| 摘要 |
PURPOSE:To reduce the hardware quantity and to simplify the software control for change of systems by displaying the switch of systems to secondary processors of each system through a main processor and at the same time delivering the information to urge confirmation of the display. CONSTITUTION:All processors and buses of each system are limited to perform the transfer of signals within each own system only. Here a main processor 11-0 performs the change of systems owing to a trouble of the working system 0 and therefore the system switch indicating parts 15-0 and 15-1 transmit the system switch indicating signals to corresponding secondary processors 12-01-12-0k and 12-11-12-1k, respectively. Thus it is displayed through a system switch display part that the systems 0 and 1 are defined as spare and working ones respectively for each secondary processor. In addition, the switch of systems is informed to each secondary processor in each own system through system switch informing parts 16-0 and 16-1 set at the side of the processor 11-0, Thus each secondary processor is urged to look at the display. As a result, the coincidence is secured between the working and spare systems of both the main and secondary processors respectively. |
