A method and an engineering system for generating and handling component applications (CA1 . . . CAn) for physical components (C1 . . . Cn) such as a programmable control (Programmable Logic Control (PLC)), Human Machine Interface (HMI) and/or a Supervisory Control and Data Acquisition Unit (SCADA) of a control system (CA), in which instances (ICF1 . . . ICFn) of component functions (CF1 . . . CFn) for the components (C1 . . . Cn) are produced and from which the component applications (CA1 . . . CAn) are generated, the generated component applications (CA1 . . . CAn) being loaded to the physical components (C1 . . . Cn).