Multiplex data communication system
First Claim
1. A multiplex data communication system including a plurality of communication nodes interconnected by means of a transmission path, said communication nodes controlling electronic equipment units connected thereto, respectively, each one of said communication nodes comprising:
- a data transmitting/receiving circuit to receive data transmitted from at least another one of said communication nodes through said transmission path and to transmit data relating to said each communication node through said transmission path, said data transmitting/receiving circuit providing a reception signal representative of normal reception of said data from said at least another communication node and a transmission signal representative of normal transmission of said data relating to said each communication node; and
a data operating circuit to control an electronic equipment unit associated with said each communication node based on said data received from said at least another communication node and to generate said data relating to said each communication node which is transmitted by said data transmitting/receiving circuit, said data operation circuit making a decision of normality of a data communication function of said each communication node based on at least one of said reception signal and said transmission signal.
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Abstract
A multiplex data communication system including a number of communication nodes interconnected through a transmission path, each of which includes a data transmitting/receiving circuit providing a reception signal representative of normal data reception from another communication node and a transmission signal representative of normal data transmission therefrom, and a data operation circuit for controlling an electronic equipment unit associated with each communication node based on the data from the other communication node and generating the data relating to each communication node which is transmitted by the data transmitting/receiving circuit, the data operation circuit making a judgement of normality of a data communication function of each communication node based on at least one of the data reception signal and data transmission signal.
26 Citations
16 Claims
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1. A multiplex data communication system including a plurality of communication nodes interconnected by means of a transmission path, said communication nodes controlling electronic equipment units connected thereto, respectively, each one of said communication nodes comprising:
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a data transmitting/receiving circuit to receive data transmitted from at least another one of said communication nodes through said transmission path and to transmit data relating to said each communication node through said transmission path, said data transmitting/receiving circuit providing a reception signal representative of normal reception of said data from said at least another communication node and a transmission signal representative of normal transmission of said data relating to said each communication node; and a data operating circuit to control an electronic equipment unit associated with said each communication node based on said data received from said at least another communication node and to generate said data relating to said each communication node which is transmitted by said data transmitting/receiving circuit, said data operation circuit making a decision of normality of a data communication function of said each communication node based on at least one of said reception signal and said transmission signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A multiplex data communication system including a plurality of communication nodes interconnected by means of a transmission path so as to intercommunicate with one another through the transmission path, each said communication node comprising:
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data transmitting means for transmitting a proof data frame with which another communication node proves normality in data transmission function of said each communication node before transmission of a communication data frame of data attributive to each said communication node; and data receiving means for receiving said proof data frame and said communication data frame from another communication node, said data receiving means proving specific data contained in said proof data frame so as to observe normality in transmission function of said another communication node and assuming abnormality of said another communication node when said data in said specified area of said proof data frame is unacceptable. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification