3、uctsoftheworkshopproductionlinesAbstractWiththeimprovementofautomatedproduction,thePLCapplicationsareusedintheproductioncontrolsystemincreasingly.This designrequirements tocontrol the transport of the workshop productionlineproducts.Becauseofthetraditional relaycontrol hasit
4、sownshortcomings,cannotmeet the designrequirementsfully,the characteristics of thePLCarethe abilitytocontrol, precision,highreliability, complexlogic andcomputingcapacity, andmeet the needs of the pipeline controlfully.Thisdesign uses theSiemens S7-200PLC,discussesthedesignm