Hitachi, Ltd.

Isao Nakada

Hiroshi Arakawa

Susumu Nakayashiki

Kazuo Yagyu

Toyokazu Hashimoto

Masahiko Kida

Masao Shimada

Generating apparatus and method by which all steps of the procedure for generating a configuration diagram of connection between a plurality of units constituting a system can be automated. The automatic connection configuration diagram generating system comprises a first memory for storing data indicative of the units by which the system is constituted, a second memory for storing data indicative of a layout according to which the units of the system are laid, a knowledge base for incorporating a set of rules indicative of connection specifications for all of the units of the system, a selector for selecting connection specification rules for desired units from the rule set stored in the knowledge base, a controller for determining a connection structure on the basis of the selected rules and the data stored in the first and second memories, and a third memory for storing the connection structure determined by the controller.

Automatic generating system of connection configuration diagram among

In a loop transmission system utilizing specific patterns, a specified station for sending the specific patterns sends a specific pattern S or a specific frame S' which is not delayed in each station in advance of sending a specific pattern G used for data exchanging in each station, thereby ensuring rapid detection of abnormality of the specific pattern G.

Method and system of loop transmission

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Hadano, Japan

Isao Nakada