Abstract: A data arrangement for an apparatus connectable to a communication network comprises data points (6.1..6.n) arranged in an apparatus and also a characterization of the apparatus. In a data point 6.k, with an index k of 1 to n, dynamic process information is storable. With apparatus connected, the data points (6.1..6.n) are accessible over the communication network for a station connected to the communication network for the reading and/or changing, in which also a single data point (6.k) is accessible. The characterization is a static description of objects of the apparatus in which a single data point (6.k) or also a group of data points (6.k) are objects of the apparatus. The data arrangement creates the precondition that in the operation of the apparatus an access is feasible to a data point (6.k) with a minimum of data traffic on the data network. The available characterization makes possible, further, a data-controlled realization of a user program.