1. An automation system comprising: at least one bus system; hardware components connected to said at least one bus system; a system connection unit provided for at least one of said hardware components, said system connection unit comprising: a common interface containing a pre-defined identification for each of said hardware components for communication with an external communication partner, and for receiving and transmitting information; and at least one function object based on a software object as an image of a real functionality of said one hardware component, whereby said at least one function object is provided for accessing the real functionality of said one hardware component via said bus system.