Synchronized electronic network including backup masters

H - Electricity – 04 – Q

Patent

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Details

H04Q 9/04 (2006.01) G07C 9/00 (2006.01) H04J 3/06 (2006.01)

Patent

CA 2226322

Operation of a plurality of electronic devices (56M) is synchronized. The plurality of devices includes a master unit (56M-1) and a plurality of other units (56M/S), and the master unit (56M-1) transmits a synchronizing signal (301) to at least one of the other units (56M) at predetermined intervals. Each of at least two of the other units (56M) detects whether a synchronizing signal is received at the respective unit (56M) within a predetermined period of time. If not, the respective unit changes from a slave mode of operation to a master mode of operation. Contention between the two or more potential back-up master units (56M) is resolved based on priority in a daisy-chain arrangement or by providing different time-out watch-dog periods for the potential back-up devices.

Le fonctionnement d'une pluralité de dispositifs électroniques (56M) est synchronisé. Cette pluralité de dispositifs comprend une unité pilote (56M-1) et une pluralité d'autres unités (56M/S); l'unité pilote (56M-1) transmet un signal de synchronisation (301) à au moins une des autres unités (56M) à des intervalles prédéterminés. Chacune d'au moins deux des autres unités (56M) détecte si un signal de synchronisation est reçu au niveau de l'unité respective (56M) à l'intérieur d'une période prédéterminée. Si ce n'est pas le cas, l'unité respective passe d'un mode de fonctionnement asservi à un mode de fonctionnement pilote. Le conflit d'utilisation entre les deux unités pilote d'assistance potentielles (56M) ou plus est résolu en fonction de la priorité au moyen d'une disposition en guirlande ou de la création de différentes périodes de surveillance de dépassement de temps pour les dispositifs d'assistance potentiels.

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