微型PLC在集中供热调度自动化系统中的应用

Application of Micro-PLC in Heat Supply Schedule Automation System

长期以来 ,供热SCADA系统的RTU都采用单片机为核心来设计 ,其价格低廉但开放性不好 ,而近年来出现的微型PLC则是一种性能价格比很高的产品 ,很多优点是单片机无法比拟的 ,本文比较了几种常用的RTU类型 ,并且给出了用PLC来设计RTU的一个实例。

For a long time, the design of RTU (remote terminal unit) in heat supply SCADA system is based on SCM (Single Chip Microcomputer). In spite of its low price, it has the greatest shortcoming of low openness. Comparing with SCM, the new style of Micro-PLC has many advantages including higher performance VS. lower price. Several common kinds of RTU is brought forward in this thesis and an example of designing RTU is discussed at the end of it.