| 摘要 |
A communication system includes a plurality of repeating devices connected with each other through a data transmitting path. One or more node terminals are connected to each repeating device. In a communication frame of communication data to be sent, an address description area is provided to describe either one of a terminal address of the node terminal related to the communication data and a device address of the repeating device also related to the communication data. In case of data communication between one node terminal and the other node terminal, the respective addresses of the node terminals are described in the address description area to designate a sender and a destination. Owing to the provision of the address description area, it is possible to certainly transmit the communication data from the sender to the nominated destination without reducing data volume transmitted per unit time.
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