: PROGRAM PLC_PRG VAR inst : POU; END_VAR FUNCTION POU VAR END_VAR

: PROGRAM PLC_PRG VAR inst : FB; END_VAR [...] IMPLEMENTS XY VAR END_VAR

_PRG VAR inst : FB; END_VAR FUNCTIONBLOCK FB VAR END_VAR

: PROGRAM PLC_PRG VAR inst : ITF; END_VAR INTERFACE ITF VAR

_PRG VAR inst : FB; END_VAR [...] _BLOCK FB VAR_OUTPUT re : REFERENCE TO INT; END_VAR

_PRG VAR inst : FB; END_VAR [...] EXTENDS POU VAR END_VAR FUNCTION POU VAR END_VAR

: PROGRAM PLC_PRG VAR inst : FB; END_VAR [...] EXTENDS FB VAR END_VAR

: PROGRAM PLC_PRG VAR inst : FB; END_VAR [...] 1 VAR_INPUT END_VAR

inst : FB; END_VAR [...] be declared within a VAR_INPUT-, VAR_OUTPUT or VAR

: PROGRAM PLC_PRG VAR inst : DUT; END_VAR