Siemens SINUMERIK 840D sl Function Manual

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19.12 Feeds (V1)19.12.1 Signals to channel (DB21, ...)DB21, ...DBX0.6 Activate dry run feedEdge evaluation: Yes Signal(s) updated: CyclicallySignal state 1 oredge change0 → 1The dry run feedrate defined using the setting data:SD42100 $SC_DRY_RUN_FEEDis used instead of the programmed feed (for G01, G02, G03) if the dry run feedrate is greater thanthat programmed.The dry run feedrate is effective after the reset state.This interface signal is evaluated at NC start when the channel is in the "reset" state.The dry run feed can be activated from the PLC or operator panel.When selected from the operator panel front, the PLC interface signal:DB21, ... DBX24.6 (dry run feed selected)is set and transferred from the PLC basic program to the interface signal:DB21, ... DBX0.6 (activate dry run feed).When selected using the PLC, the IS "activate dry run feed" should be set from the PLC user program.Signal state 0 oredge change1 → 0The programmed feed is used.Effective after the reset state.Application exam‐ple(s)Testing a workpiece program with an increased feedrate.Special cases,errors, ......If the signal changes to "0" within a G33 block, the programmed feed is not activated until the end ofthe block is reached, since an NC stop was not triggered.Corresponding to ... DB21, ... DBX24.6 (dry run feedrate selected)SD42100 $SC_DRY_RUN_FEED (dry run feedrate)Z1: NC/PLC interface signals19.12 Feeds (V1)Basic Functions1652 Function Manual, 01/2015, 6FC5397-0BP40-5BA2