Siemens SINUMERIK 840D sl Function Manual

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19.15 Indexing Axes (T1)19.15.1 Signals from axis/spindle (DB31, ...)DB31, ...DBX76.6 Indexing axis in positionEdge evaluation: No Signal(s) updated: CyclicSignal state 1 or edgechange 0 → 1The signal is influenced according to the "Exact stop fine":When "Exact stop fine" is achieved, the signal is set.When exiting "Exact stop fine", the signal is reset.● The indexing axis is located on an indexing position.The indexing axis has been positioned with instructions for "Coded Position".Note:If the "Exact stop fine" window is reached and the indexing axis is positioned on an indexing position,the signal is enabled regardless of how the indexing position was reached.Signal state 0 or edgechange 1 → 0● The axis is not defined as an indexing axis.● The indexing axis is traversing:DB31, ... DBX64.7/64.6 (Travel command+/-) is active.● The indexing axis is located at a position which is not an indexing position.Examples:– In JOG mode after abortion of travel movement, e.g. with RESET– in Automatic mode: indexing axis has, for example, approached a selected position controlledby an AC or DC instruction● The indexing axis has not been positioned with instructions for coded positions (CAC, CACP, CACN,CDC, CIC) in automatic mode.● The "Servo enable" signal for the indexing axis has been canceled:DB31, ... DBX2.1 (Servo enable)Signal irrelevant for ... ... Axes that are not defined as indexing axes:MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB = 0Application exam‐ple(s)Tool magazine: Activation of a gripper for removing a tool from a magazine is triggered when theindexing axis is in position:DB31, ... DBX76.6 (indexing axis in position) = 1.This must ensured by the PLC user program.Special cases, er‐rors, ...Notes:The axis positions entered in the indexing position table for the individual divisions can be changedthrough zero offsets (including DRF).The interface signal:DB31, ... DBX76.6 (indexing axis in position)is then set to 1 when the actual position of the indexing axis matches the value entered in the indextable plus the offset.If a DRF is applied to an indexing axis in AUTOMATIC mode, then interface signal "Indexing axis inposition" remains active even though the axis is no longer at an indexing position.Corresponding to .... MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB (axis is an indexing axis)Z2: NC/PLC interface signals19.15 Indexing Axes (T1)Extended FunctionsFunction Manual, 10/2015, 6FC5397-1BP40-5BA3 943