Process control with data bus protocol

Details Process control with data bus protocol Process control with data bus protocol

G - Physics

05

B

G05B 11/01 (2006.01) G05B 15/02 (2006.01) G05B 19/042 (2006.01) G05B 19/418 (2006.01) G08C 19/00 (2006.01)

Patent

CA 2238494

The present invention includes a process control instrument (100) having an improved data bus protocol for facilitating communications between master and slave nodes. The process control instrument (100) includes a microprocessor (200) operating in accordance with the SPI data bus protocol, first and second peripheral devices (204, 206), and a data bus (220) coupled to the microprocessor and the first and second peripheral devices. The improved data bus protocol used in the process control instruments of the present invention provides numerous advantages such as reduced printed circuit board space requirements and greater interchangeability of peripheral and master node components.

La présente invention porte sur un instrument (100) de commande de processus possédant un protocole amélioré de bus de données de façon à faciliter les communications entre des noeuds maîtres et asservis. L'instrument (100) de commande de processus comprend un microprocesseur (200) fonctionnant conformément au protocole de bus de données d'une interface périphérique série (SPI), des premier et second dispositifs périphériques (204, 206) et un bus de données (220) couplé au microprocesseur et aux premier et second dispositifs périphériques. Le protocole amélioré de bus de données utilisé dans les instruments de commande de processus de cette invention offrent de nombreux avantages tels que des besoins en espace réduits pour la carte de circuit imprimé et une plus grande interchangeabilité des composants des noeuds périphériques et maîtres.

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