Multi - channel Electrical Information Acquisition and Control System based on PLC and RS485 Bus Network

摘要

Based on PLC control technology and RS485 bus network communication technology, a multi - channel electrical information acquisition and control system provided by this paper for teaching building to achieve centralized management of the entire teaching building and prevent serious waste of energy resources. The whole system is based on pc host computer, the plc controller for the slave, through the RS485 bus network communication, to achieve the real-time feedback control between a number of slave and a host. The system can be used to achieve the statistics of real-time power consumption for classroom, and provide energy-saving with decision-making basis, with a wide range of applications.