Method and device for logging process variables of a digital field device

Abstract

A method and an electronic device are provided for logging process variables of a bus-controlled automation system in which process variables which are relevant to evaluation are buffered in at least one digital field device and are subsequently read, for the purpose of evaluation, by a central computer unit which is connected to the field device via a data bus. Process variable values which are relevant to evaluation are buffered in the field device in the form of a message, a plurality of equidistantly successive process variable values are recorded as messages, where the first process variable value is assigned a time stamp recorded for each message, and further process variable values are stored in further identical messages.

Dependencies are inferred from the claim text.