| 摘要 |
PURPOSE:To improve the safety of selective controlling, by actuating the timer of a master station simultaneously when the transmission of a position selection signal is completed to confirm that a selection signal received while the timer actuating is not a selection completion signal due to a position selection signal to be transmitted next. CONSTITUTION:A master station A is provided with a console 1 for forming a position selection signal and control data signal. The console is connected to a central processing unit 3, which performs various arithmetic processing, through a interface 2 for console. A transmission circuit 5 of the master station A transmits a position selection signal to a slave station, and the slave station selects slave station equipment corresponding to the signal to send a selection completion signal to a receiving circuit 6 of the master station A. Simultaneously with the transmission of the position selection signal, the master station actuates a timer basic clock generation circuit 7 and confirms that the selection completion signal received by the circuit 6 while actuating the circuit 7 is not a selection completion signal based on a position selection signal to be transmitted next, and thus the safety of the selective controlling is improved. |
