A field device and method for starting up an industrial automation network, wherein to allow virtual start-up of at least one field device, an field device integration package is provided, whose user interface plug-in has an extension that allows a software tool to access a simulation model for the behavior of the at least one field device, and upon virtual start-up, the simulation model is used to reproduce the response of the field device, where a process model or interfacing of an external process model via a co-simulation coupling can also be used to stimulate the reproduced field device behavior, and where because the models with the FDI package are provided by the field device manufacturer, correct simulation and hence minimization of the risks upon start-up of industrial installations can be expected.