There is described an automation network, an access service proxy for an automation network and a method for transmitting operating data between a programmable controller and a remote computer, wherein the operating data of the programmable controller can be transmitted via the Internet or an intranet by means of the HTTP protocol and displayed and/or modified on the remote computer by an Internet browser. The access service proxy here contains a server for supplying the web pages containing the operating data of the programmable controller to the Internet browser of the remote computer, an interface, to which an engineering system can be connected so that operating data of the programmable controller can be transmitted using a communication mechanism for automation-engineering field communication via the connection between access service proxy and engineering system, and a synchronization unit for updating the content of the web pages if the operating data is modified by the engineering system. This provides uniform access to the operating data of the programmable controller and consequently data consistency and security against unauthorized access.