Siemens SINUMERIK 840D Function Manual page 244

T1: Indexing axes
8.3 Commissioning
MD10940 $MN_INDEX_AX_MODE, bit 0 = <value>
Bit
0
244
<Value> Meaning
0 When traversing in the direction of ascending indexing positions, the displayed current
indexing position changes in the system variable $AA_ACT_INDEX_AX_POS_NO
upon reaching/overtraveling the "Exact stop fine" window (MD36010
$MA_STOP_LIMIT_FINE) of the next indexing position.
When traversing in the direction of descending indexing positions, the indexing posi‐
tion display changes as soon as you exit the "Exact stop fine" window.
Linear axis
Modulo rotary axis
①
The traversing range of the indexing axis with indexing positions and "Exact
stop fine" window
②
Indexing position indicated in the system variable $AA_ACT_IN‐
DEX_AX_POS_NO
1 The actual indexing position indicated in system variable $AA_ACT_IN‐
DEX_AX_POS_NO changes when reaching/passing half the traversing distance to
the next indexing position in the traversing direction.
Linear axis
Modulo rotary axis
①
Traversing range of the indexing axis with indexing positions
②
Indexing position indicated in the system variable $AA_ACT_IN‐
DEX_AX_POS_NO
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA