Research On Software Integration And Control Technologies In DCS Applications

With the advancement of computer technology, communication technology, control technology and other high technologies, distributed control system(DCS) develops quickly ,with extensive applications in industry production process and other areas. The analyses and implementation applications of DCS software integration and control technologies are presented in this paper.The concept, basic structure, functions and characteristics of distributed control system are explained briefly with the erythromycin fermentation process control system in the background. Then real time database and characteristics of configuration software are analyzed. The applications of DCS-oriented integration technologies are also discussed.Based on PLANTSCAPE control system of Honeywell Corp, the application of VBScript language is proposed, the specific Application Programming Interface (API) and Network API technologies and application realization are analyzed with a comparison given upon the realization of the program. As a more open interfacing approach, a new interface technology OLE for Process Control (OPC) is introduced. And analyses for OPC objects and two access interfaces are given, with sample program tests conducted and steps of the development of the application programming and realization summarized. As typical applications of software integration, the design of the erythromycin fermentation process control system is analyzed and the applications of control and supervisory configuration are discussed, upon which design and realization of soft-sensor based on neural network and the third party application are presented in detail.