| 摘要 |
PURPOSE:To suppress the operation stop of a system by discovering abnormality in an early stage. CONSTITUTION:Concerning the multiplexer provided with plural devices 1 and 2 and a switching mechanism 3 for switching any one of the plural devices 1 and 2 to an active device, each device consisting of multiplexing is provided with an operation table 4 to which the operation schedule of its own device is set, calendar/timer 5 for expressing the present date and time, collation part 6 for deciding whether the present device is designated to the active machine or not by collating this operation table with the calendar/timer at a prescribed time point, and switching instruction part 7 for transmitting a switching instruction signal to the present device to this switching mechanism when the present device is designated to the active machine and according to this operation table 4, each device sets the present device to the active machine. |
