| 摘要 |
A data transfer system is provided for preventing a slave device from operating erroneously or running out of control on resuming communication after communication is interrupted due to the occurrence of abnormal circumstances such as a power failure and the like, wherein a master device transmits a stop condition to the slave device for terminating communication and performs a power failure-processing task when abnormal circumstances such as a power failure or a momentary power failure occurs, and transmits a start condition for reestablishing communication after transmitting a stop condition to the slave device, and the slave device terminates communication on receipt of either stop condition and reestablishes communication on receipt of a start condition. <IMAGE>
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