| 摘要 |
PURPOSE:To follow the variation of a network constitution precisely under simple algorithm by starting a network reconstituting means every fixed number of times of reception of a communication right transfer instruction. CONSTITUTION:A lower node address is set up in a self-node setting address and a token is transmitted by using a lower node address subtracted by '1' as a destination address. If the token is not normally transmitted to the lower node, the self-node decides that the lower node is a communication disabled node, checks whether the lower node address value is the minimum address value fixed on the network or not, and if the value is the minimum address value, tries to transmit the token by using a new lower node address value again subtracted by '1' as the destination address. Thus, the transmission of the token to the node of the address value obtained by successively subtracting '1' from the preceding address is tried and the operation is repeated until the token is received by any one of nodes. Consequently, transmission control devices can be precisely combined under simple algorithm.
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