PLC控制系统中快速变化数据的采集方法

A acquisition method of quickly changing data of a PLC control system

本文针对专业监控软件的数据采集周期过长的问题,提出了一种将数据先存储在PLC的存储器中,再通过西门子公司提供的通信函数在上位机读出的方法,解决了PLC控制系统中采集快速变化数据的问题。介绍了该系统的硬件组成和软件,较详细地叙述了在VC中如何显式链接动态函数库。

According to the problem of the long data Acquisition periods of professional SCADA software,this paper gives a method which stores data in the memory of PLC and read data by DLL in PC.solves the problem of acquiring the quickly changing data.this paper introduces the hardware and software of this system,and describes how to link DLL in VC.