Patent ID: 11868120
Assignee: ENDRESS+HAUSER PROCESS SOLUTIONS AG
Field: Control (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for reducing volume of data to be transmitted from a field device, wherein the field device registers values of a process variable, wherein the field device is connected for communication with a network participant via a communication network, and wherein the field device is embodied to transmit registered values of the process variable to the network participant, the method comprising:
checking a current value of the process variable at determined points in time that have a constant time difference from neighboring points in time;
comparing a value of the process variable at a first point in time, which corresponds to the point in time of the checking, with a value of the process variable at a second point in time, wherein the second point in time is the point in time preceding the first point in time; and
transmitting the value of the process variable at the first point in time when a magnitude of the difference between the value of the process variable at the first point in time and the value of the process variable at the second point in time is greater than or equal to a predetermined first magnitude,
wherein the value of the process variable at the first point in time is transmitted only when the magnitude of the difference between the value of the process variable at the first point in time and the value of the process variable at the second point in time differs at least by a predetermined factor from a magnitude of a difference between the value of the process variable at the second point in time and a value of the process variable at a third point in time, wherein the third point in time is the point in time preceding the second point in time.