| 摘要 |
A transmission system having slave stations for processing data received from the master station and generating system common data, a particular slave station is provided to backup the master station when it fails. The system common data is sent to the master station and also the particular slave station. The particular slave station not only automatically detects the failure of the master station but also executes the polling of the other slave stations in place of the master station on the basis of the system common data stored in the particular slave station.
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