| 摘要 |
PURPOSE:To change the system in a very short time even if a fault takes place in a system switching signal transmission system by adopting the constitution so that a system switching timing circuit is started by an output signal of a corresponding signal storage section. CONSTITUTION:When a system switching signal is generated in the active system (e.g., system 0), a system switching timing circuit 20 of the active system is started and the active system processor is reset and the operation mode of an operation mode display section 4 is switched. A standby system processor receiving a system switching signal via a system switching signal transmission system 6 is similarly reset. Each system processor to be reset references the operation mode display output corresponding to each system in the operation mode display section 4 and is switched to the operation mode corresponding to the display. When the system switching signal is not given to the standby system (e.g., system 1) via the system switching signal transmission system 6, a signal storage section 81 of the standby system processor is set and a reset signal is generated from the system switching timing circuit 21. |
