徐龍艷+翟亞紅
收稿日期:2013-06-19
作者簡介:徐龍艷(1983—),男,湖北巴東人,實驗師,研究方向:汽車裝備自動化。
通訊聯系人,E-mail:longtian1119@163.com
文章編號:1003-6199(2014)03-0052-03
摘 要:本課題是基于西門子PLC的污水處理廠監控系統的設計。根據污水處理廠的特點,本控制系統采用目前國內外普遍應用的基于PLC的二級分布式集散控制系統。控制系統由設在綜合房的中央控制室控制站和分布在現場3個PLC控制站組成,現場控制站由3套西門子PLC組成,通過PROFIBUS總線相互通信。本次設計主要完成對現場流程進行控制以及實現對整個系統的遠程監控,通過現場PLC對各種電氣設備的進行控制,通過變頻器對提升泵的變頻控制,利用wincc組態網實現對整個污水處理流程的監控。
關鍵詞:PLC;PROFIBUS;監控;以太網
中圖分類號:TP29 文獻標識碼:A
Design and Implementation the Control System
of Sewage Treatment Plant Based on PLC
XU Long-yan,ZHAI Ya-hong
(School of Electrical & Information Engineering,Hubei University of Automotive Technology,Shiyan,Hubei 442002, China)
Abstract:This topic is based on Siemens PLC's sewage treatment plant monitoring system design. According to the characteristics of sewage treatment plant, the control system uses the current domestic and universal application of two distributed based on PLC distributed control system. Control system consists of integrated housing in the central control room control station and distributed at the site 3 PLC control station, site controller composed by three sets of Siemens PLC, communicate with each other via PROFIBUS. The design process was completed for the on-site control and the realization of the entire system for remote monitoring through a variety of on-site PLC electrical equipment to be controlled through the drive to enhance the pump frequency control, use wincc configuration of the entire sewage network process flow monitoring.
Key words:PLC;PROFIBUS;monitor;ethernet
1 前 言
花果污水處理廠新建的3萬噸/日城鎮一級污水處理廠及實現2萬噸/日中水回用及配套管網建設工程,建立該系統。該控制系統基于集中管理、分散控制的思想,全廠控制系統由中央控制室和現場控制站組成,現場控制站由3套西門子PLC站,通過PROFIBUS總線相互通信。PLC站與中控室采用環形光纖以太網通訊方式。上位機采用WINCC軟件來進行監測。
2 系統分析
本系統利用PROFIBUS總線將PLC與現場總線模塊相聯接,由成套設備上的自控裝置和檢測儀表等組成信號采集系統,將采集到的現場信息傳到PLC中,完成PLC對現場信息的讀取。通過與自控裝置中設定信息的比較,發出相應的控制指令,從而實現相應的控制目的。通過工業以太網將各個plc站的信息送回總控室,由總控室進行監控。……