| 摘要 |
PURPOSE:To prevent erroneous control from being performed when abnormality occurs in a microcomputer by performing an arithmetic operation on a control instruction for its own device from a reception part and the inverse control instruction of the control instruction, and outputting a control signal to controlled equipment when a result reaches a prescribed value. CONSTITUTION:Repeaters T1...Tn as terminals for monitoring are connected to a fire receiver RE, and an area bell B and a flue gas damper MD are connected to a repeater T1, and an MPU 2, RAMs 21-25, and ROMs 21 and 22 are provided to the repeater T1. And the control instruction for its own device from the receiver RE is stored in the RAM 21, and the inverse control instruction of the control instruction is stored in the RAM 25, and an arithmetic processing is applied on the storage contents of the RAMs 21 and 25 with the MPU 2. Furthermore, the MPU 2 identifies the content of the control instruction when a computed result reaches the prescribed value, and a corresponding level B or damper MD can be controlled. |
