The IEC 61131-3 languages Function Block Diagram (FBD) and the corresponding ST (Structure ... A Programmable Controller (PLC) is an industrial computer control system that continuously monitors the ...

IEC 61131 was previously known as IEC 1131. See PLC. Graphical ladder logic function block diagram sequential function chart Textual structured text instruction list The following example of ...

This allows users to index an array of basic type and User Defined Type using a variable in Structure Text, Function Block Diagram, and Ladder Diagram environment. Variable Indexed Arrays provides an ...