Siemens SINUMERIK 840D Function Manual

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Other applications are also possible:● With G0 workpiece delivery and workpiece transport can travel to their end pointsindependently of one another.● On machines with several machining processes in sequence: Significant reduction inindividual machining steps due to block change in the braking ramp of the single-axisinterpolation.NotePositioning axes are not suitable for multi-axis loaders that require interpolation between theaxes (path interpolator).6.2.3 Concurrent positioning axisConcurrent positioning axes are positioning axes with the following properties:● Activation from the PLC need not take place at block limits, but can be implemented at anytime in any operating mode (even when a part program is already being processed in thechannel).● Program command WAITP is required to move a concurrent positioning axis from the partprogram immediately after power ON.● The part program continues to run uninhibited, even if the concurrent positioning axis hasnot reached the position defined by the PLC.● An automatic axis change is possible, depending on the setting in the machine dataMD30552 $MA_AUTO_GET_TYPE.● With programming commands:– GET() or WAITP() becomes a concurrent positioning axis of thechannel axis again.– "RELEASE (axis)" or WAITP() is a channel axis that becomes a concurrentaxis under PLC control.Activation from PLCFor SINUMERIK 840D sl, the concurrent positioning axis is activated via FC 18 from the PLC.● FeedrateFor feedrate = 0, the feedrate is determined from the following machine data:MD32060 $MA_POS_AX_VELO (initial setting for positioning axis velocity)● Absolute dimensions (G90), incremental dimensions (G91)Absolute dimensions along shortest path for rotary axes (name>=DC())The following functions are defined:● Linear interpolation (G1)● Feedrate in mm/min or degrees/min (G94)P2: Positioning axes6.2 Own channel, positioning axis or concurrent positioning axisAxes and spindlesFunction Manual, 06/2019, A5E47437747B AA 191