Siemens SINUMERIK 840D sl Function Manual page 860

R2: Rotary axes
13.3 Programming rotary axes
Example:
C starting position is 0° (see figure below).
①
②
③
④
Figure 13-6
Block-search response
After a block search with calculation, the collected modulo-conversion search position can be
scanned via the
$AC_RETPOINT
system variable.
This system variable returns the position converted to modulo.
Supplementary conditions for ASUB after block search with calculation:
In this instance, as well as with the cross-channel block-search tool SERUPRO, the modulo
conversion simulated in the block search must be performed in the part program.
860
POS[C] = DC(100)
POS[C] = DC(300)
POS[C] = DC(240)
POS[C] = DC(60)
Examples of DC programming
C axis traverses to position 100° along the shortest path
C axis traverses to position 300° along the shortest path
C axis traverses to position 240° along the shortest path
C axis traverses to position 60° along the shortest path.
Since, in this case, the path is equal to 180° in both
directions, preference is given to the positive direction of
rotation.
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions