| 摘要 |
PURPOSE:To continuously operate the body to be controlled of a slave station without interruption even if the fetching of communication information is interrupted by providing a signal processing part generating a detection signal which shows whether communication information is fetched from a master station to the slave station for a prescribed period or not. CONSTITUTION:The signal processing part 32 which fetches information (d) transmitted from the master station 10 at every prescribed period, and generates the detection signal (a) showing whether information (d) is fetched at every prescribed period or not, and a control part 33 which operates a lamp 34 based on the detection signal (a) are provided in the slave station 30. When the signal processing part 32 continuously outputs the detection signal (a) of an L level or an H level at the interruption time of the fetch of information (d), it can hold a lose contact state, and holds a control signal before it detects the interruption of the fetching of information (d). Even if it goes to the lose contact state, the controlled body of the slave station can continuously be controlled and the operation of the controlled body is prevented from being interrupted. |
