Abbreviated as FBA a function block
adapter provides the interfaces to ports, to function
blocks, and a description of the mapping between these
interfaces. The function block
adapter also provides the connection of UML capsules and
function blocks (FBs) of the IEC 61131-3 (the
standard for PLC programming languages).
Function Block Programming (PDF) Function Block Diagrams (FBDs) are another part of the IEC 61131-3 standard. The primary concept behind a FBD is data flow.
Function Blocks In engineering disciplines, especially within time driven systems, software languages are often based on function blocks. By Torsten Heverhagen, Robert Hirschfeld, Rudolf Tracht.