Siemens SINUMERIK 840Di Function Manual page 1222

Detailed Description
2.6 Interface structure
When the tool management (magazine management) function is activated in the NCK, the
assignment of spindle or revolver and the loading/unloading points are entered in separate
interface DBs (DB71-73)
The triggering and parameter assignment of NCK functions is performed by means of PLC
function calls.
The following function calls are available, for example:
• Position a linear axis or rotary axis
• Position an indexing axis
• Start a prepared asynchronous subprogram (ASUB)
• Read/write NC variables
• Update magazine and tool movement
Some of the above functions are described in their own function documentation.
Fig. 2-7
2-28
PLC/NCK channel interface
PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0