Abｓtｒact
With tｈｅ deｖelopmｅnｔ oｆ societｙ and eｃoｎoｍｙ，the dｉｓchargｅd
sewage iｓ sｅriouslｙ ｈarmful to the ｑuaｌｉｔy ｏf ｐeoｐｌe's lｉvinｇ ｅnvirｏ
nment，ｔhｅ ｄesign of an eｆfｉcｉenｔ ｓｅｗage treatｍenｔ control ｓｙstｅm haｓ
ｉmportaｎt signiｆicaｎce。Ｃompaｒｉng wｉth the domestｉc seｗagｅ ｔrｅａtmｅｎ
ｔ conｔｒol sｙｓｔem， thｅ thｅsis ｄesigned a sewage tｒeａtment coｎtrol system
ｔhat ｗaｓ bａseｄ on tｈｅ technoloｇy of PLC,the specifiｃ cｏnｔeｎｔs aｒｅ
as foｌlows：
(1）Described the baｓic ｐrinｃiｐlｅ of sewage trｅatmeｎt,cｏmｐlｅted thｅ
overａｌl ｄesign oｆ tｈｅ systｅｍ，and ｄｒａwed the system ｈardwarｅ thｅ main circ
ｕit，power suppｌy cｏntrol ciｒcｕit ａｎｄ PLC ｃontｒol cｉrｃuiｔ;
（2)With tｈe tｅchｎology of ＰLＣ，completeｄ the softwarｅ ｄeｓigｎ of a ｔ
ｏｔａl syｓｔｅｍ fｏｒ tｈe conversiｏn beｔween hand contｒoｌ aｎｄ automａ
tic contrｏｌ mode,ａｎd ｅacｈ ｐａrｔ of the systeｍ＇s startｉng aｎｄ stｏpping ｉ
ｎ autｏｍatiｃ cｏnｔrol ｍode；
（３）Iｔ had fｉnisｈeｄ monitｏriｎg anｄ operatiｎg ｔhe ｓysteｍ’s proceｓ
ses,uｓing the softwａrｅ of configuration。
Siｍｕlaｔｉoｎ eｘｐｅrimenｔs shｏweｄ that， ｔhe dｅsign ｏｆ seｗaｇｅ
tｒｅatｍｅnt contrｏｌ sｙstem has the adｖantaｇeｓ oｆ hiｇh prｏｄuctiｏn efficｉen
ｃy， higｈ reliaｂilｉty， eaｓy ｒealizaｔiｏn ｏf pｒocesｓ ｆloｗ， ｓimpｌe oｐ
ｅｒation,ａnd ｓｏ on .Ｉt can ｍeeｔ the ｎeｅd ｏｆ aｕtomatic control ｏf ｓｅwａge
treatmeｎt pｒoceｓs。
Keｙwordssewaｇｅ treａtｍent PLC ｓofｔｗare ｄeｓｉgn cｏnｆiguｒaｔion
softwaｒｅ
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