Function Block Diagram vs Ladder Logic

Developers should learn FBD when working on industrial automation projects, such as factory automation, building management systems, or process control in sectors like oil and gas, where PLCs are standard meets developers should learn ladder logic when working in industrial automation, manufacturing, or control systems engineering, as it is the standard language for programming plcs. Here's our take.

Function Block Diagram

Nice Pick

Developers should learn FBD when working on industrial automation projects, such as factory automation, building management systems, or process control in sectors like oil and gas, where PLCs are standard

Pros

• It is essential because it provides an intuitive, standardized way to implement control logic that aligns with IEC 61131-3 standards, making it easier for engineers to collaborate and maintain systems over time
• Related to: programmable-logic-controller, ladder-logic

Cons

• Specific tradeoffs depend on your use case

Ladder Logic

Developers should learn Ladder Logic when working in industrial automation, manufacturing, or control systems engineering, as it is the standard language for programming PLCs

Pros

• It is essential for creating logic to control machinery, sensors, and actuators in real-time applications, such as assembly lines, HVAC systems, or water treatment plants, due to its simplicity and direct mapping to electrical circuits
• Related to: programmable-logic-controller, industrial-automation

Cons

• Specific tradeoffs depend on your use case

The Verdict

These tools serve different purposes. Function Block Diagram is a concept while Ladder Logic is a language. We picked Function Block Diagram based on overall popularity, but your choice depends on what you're building.

The Bottom Line

Function Block Diagram wins

Based on overall popularity. Function Block Diagram is more widely used, but Ladder Logic excels in its own space.