Electrical Parameter Acquisition System Based on S7-300/200 PLC and Modbus Protocol
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摘要: 介绍了基于S7-300/200 PLC和Modbus协议的电力参数采集系统的硬件结构和S7-200 PLC的程序设计，阐述了S7-300 PLC通过MPI通信读取S7-200 PLC中存放的电量参数的过程。实际应用表明，该系统应用简便，运行稳定可靠，在工程上具有一定的参考意义。Abstract: The paper introduced hardware structure of electrical parameter acquisition system based on S7-300/200 PLC and Modbus protocol and design of program of S7-200 PLC, and expounded process that S7-300 PLC reads electrical parameters stored in S7-200 PLC through MPI communication. The practical application showed that the system is simple and convenient in application, stable and reliable in running, which has certain reference value in engineering.
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