基于编程口的三菱PLC与PC机串行通信实现  

Implementing Serial Communication between PC and MITSUBISHI PLC Based on Self-contained Programming Port

作　　者：柳剑[1] 陈於学[1] 杨曙年[1] 

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《自动化仪表》2010年第11期31-33,37,共4页Process Automation Instrumentation

摘　　要：以PC机和PLC分别构成上、下位机的监控系统在工业控制中有着广泛的应用。介绍了一种不使用通信模块而直接通过PLC自带编程口与PC机实现串行通信的方法,阐述了通信系统内部两种不同标准接口之间通信的基本原理,给出了在LabVIEW开发环境下设计的通信程序,并在FX1N-40MR-001型号的PLC上进行了实验验证。实验结果表明,该通信方式稳定可靠,实现了预期功能,且降低了系统的开发成本,减少了编程工作量。The monitoring system consisting of PC and PLC respectively as the host computer and slave computer has been widely used in process control.The serial communication method by using self-contained programming port of PLC instead of using communication module is presented.The basic principle of communication between two different standard interfaces in the system is described.The communication program designed under LabVIEW environment is given,and is verified in FX1N-40MR-001 PLC.The result of experiments indicates that the communication is reliable to meet predictive function,and reduces developing cost and workload of programming.

关 键 词：PLC PC机 编程口 串行通信 LabVIEW 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]