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Programmable logic controller programming: Block diagram

Programmable logic controller programming: Block diagram

From the course: Learning Industrial Automation

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Programmable logic controller programming: Block diagram

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- [Instructor] Function Block Diagram, FBD. Function Block Diagram is a graphical programming language used for PLC programming base on functions and function block composition. It shows a graphic representation of executable code. It consists of a series of blocks representing instructions connected by lines, cold wires. A function block is represented as a rectangular block with inputs entering from the left and outputs emerging from the right. The function of block type name is shown in the box where the block function name is written as well. Examples: and function block, or function block, xor function block. Notice the name and the different inputs and outputs for each block. This is an example of a ladder diagram program, and the equivalent functional block diagram. You can see that is shows the same process but only using block instead. Here's an example of multiple blocks used to represent a logic within the…

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