Which language uses blocks and lines to show interconnections showing data flow rather than physical wiring?

Which language uses blocks and lines to show interconnections showing data flow rather than physical wiring?

• A. Function Block Diagram
• B. Ladder Diagram
• C. Instruction List
• D. Structured Text

Answer: (A)

Understanding how graphical languages depict data flow versus physical wiring. Function Block Diagram represents programs as blocks that perform operations, with lines linking outputs to inputs to show how data moves between blocks. This setup emphasizes the flow of information through the system rather than how wires are laid out physically. The blocks can be reused and arranged to illustrate modular control logic, making the data dependencies clear and easy to follow. Ladder Diagram, by contrast, mirrors a relay-based electrical schematic, using vertical rails and horizontal rungs with contacts and coils. Its appearance and structure resemble physical wiring and hardware wiring practices, so it’s less about data movement and more about mimicking control circuits. Instruction List and Structured Text are textual languages—they convey logic through written instructions rather than graphical interconnections—so they don’t fit the description of blocks connected by lines showing data flow.

Understanding how graphical languages depict data flow versus physical wiring.

Function Block Diagram represents programs as blocks that perform operations, with lines linking outputs to inputs to show how data moves between blocks. This setup emphasizes the flow of information through the system rather than how wires are laid out physically. The blocks can be reused and arranged to illustrate modular control logic, making the data dependencies clear and easy to follow.

Ladder Diagram, by contrast, mirrors a relay-based electrical schematic, using vertical rails and horizontal rungs with contacts and coils. Its appearance and structure resemble physical wiring and hardware wiring practices, so it’s less about data movement and more about mimicking control circuits. Instruction List and Structured Text are textual languages—they convey logic through written instructions rather than graphical interconnections—so they don’t fit the description of blocks connected by lines showing data flow.