Sequential Function Chart (SFC) Programming Language

SFC is a graphically oriented language defined in the IEC 61131-3 standard.

It allows for clear chronological representation of a program’s sequence of actions.

How It Works:

• Actions are assigned to step elements
• The processing flow is guided by transition elements

Key SFC Features:

• Step – Represents a program state
• Action – Task to be executed during a step
• Entry/Exit Action – Performed when entering or exiting a step
• Transition – Defines conditions for moving between steps
• Active Step – The current executing step in the sequence