLQWYDOXHMD34100 $MA_REFP_SET_POS [0 ... 3]MD34080 $MA_REFP_MOV_DIST +MD34090 $MA_REFP_MOVE_DIST_CORRMD34040 $MA_REFP_VELO_SEARCH_MARKERMD34070 $MA_REFP_VELO_POSMD34020 $MA_ REFP_VELO_SEARCH_CAMFigure 15-10 Reference point positionWhen the reference point is reached, the machine axis is stopped and the actual-value systemis synchronized with the reference point value n specified by the NC/PLC interface.MD34100 $MA_ REFP_SET_POS[] (reference point value)The selection of the reference point value is performed via the NC/PLC interface:DB31, ... DBX2.4 ... 7 (reference point value 1 ... 4)The actual-value system is synchronized to the reference point value that was selected at thetime the reference cam was reached in Phase 1 (DB31, ... DBX12.7 == 1).The machine axis is now referenced. The interface signal is set as feedback to the PLC userprogram, depending on the active measuring system:DB31, ... DBX60.4/5 (referenced/synchronized 1/2) = 1Features of Phase 3● Feed override active.● Feed stop (channel-specific and axis-specific) is active.● NC stop and NC start are active.R1: Referencing15.5 Referencing with incremental measurement systemsBasic Functions1166 Function Manual, 01/2015, 6FC5397-0BP40-5BA2