Function block diagram
In this article, we will take a closer look at Function block diagram, a topic that has captured the attention of many people in recent years. From its impact on society to its implications on daily life, Function block diagram has been the focus of numerous debates and discussions. Throughout this article, we will examine different perspectives and opinions on Function block diagram, as well as its possible implications for the future. Through detailed and comprehensive analysis, we hope to provide a comprehensive view of Function block diagram and its relevance in the contemporary world.
The function block diagram (FBD) is a graphical language for programmable logic controller design,[1] that can describe the function between input variables and output variables. A function is described as a set of elementary blocks. Input and output variables are connected to blocks by connection lines.
Design
Inputs and outputs of the blocks are wired together with connection lines or links. Single lines may be used to connect two logical points of the diagram:
- An input variable and an input of a block
- An output of a block and an input of another block
- An output of a block and an output variable
The connection is oriented, meaning that the line carries associated data from the left end to the right end. The left and right ends of the connection line must be of the same type.
Multiple right connection, also called divergence, can be used to broadcast information from its left end to each of its right ends. All ends of the connection must be of the same type.
Language
Function Block Diagram is one of five languages for logic or control configuration[2] supported by standard IEC 61131-3 for a control system such as a programmable logic controller (PLC) or a Distributed Control System (DCS). The other supported languages are ladder logic, sequential function chart, structured text, and instruction list.
References
