| 摘要 |
PURPOSE:To improve the reliability and safety of the titled system by inputting an important signal on the safety of drive to >=2 multiplex stations and supervising a transmitter of a master multiplex station by a salve multiplex station. CONSTITUTION:A switch signal group is inputted simultaneously to >=2 multiplex stations 5, 6. A switch signal less important than the said signal is inputted to either multiplex station of the stations 5, 6 as a switch signal 3 or a switch signal 4. Further, the multiplex station 6 uses a multiplex signal sent from the station 5 to always supervise an error of signal processing sections 5a, 5b of the multiplex station 5 and if the error takes place, a signal stopping the transmission function of the station 5 is sent to stop the transmission. The multiplex station 6 sends the important signal sent from the multiplex station 5 to other multiplex stations 7, 8 at normality to the multiplex stations 7, 8 in place of the multiplex station 5 at the same time.
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