Siemens SINUMERIK 840D Function Manual

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NoteModulo partition axesBy aligning the two following machine data, indexing positions of 360° modulo indexing axescan be implemented in the same way as for the 360° modulo range:● MD30503 $MA_INDEX_AX_OFFSET● MD30340 $MA_MODULO_RANGE_STARTSee the examples in Chapter "Indexing axes, "Example 3: Rotary modulo axis as equidistantindexing axis (Page 254)" and the following chapters.360° modulo rotary axis: Positioning behavior for G90 (modal absolute programming)The standard behavior for G90 is set via the machine data:MD30455 $MA_MISC_FUNCTION_MASK, bit 2 = Meaning0 The 360° modulo rotary axis positions corresponding to AC as standard for G90 program‐ming:● Target position > Current position: Move in positive traversing direction● Target position < Current position: Move in negative traversing direction1 For G90 programming, the 360° modulo rotary axis positions as standard correspondingto DC, i.e. the shortest path.Position display in the 360° modulo representationActivating the position display at the user interface in the 360° modulo representation is realizedusing the axis-specific machine data:MD30320 $MA_DISPLAY_IS_MODULO = 1NC/PLC interface signalsActivating the traversing range limitsIn principle, the traversing range of a 360° modulo rotary axis is infinity. This is the reason thataxis-specific traversing range limits to not apply as standard, such as software limit switchesand working error limits. The traversing range limits of a 360° modulo rotary axis can beactivated using the subsequent absolute axis-specific NC/PLC interface signal, possiblyinitiated via an M/H function in the NC program:DB31, ... DBX12.4 = 1 (360° modulo rotary axes: Activate traversing range limits)R2: Rotary axes7.2 Modulo 360 degreesAxes and spindlesFunction Manual, 06/2019, A5E47437747B AA 225