P3: Basic PLC Program for SINUMERIK 840D sl
13.7 Interface structure
Function interface
The function interface is formed by FBs and FCs. The figure below illustrates the general structure of the
interface between the PLC and the NCK.
Figure 13-4
PLC/NCK user interface
Basic Functions
863
Function Manual, 09/2011, 6FC5397-0BP40-2BA0