There is described an automation network, a remote access server for an automation network and a method for transmission of operating data between an automation system with one or more automation devices and a remote computer with the operating data of the automation device being transmitted via the Internet or an intranet and displayed and/or changed on the remote computer by an Internet browser. The remote access server provides the operating data for the remote computer and, for a session-oriented access, creates a software object as an image of the automation device and, if changes are to be made to the operating data by the access, a software object for simulation of the automation device and/or of the process to be controlled by the automaton device, so that any changes can be checked for permissibility and/or validity before being forwarded to the automation device.