The design of the main research for the library of the controller is based on PLC lighting system. The system USES heat release temperature sensor and photoconductive resistance tube collect and input signals, then transfer to PLC, through the PLC control system and the opening of the library lighting turned off, so as to achieve the purpose of saving energy.
The study of thus design is mainly focus on the PLC remote controled library lighting system . This system make use of the thermo temperature senser and the light sensetive electric resistor to collect the input data and then transform the data to the PLC.Though the open and cut down of the PLC controlled library lighting system, so as to reach the goal of reducing the electric energy used.
The design mainly focuses on the library lighting system controled by PLC . In this system, temperature senser and light sensetive electric resistor is used to collect and input data, and then the data is transformed to PLC. PLC is designed to control the library lighting system‘s on and off ，so as to reduce electric energy
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