Patent ID: 7447803

Claim:
A method for reducing a process data set to be transferred from a field device for registering and/or influencing process variables to a process control center, via a databus in the process automation, the process data including information concerning the operating condition of the field device, and/or information concerning process variables registered with the field device, and/or identification data of the field device, comprising the steps of evaluating and storing the process data occurring during an interval between two transfers of data, wherein the process data are reduced by means of the evaluation; transferring the reduced process data to a process control center; and dividing the process data in the evaluation into static and dynamic data, wherein: process data which have changed since the last executed evaluation are classified as dynamic data, each static data are transferred as binary state values, transfer of the reduced process data is executed only at the occurrence of specified conditions, for the dynamic data, coded ranges are specified, and only the code of the affected range, in which a process parameter is contained, is transferred to the process control center.