What does the PLC programming language FBD stand for?

What does the PLC programming language FBD stand for?

• A. Function Block Diagram
• B. Field Bus Diagram
• C. Functional Binary Diagram
• D. Flow Block Diagram

Answer: (A)

Function Block Diagram is a graphical PLC programming language that represents control logic as blocks (function blocks) with inputs and outputs connected by lines to show data flow. This visual approach makes it easy to reuse modular logic—like timers, counters, comparators, and logic blocks—by wiring them together to build the desired control sequence. It’s part of the IEC 61131-3 standard for PLC programming, alongside other languages like Ladder Diagram and Structured Text. The other terms aren’t standard PLC programming languages: Field Bus Diagram usually refers to network or fieldbus layouts rather than the programming style; Functional Binary Diagram isn’t a recognized PLC language; Flow Block Diagram isn’t used as an official PLC programming language.

Function Block Diagram is a graphical PLC programming language that represents control logic as blocks (function blocks) with inputs and outputs connected by lines to show data flow. This visual approach makes it easy to reuse modular logic—like timers, counters, comparators, and logic blocks—by wiring them together to build the desired control sequence. It’s part of the IEC 61131-3 standard for PLC programming, alongside other languages like Ladder Diagram and Structured Text.

The other terms aren’t standard PLC programming languages: Field Bus Diagram usually refers to network or fieldbus layouts rather than the programming style; Functional Binary Diagram isn’t a recognized PLC language; Flow Block Diagram isn’t used as an official PLC programming language.