S7-CFC offers graphical interconnection and parameterization of off-the-shelf or user-defined function blocks to solve sophisticated continuous control applications. An extended implementation of IEC 61131-3 function block diagram, S7-CFC uses higher-level function blocks within the same editor. By design, S7-CFC provides automatic management of S7 resources, and offers a low learning curve for users not accustomed to PLC programming.