ｉncｒeaｓｉng 。Ｉn ｏｒdｅr to impｒｏve tｈe qｕaｌｉｔy oｆ tｈｅ waｔ
er supply syｓtｅm, ｅnerｇｙ conserｖatiｏn， ｓｏ I coｎsiｄered use a proｇraｍ
mable logｉc coｎtroｌｌer， ｒｅlａy and sensor technoloｇｙ， with hａrｄware
ａnｄ software tｏ achｉeｖe low water ｌevel alarｍ, waｒning sｗｉtcｈ ｂeｔ
ｗeｅｎ ｗoｒk and proｃedｕｒｅs manuａl / automatic to ｄｅsｉgn ｐｒ
acticaｌ level conｔrol tower scｈeme． I coｍpleted the set up of thｉs simuｌation
using tｈe ｔaｎｋ waｔer ｔｏwer , basｅd on Sｉeｍeｎｓ S7－３00 PLＣ pr
ｏgｒaｍmabｌe ｃｏntrolｌer tａｎk waｔer lｅｖel conｔｒol sysｔem aｓ ｔ
he cｏｒe 。Ｉ ｃomｐleteｄ a waｔer ｔank ｔo cｏｍplete ｔhe perｆoｒｍaｎ
ｃｅ ｃapaｂｉlitｙ aｉmiｎg ａt doing a nｅeds anaｌysiｓ。 Thｅ maｉn ｅｘp
ｅｒiｍentaｌ ｍethｏd useｄ is to install ａn aｕtomatic ｗater lｅvel measurｉ
ng devｉce ｏn the tanｋ。 Thｅ level sｅnsｏr ｄｅtectｉng the ｗater taｎk
to ｍｅaｓure the actｕal waｔeｒ level anｄ thｅ controｌ moduｌe ｔo send ｉ
ｎfｏｒmatioｎ to ｔhe PLＣ, vｉa A / Ｄ conｖerｓｉoｎ, the datａ ｏbtained is
comｐaｒeｄ with ｔhe ｓｅｔ level， ｔhe contｒｏller procesｓeｓ thｅ data
and senｄｓ the ａpｐroｐriatｅ cｏmmandｓ to coｎtroｌ the mｏｔor ｓpeeｄ
chaｎｇe ｐumｐing rａte， tｈｅ water level maintａｉneｄ ｉｎ the pｒｏｐ
er pｏsｉtion。Thａn Toｕch sｃreｅｎ ｃoｍpletｅs tｈe lｅｖel display， ｆault
alarm iｎfｏrmatiｏn ｄisｐlａｙ， real—time aｎd hｉstｏrical cｕrve curｖes
ｓｈoｗ。If the watｅr level is lower or hｉｇhｅｒ ｔｈan tｈe set ｖaｌue，
the ｈazard ｗarning sigｎal wiｌl be iｓsｕed In thｉs pａpｅｒ ， PLC ａutom
ａtic wａter suｐpｌｙ system based on good execution proceｓs leveｌ cｏｎtro
ｌ 。
Keyｗｏrｄs: ｔoｗeｒ wａter；wａter ｌeｖｅl cｏｎtrol； relays；PLC
目录
