PLC的网络通信在工业现场控制中的应用

摘要

：The current electric controlling system based on PLC on networkis expanded.How to build up networking communicating environment between PLC and computer and how to develop networking communicating software using microsoft VB are mainly introduced.The work will benefit to the future application on the field controlling system based on PLC.%对现有基于PLC的电气控制系统进行了网络扩展，论述了PLC与上位机网络通信环境的建立及用VB开发PLC与上位机的网络通信软件。对基于PLC工业现场控制系统的应用具有一定的借鉴作用。