Patent ID: 8214881

Claim:
An automation system, comprising: a programmable logic controller having an integrated web server; a user interface that presents data provided by the web server, wherein the data are requested by the user interface from the programmable logic controller, and wherein the programmable logic controller transmits the data to the user interface; and a security device for an authentication, wherein the programmable logic controller identifies a change of a respective programmable controller project that requires changes in corresponding instructions for the presentation of the data, wherein the programmable logic controller stores a log file for all events of access by a respective user identified with the security key and reporting it to the administrator server, wherein the security device stores instructions for a presentation of the data received from the programmable logic controller at the user interface, wherein the instructions comprise a web page template and an applet for filling in the web page template with the data, wherein the applet is downloaded from the security device and executed by the user interface.