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Research on PLC in Surveillance and Measurement System of Transformer Station

The paper introduces PLC surveillance and measurement system of 6KV transformer station.The PC of system used the VB development.By means of the RS-232 serial port of microcomputer and the RS-485 serial port of S7-200PLC constitute RS-485 multi-communication network,the system can achieve the real time display and the preserve gathering data and realize the real time supervision and control of voltage,current,active power and power factor etc.
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