【摘要】 当前适用于工业应用的网络主要有 DCS局部网络、工业以太网、现场总线网络三种。而现场总线网络实现了现场智能仪表和控制室之间的全数字化、双向、多站点通信 ,发展迅速 ,有取代 DCS的趋势。根据中小型污水处理厂实际控制环境和性能价格比 ,选用PROFIBUS现场总线作为操作员站和各现场控制站之间的通信网络。 PROFIBUS现场总线有 DP、PA、FMS三种系列 ,其中 PROFIBUS-DP是应用于现场级控制的。在组成PROFIBUS-DP的电气网络配置之后 ,利用 STEP7或 COM PROFIBUS对网络组态和参数化 ,由用户按照协议规定编写通信软件 ,可以满足以较低的系统成本取得较高的性能价格比 ,并能适应今后控制系统扩展的需要更多还原

【Abstract】 The main industrial networks today are DCS local network, Ethernet and field bus.The field bus is replacing the DCS because of the numerical two\|direction communication between the intellective meter and the control center. Considering the actual control requirement and the ratio of performance to price in a mini\|medium sewage work, this paper compares and analyzes several industrial network patterns, and brings forward a communication network scheme, which is based on PROFIBUS field bus. The PROFIBUS field bus has DP, PA and FMS series. The PROFIBUS\|DP is used in field level control. After building the electrical networks in PROFIBUS\|DP way, setting the networks by STEP 7 or COM PROFIBUS software, and programming the communication software, it will get a high ratio of performance to price, as well as meeting the need of system expanding in the future.更多还原