| 摘要 |
PURPOSE:To make the quantity of a generator smaller by switching a board over on the side of an emergency power source, when a power failure detecting means detects a power failure, and by making processors start in order at constant time intervals. CONSTITUTION:The power source changing system has a plurality of processors 1-8 which are driven by power supplied from a power device 16, and a cross board 19 which switches the normal service power source 15 of the power device 16 over to the imergency-capacity power source 14. Besides, it has a power failure detecting means 41 which judges whether or not power supply from the normal service power source 15 has stopped, and a control device 100 which changes the connection of the cross board 19 on the basis of power failure detection by this power failure detecting means 41. This control device 100 switches the connection of the cross board 19 over on the side of the emergency capacity power source 14, and starts processors 1-8 at constant time intervals in order, when a power failure detecting means 41 detects a power failure. Consequently, it is possible to prevent all the processors 1-8 from starting simultaneouly like before in an instant when a power failure occurs. |
