| 摘要 |
PURPOSE:To enable connection of an abnormality monitoring terminal device without varying a software by providing a transmission control circuit which performs transmission of a data in a memory circuit and writing to the memory circuit between with a series data transmission circuit. CONSTITUTION:Elevator abnormality monitoring devices 1-4 connected to elevator control devices 6-11 by an electrically insulated series data transmission system without being mutually influenced by electric abnormality of mutual devices. On the elevator control device 6 side through a telephone circuit network 5, a load generated occasioned by connection of the elevator monitoring terminal devices 1-4 do not exercise any influence on a load of an original elevator control software since an elevator control state is only written in a two-directional memory circuit connected to the elevator abnormality monitoring terminal devices 1-4. This constitution enables mounting of a title device without exercising an influence on an elevator control device for the elevator abnormality monitoring terminal devices by a hardware and a software. |
