4、褙荔诃哭軎炝减臧崭冠雍乐拙构颠胙煎侧辰贮硒嗉兮猸艹仳窝耶嫂禄气藻麾皿闼绕嵋浓九婪碗尾筐DESIGNOFCONSTANTPRESSUREWATERSUPPLYCONTROLSYSTEMBASEDPLC资斡蚓捱祉血睫仃巢莓舜纸笪战Abstract:The composition and operational principle of the district constant Pressure闶嵝蜢详泰渚惶寞纳槁馕辉宓栀water supply system based on inverter in the districtareintroduced.Thispaper鲧
5、恽贲顿涩永木盖窑卢睑瘘精焯introduceswatersupplywithconstantpressurecontrolpolicy,cross-section瞀瘵莪凝噎李蜥爝滴拾庠仵墁独analysiswatersupplywithconstantpressuresystemcontrolschematic,expound钺硫举廓盾服痴忽巾楗骗件考捺economicbenefitinapplicationwatersupplywithconstantpressuresystem.Thesystem adoptsmotors of water pumps and to
6、 keep the press constant. This system 牌绉估渐古筏跤锫扦鬏扼善笮渫canincreases water supply quantity.PLCisasolidstatedeviceusedtocontrolmachinemotionorprocessoperationbymeansofastaredprogram.ThePLCsendsoutputcontrolsignalsandreceivesinputsignalsthroughinput/out(I/O)devices.PLCdesignisforbadindustriale