Data processing: generic control systems or specific application – Generic control system – apparatus or process – Plural processors
Patent
1997-05-09
2000-05-09
Grant, William
Data processing: generic control systems or specific application
Generic control system, apparatus or process
Plural processors
700 82, G05B 1500
Patent
active
060616008
ABSTRACT:
A multi-tier, master-slave control network having redundant backup for a master node in which the slave nodes are provided with means for detecting a failure of the master node and for taking over for the master node in such circumstances. The master node and slave nodes are connected to a common bus. Each of the slave nodes has an uplink transceiver and a downlink transceiver, with the downlink transceiver ordinarily isolated by switches from the common bus. Each of the slave nodes has a timer programmed with a separate failure mode detection time period. When a slave mode fails to receive control messages from the master node for a period exceeding its programmed failure mode detection time period, the slave node takes over for the master node. Because each slave node has a separate failure mode detection time period, a priority is established in which the slave nodes will take over for the master node, and redundant master backup control is provided. A preferred embodiment of the control network has multiple buses, one bus for each tier, and each bus has a master node and a plurality of slave nodes, with each of the slave nodes capable of taking over for the master node on the slave node's particular bus.
REFERENCES:
patent: Re31852 (1985-03-01), Soderblom
patent: 3890471 (1975-06-01), Hachenburg
patent: 4251858 (1981-02-01), Cambigue et al.
patent: 4610013 (1986-09-01), Long et al.
patent: 4634110 (1987-01-01), Julich et al.
patent: 4814984 (1989-03-01), Thompson
patent: 5117430 (1992-05-01), Berglund
patent: 5423024 (1995-06-01), Cheung
patent: 5455959 (1995-10-01), Simmering
patent: 5461608 (1995-10-01), Yoshiyama
patent: 5751220 (1998-05-01), Ghaffari
patent: 5802043 (1998-09-01), Skillen et al.
patent: 5809220 (1998-09-01), Morrison et al.
Garland Steven R.
Grant William
I/O Control Corporation
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