| 摘要 |
Disclosed is a cyclic data transmission method for updating a common cyclic memory in a decentralized control transmission method which executes both a synchronous transmission of cyclic data and an asynchronous transmission of events characterized in that high speed cyclic data and low speed cyclic data are integrated into a frame when a token is acquired, and the frame is always transmitted with a fixed frame length resulting in an amount of synchronous data always being made constant and enabling the token round target time to be set equal to a update time of a cyclic data. Furthermore, the method according to the present invention enables the device is made at low cost, improves throughput in event transmission and a good response characteristic is provided.
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