本文介绍了MOSCAD 典型系统的构成。重点阐述了SCADA 系统具有的合理网络结构、较好的扩展能力和升级能力。MOSCAD 还具有完备的本地测控功能、完善的网络通信功能和独特的网络通信协议(MDLC)。实践证明该系统适用于各种信号采集及监控系统。 关键字:SCADA 监控中心 通讯网络 远程终端单元 编程工具箱 MDLC 协议 Abstract: Typical structure of MOSCAD system is introduced in this paper. The SCADA system has many advantages, such as reasonable net structure, good ability on extension and upgrading, self-contained function on local survey, perfect communication net, and also particular communication agreement( MOSCAD Data Link communications). Experiences show that MOSCAD is suitable for most signal collection and survey systems. Keyword: SCADA; Communication net; RTU; programming Toolbox; MDLC