Sequential Function Chart (SFC)

Sequential Function Chart is a graphical based language that resembles a flow chart diagram. The language is commonly used in complex machine control processes when there are many discrete states of operation. This allows efficient use of the processor since it is only required to scan the program associated with each active step.

The graphical symbols are Step, Transition, and Branch. Each can be defined by a single variable or as a full program written in a different language (LD, ST, IL). In many cases, SFC is used to control the execution of different Ladder and ST programs.

Refer to the XG5000 User Manual by LS Electric, Chapter 6 (page 304) for more information. You can find it here: LS PLC User Manuals.

 

 

 

 

LP001-3