OATs - IEC 61131 - Function Block Diagram

Function Block Diagram (FBD) has many similarities with electronic circuits build from discrete ICs. It is a graphical form of placing and connecting functions and function blocks to construct the overall behaviour within a PLC. As the signal lines between outputs and inputs of function blocks may have any data type, Function Block Diagrams can be used easily to handle non-boolean data.

Function Block Diagram (FBD)

Function Block Diagrams can also be used in IEC 61131 -3 Sequential Function Charts to define actions and transitions.

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