Universal operator station module for a distributed process...

G - Physics – 05 – B

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G05B 19/042 (2006.01) G05B 23/02 (2006.01)

Patent

CA 2264683

A module (56) of a distributed process control system has a prior art kernel submodule (16'), a peripheral submodule (59), and an interface circuit (58) to provide for communications between the two submodules. The kernel submodule communicates with the interface circuit over a module BUS (18') which includes a data BUS and an address BUS. The peripheral submodule communicates with the interface circuit over a peripheral component interface (PCI) BUS (60), a single thirty two bit BUS which is incompatible with the module BUS. The interface circuit permits such communications between the two submodules without requiring any hardware or software changes to the kernel submodule and the module BUS, nor to components of the peripheral submodule or its PCI BUS. The interface circuit includes interface registers, a control circuit which determines which submodule is permitted to write or read data and/or address into or from a given register of the interface registers. Input circuits controlled by control signals produced by the control circuit determines the source of the data and/or addresses written into a given register. An output circuit under the control of the control circuit determines the BUS over which the contents of a given register are transmitted to the addressed submodule.

Le module (56) d'un système de commande de processus réparti comporte un sous-module noyau (16) d'une technique antérieure, un sous-module périphérique (59) et un circuit interface (58) servant à faire communiquer les deux sous-modules. Le sous-module noyau communique avec le circuit interface par le bus (18) du module qui comprend un bus de données et un bus d'adresses. Le sous-module périphérique communique avec le circuit interface par un bus (60) interface de composants périphériques (PCI), bus simple à trente deux bits incompatible avec le bus du module. Le circuit interface permet de faire communiquer les deux sous-modules sans devoir modifier le matériel ou les logiciels du sous-module noyau, ni le bus du module, ni les composants du sous-module périphérique, ni ses bus PCI. Le circuit interface comporte des registres d'interface, un circuit de commande qui détermine quel sous-module est autorisé à écrire ou lire les données et/ou adresses inscrites dans un registre donné des registres de l'interface. Des circuits d'entrée commandés par les signaux de commande produits par l'unité de commande déterminent la source des données et/ou adresses inscrites dans un registre donné. Un circuit de sortie commandé par le circuit de commande détermine le bus servant à transmettre le contenu d'un registre donné au sous-module adressé.

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