Hitachi, Ltd.

Tohru Horimoto

Hideaki Gemma

Kimitoshi Yamada

Yusuke Hino

Toshiharu Iwata

A composite loop communication network formed by combining a plurality of loop communication paths each provided with terminals with one another through a plurality of loop coupling devices so as to form a loop, is disclosed in which one of the terminals of each loop communication path is used as a management terminal, the management terminal of a loop communication path sets routing information on the communication between the loop communication path and a loop communication path adjacent thereto in a loop coupling device, and the loop coupling device selectively takes in data flowing through the former loop communication path, on the basis of the above routing information, to send the data from the loop coupling device to the latter loop communication path, thereby making possible the communication between terminals of different loop communication paths.

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Hadano, Japan

Tohru Horimoto