Local device and process diagnostics in a process control...

G - Physics – 05 – B

Patent

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G05B 19/048 (2006.01) G05B 19/042 (2006.01) G05B 19/418 (2006.01)

Patent

CA 2267527

A field device for use in a process control network having a plurality of devices communicatively coupled by a two-wire, all-digital communication bus includes a connector that connects the field device to the two-wire, all-digital bus to enable all-digital communication over the bus, a memory that stores a diagnostic test routine having a series of device or process diagnostic test instructions, and a controller that performs the device or process diagnostic test instructions stored in the memory to implement a device or process diagnostic test using the field device. A data collection unit within the field device collects diagnostic data generated during the diagnostic test and a communication unit communicates the collected diagnostic data over the bus to a host device for processing. The controller may include a program language interpreter adapted to interpret the diagnostic test instructions which may be provided to the field device from another one of the devices via the bus.

Elément d'appareillage pour réseau à commande de processus, où une pluralité de dispositifs communiquent entre eux via un bus bifilaire entièrement numérique, comprenant un connecteur reliant l'élément d'appareillage à ce bus, afin d'assurer la transmission entièrement numérique via le bus. L'élément comprend aussi une mémoire de programme d'essai de diagnostic qui dispose d'une série d'instructions d'essai de diagnostic pour dispositif ou processus, et un régisseur qui applique les instructions ainsi mises en mémoire, afin de conduire un essai de diagnostic pour dispositif ou procédé. L'élément comprend enfin une unité de collecte des données, pour recueillir les données de diagnostic générées au cours d'un essai de diagnostic, et une unité de communication transmettant ces données, via le bus, en vue de leur traitement dans une unité centrale. Le régisseur peut comporter un interpréteur de langage de programme, conçu pour interpréter les instructions d'essai de diagnostic susceptibles d'être fournies à l'élément d'appareillage par tel ou tel autre dispositif, via le bus.

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