Field device and method for integrating a field device

A method for integrating a field device into an automation system, comprising:

• configuring an application interface of a system controller of the automation system for communication with a data interface for the field device, the application interface being configured to send a request message (REQ message) in data packets, and to receive a response message (RES message) via a TCP connection, and during the configuring the data packets comprise an address field for the data interface of the field device specifying a first address referring to a server outside the automation system, the configuring comprising testing the communication with a data interface of an external service that is functionally identical to the data interface for the field device;
• and
• integrating the field device into the automation system by changing the address field in the data packets to a second address referring to the data interface of the field device within the automation system, wherein, by changing a network parameter of a client of the system controller, the first address is changed to the second address.