SFCs are one of the five PLC programming languages defined by the IEC 61131-3 standard, along with ladder logic, function block diagram, structured text, and instruction list.

If you want to program a PLC (programmable logic controller) using sequential function charts (SFC), you need to understand the basic elements and steps of this graphical language.

Sequential Function Chart (SFC) is one of the PLC programming languages defined in the IEC-61131 standard. SFC has been increasingly used in practical applications because even small controllers can ...