and is used to reference [...] . Expression : IEC [...] Expresssion : IEC expression

. LIT: An IEC literal [...] valid IEC identifier [...] ) ID (IEC identifier

as IEC ( CODESYS ) [...] The same holds for references [...] types of references

instance , Reference [...] or Reference module ) [...] valid IEC identifier

. The instance path may refer [...] . REFERENCE : Slot [...] valid IEC identifier

valid slot reference [...] IEC identifiers

and refer to the elements [...] valid IEC identifier