| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an RF optical transmission device that enables a master station device to communicate data with only the slave device(s), capable of surely receiving a data signal that the master station device sends. <P>SOLUTION: Through the RF optical transmitting device, a proper response is returned from a slave station device, on the condition that the quality of transmission to the slave station device be proper, when a master station device 30 transmits a data signal requiring the response by broadcast communication to slave station devices 60 to 6n; but when the transmission quality is not proper, the proper response is not returned. When the proper response is returned from any of the slave station devices 60 to 6n, the transmission by the broadcast communication is repeated, as many time as preset. Nonetheless if there is a slave station device which does not return the proper response, that slave station device is excluded from objects of data communication in the current control cycle and data are communicated with only slave station devices having returned the proper response. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
