What is the Sequential Function Chart (SFC) PLC programming language?

Basically Sequential Function Chart (SFC) is another PLC programming language that uses graphical blocks for logic, but in SFC each block is called a step and your code will continue to execute the instructions within it until the transition condition is met. Allows logic to proceed to the next step. This concept is similar to a flow chart, hence the word chart in SFC. The decision to move to the next step of your SFC logic can be based on timing, a particular step in the process, or the physical state of the equipment. Unlike traditional flow charts, SFCs can have multiple paths (branches), and you can use branches to execute multiple steps at once. Some advantages of Sequential Function Charts are useful for large processes you can break down into major steps, easy online debugging, you can see exactly at which point your logic stopped, much faster to design your process. And some of the disadvantages of sequential task charts are that they don't fit every application.