"Scope and object This International Standard defines the GRAFCET1) specification language for the functional description of the behaviour of the sequential part of a control system. This standard specifies the symbols and the rules for the graphical representation of this language@ as well as for its interpretation. This standard has been prepared for automated production systems of industrial applications. However no particular area of application is excluded. Methods of development of a specification that makes use of GRAFCET are beyond the scope of this standard. One method is for example the ""SFC language"" specified in IEC 61131-3@ which defines a set of programming languages for programmable controllers. NOTE See annex C for further information on the relations between IEC 60848 and implementation languages such as the SFC of IEC 61131-3. 1) GRAFCET @ GRAphe Fonctionnel de Commande Etape Transition."