G - Physics – 01 – D
Patent
G - Physics
01
D
G01D 21/00 (2006.01) G04F 10/00 (2006.01)
Patent
CA 2521119
The invention relates to a method for determining a measuring point in time (t M), at which a measured value is to be produced by a field device (1) of process automation technology, wherein the field device (1) communicates its measured values at certain communication points in time (t K) over a field bus following a query from a central control unit with regard to the measured values of the field device. The invention provides that the following communication point in time (t f) is approximated from at least two communication points in time (t K, t' K) and that the measuring point in time (t M) is determined on the basis of the approximated communication point in time (t f). Additionally, the invention relates to a corresponding apparatus.
L'invention concerne un procédé de détermination d'un moment de mesure (tM) auquel une valeur de mesure est produite par un appareil de terrain (1) utilisé dans la technique d'automatisation des processus. Ledit appareil de terrain (1) communique ces valeurs de mesure à des moments de communication (tK) définis, par l'intermédiaire d'un bus de terrain (5), après demande de ces valeurs de mesure par une unité de commande centrale (10). Selon l'invention, à partir d'au moins deux moments de communication (tK, t'K), le moment de communication (tf) suivant est déterminé par approximation, et le moment de mesure (tM) est déterminé sur la base du moment de communication (tf) déterminé approximativement. L'invention concerne en outre un dispositif correspondant.
Endress+hauser Gmbh+co. Kg
Smart & Biggar
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