| 摘要 |
PURPOSE:To attain centralized control of a load at the side of a central control unit by current-controlling the load based on control data received by each terminal, and returning monitoring data in the controlled state. CONSTITUTION:A central control unit 1 transmits signals consisting of a start signal, address data, control data, and a return standby signal, etc., to each terminal 3 in terms of time division. In each terminal 3 a signal processing circuit 5 compares address data of a transmission signal with its inherent address data. When they are coincident, control data is fetched, and fed to a constant current circuit 15 through a D/A convertor 6. Said circuit 15 transmits a current at the prescribed stage corresponding to the control data and supplies it to a load. Monitoring data in the controlled state of the load is returned to the unit 1 from the circuit 5. |
