A method of installing a mobile program code for the control of an industrial automation system with a central computer and a plurality of actors and sensors coupled via a bus system with said central installation computer, has the steps of transmitting the mobile program code from a remote location to the central computer of the industrial automation system, installing and commissioning the mobile program code independently on the industrial automation system, and generating by means of the mobile program code further mobile program codes having a defined task, and transmitting the further mobile program codes at least to said actors and sensors within the industrial automation system.