基于自由口模式的S7-200 PLC与上位机的通信  

Communication between S7-200 PLC and host computer based on free-port mode

作　　者：余中正 武玉[1] 夏永胜[2] 贡马林[1] 

机构地区：[1]中国科学院等离子体物理研究所,安徽合肥230001 [2]合肥工业大学机械与汽车工程学院,安徽合肥230009

出　　处：《微型机与应用》2011年第13期42-44,共3页Microcomputer & Its Applications

基　　金：国家ITER计划(2008GB101000)

摘　　要：详细说明了西门子S7-200 PLC在自由口模式下与上位机通信的实现,主要包括该系统的硬件构成,自由口通信协议的标准,以及上位机软件流程和主控PLC软件设计。通过自由口通信可实现对ITER导体穿缆测力测长系统的监控,将PLC数据传送至上位机,实现对数据的处理以及现场数据的实时显示和远程控制等功能。The communication between the Siemens S7-200 PLC and the host computer under the free-port mode is illuminated in detail. The system hardware configuration and the standard free port communication protocols are included and the software program designing method for host PC and main PLC are also given. This communication is applied to monitor the force and length measurement system for ITER conductor insertion and transport data from PLC to the host computer and also realize the function of data processing, real-time display of on-site data, long distance control and so on.

关 键 词：PLC 通信协议 自由口模式 ITER导体穿缆测力测长系统 上位机 

分 类 号：TP273.01[自动化与计算机技术—检测技术与自动化装置]