摘要
介绍了以三菱FX2N系列可编程控制器(PLC)为从站,以工控机(IPC)为主站的RS485集散控制系统的组成。通过分析FX2NPLC支持的计算机链接通信协议,阐述了上位机实现系统操作台的程序流程图,并给出与下位机在Delphi的通信程序代码,实现了一台IPC对多台PLC的监控。
Taking the FX2N family of PLC as the sub-station and IPC as the master station, this paper describes the organization of Distributed Control System through RS485 interface standard. Analyzing computer link communication protocol supported by FX2N family of PLC, the paper discusses the flow chart of system operation interface and supplies the Delphi code of communication between IPC and PLCs. The system approves one IPC can monitor several PLCs.
出处
《北京印刷学院学报》
2008年第4期52-55,共4页
Journal of Beijing Institute of Graphic Communication
关键词
RS485接口标准
PLC
集散控制系统
DELPHI
RS485 interface standard
Programmable Logic Controller
Distributed Control System
Delphi
