SFC Language

The Sequential Function Chart (SFC) language is a graphic language used to describe operations of a sequential process. This language uses a simple graphic representation for the different steps of a process, and conditions that enable the change of active steps. An SFC program is entered by using the graphical SFC editor. The SFC Editor is launched automatically when an SFC program is opened or when an SFC program is edited.

SFC is the core of the IEC 61131-3 standard. The other languages usually describe the actions within the steps and the logical conditions for the transitions. The SFC editor allows the user to enter complete SFC programs. It combines graphic and text editing capabilities, thus allowing the entry of both the SFC chart, and the corresponding actions and conditions.