Encapsulation/Reuse Mechanisms –Function Blocks, Functions, Data Types, Programs •Application-adapted Languages –Ladder Diagram (LD) for logic control (“power flow”) –Function Block Diagram (FBD) for regulatory control (“data flow”) –Sequential Function Chart (SFC) for state-machine control –Structured Text (ST) for information processing –Instruction List (IL) for assembly-level programming •A Mature, Internationally Adopted Standard –First edition: 1993 –Second edition: 2001.
