| 摘要 |
PROBLEM TO BE SOLVED: To start an ordinary communication operation by surely executing startup processing while effectively suppressing the generation of branches by making the number of startup nodes to a necessary minimum. SOLUTION: At least one of non-startup nodes not subscribing to a startup process is set as a synchronous backup node 100. When the synchronous backup node 100 detects that synchronous frames transmitted from the startup nodes are deficient due to the occurrence of a failure or the like in one of the startup nodes subscribing to the startup process, the synchronous backup node 100 subscribes to the startup process and transmits a pseudo synchronous frame simulating the synchronous frame to a communication bus 10. COPYRIGHT: (C)2008,JPO&INPIT
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