1. A method of diagnosing an automation system comprising a plurality of automation components having physical or functional relationship, the method comprising: creating a diagnostic model having a plurality of nodes, wherein a first component and a second component of the plurality of automation components are assigned to a first and a second of the model nodes respectively; creating a link between the first and second model nodes within the diagnostic model for modeling the physical or functional relationship between the first and second automation components wherein the diagnostic model comprises a hierarchical tree topology of the automation system; acquiring within the diagnostic model a first status of the first automation component by a first status information regarding the first model node; acquiring within the first node of the diagnostic model via the link a second status of the second automation component by a second status information regarding the second model node; evaluating both the first and second status information in the first node of the diagnostic model for determining a status information about the automation system, wherein the diagnostic model is created automatically by an engineering system during a process of project planning of the automation system executed by the engineering system; and detecting a faulty automation component from the plurality of automation components within the automation system by using the diagnostic model, wherein topological links define a hierarchical relationship among the nodes, and a fault indication is advanced in the hierarchical tree topology from a lower level node to a higher level node to present a fault from a lower level node in a top level status information; wherein the diagnostic model is loaded into the first and/or the second automation component, and activated at run time of the automation system.