Using the engineering tool SIMATIC S7 CFC (Continuous Function Chart), automation applications can be created with SIMATIC S7, SIMATIC WinAC and D7 SYS by drawing a technology-oriented diagram (similar to the function diagram for PLC programming). With this "graphic programming”, the blocks can be arranged and interconnected on a kind of "drawing sheet". An off-the-shelf block library is available for this purpose.

However, users can also program their own blocks and add them to the library.

SIMATIC S7 CFC can be used with the SIMATIC S7-300 (recommended from CPU 316 or CPU 314C upwards), SIMATIC S7-400, SIMATIC WinAC and D7-SYS.