Multiplex communications – Fault recovery
Patent
1995-06-22
1997-03-18
Olms, Douglas W.
Multiplex communications
Fault recovery
371 681, 371 371, H04L 1226
Patent
active
056129467
ABSTRACT:
The same electrical device can be used in two modes, a simplex bus connection mode and a duplex bus connection mode, by collating signals output from two input and output ports for two electrical circuits in an electrical device with a comparator and detecting a fault in the electrical circuits in a duplex bus connection mode, and by checking whether a normal signal is output from an input and output port by collating a signal output from one input and output port for one of the two electrical circuits with the output signal fed back via another input and output port in a simplex bus connection mode.
REFERENCES:
patent: 5029071 (1991-07-01), Kinoshita
patent: 5086499 (1992-02-01), Mutone
patent: 5157663 (1992-10-01), Major et al.
patent: 5249187 (1993-09-01), Bruckert et al.
"A 32-bit Fail Safe MPU board" by Masayuki UMEYAMA, Japan Signal Technique Report, vol. 16, No. 3, pp. 11-16 (1992).
"Development of a 32-bit Fail Safe FPU" by Noboru ASANO, Traffice Electronics and Rail Way Research Committee Report of the Institute of Electrical Engineer of Japan TER-92-35, pp. 31-41 (1992).
Elektronik, vol. 35, No. 25, 12 Dec. 1986, Munchen, DE, Kuntz W., et al.: Integrierte Schaltungen mit Fail-Safe-Eigenschaften.
Kanekawa Nobuyasu
Ohtsuji Shinya
Sato Yoshimichi
Suzuki Shoji
Hitachi , Ltd.
Olms Douglas W.
Patel Ajit
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