基于PLC的实时数据采集系统

摘要

针对某国外品牌的数据采集系统,设计了一种新型的数据采集系统.该系统采用西门子PLC,选用紧凑型CPU,充分利用CPU自身集成的部分I/O和通信接口,简化了系统结构,通用性好,易于扩展.自主开发了PLC程序和上位机数据采集分析软件,实现了高性能、低成本的目的.该系统有硬线连接和网络连接两种方式,主要硬件相同,只需装载相应的PLC程序,灵活性更好.实际应用表明:该系统设计合理、稳定可靠、性价比更高.%For a foreign brand real time data acquisition system,a new real time data acquisition system was designed. The system adopted SIEMENS PLC,selected compact CPU,took full advantage of part I/O and communication interface which were integrated by itself,simplified the system structure,had good versatility and was easy to expand. The PLC program and the data acquisition and analysis software of the computer were developed independently,and the purpose of high performance and low cost were achieved.The system had two ways of hardwire connection and network connection.The main hardware was the same,and only needed to load the corresponding PLC program,so the flexibility was better. The practical application shows that the system is reasonable,stable and reliable,and the cost performance is higher.