FAT
FAT (Factory Acceptance Test) complete validation test for an equipment/a plant at the producer’s site.
FB
Function Block
FB-instance
FB-instance see also instance
FB-type
FB-type name of a function block with calling and return interface
Function
Function a POU of type "FUNCTION"
Function block
Function block a POU of type FUNCTION_BLOCK
Function block diagram (FBD)
Function block diagram (FBD) a programming language for the description of networks with simultaneously working Boolean, arithmetic and similar elements