Sequential Function Chart (SFC) Editor

The SFC Editor is a graphic tool used to enter and manage sequential function charts according to the IEC 61131-3 standard.

  • The editor supports graphic features (e.g., drag-and-drop) to rapidly arrange the elements of the diagram. (Figure 1)
  • It supports automatic chart formatting when inserting or deleting items using quick inputs with the keyboard.

Figure 1: Example: SFC chart


  • For each step, the cells referring to P1, N, and P0 actions are colored when they are defined.


    • Select a step, transition, or jump and press Ctrl+ENTER to change its number.
    • Press the Spacebar on the main corner (on the left) of a ulergence or convergence, to set either double or single horizontal line style.

See Sequential Function Chart (SFC).