| 摘要 |
PURPOSE: A control method in a UPS and system thereof is provided to enable main components to be operated even if a CPU has a broken by installing separate CPUs in the main components. CONSTITUTION: A control system comprises first CPU(14) for controlling a rectifier(10), second CPU(24) for controlling an inverter(20), and third CPU(34) for controlling a monitor(30). Data communication among the rectifier(10), the inverter(20) and the monitor(30) is connected via RS-485 multi-drop technique. Even if the third CPU(34) is broken and the operational state of a UPS is not displayed on the monitor(30), a consecutive operation is possible to perform the function of the UPS. If the first CPU(14) of the rectifier(10) is broken, the inverter(20) is consecutively supplied with power from a separate storage battery and the breakdown state is displayed on the monitor(30). Then an operator can confirm the state of the UPS.
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