3、eimprovementofautomatedproduction,thePLCapplicationsareusedintheproductioncontrolsystemincreasingly.This designrequirements tocontrol the transport of the workshop productionlineproducts.Becauseofthetraditional relaycontrol hasitsownshortcomings,cannotmeet the designrequirementsfully,the character
4、istics of thePLCarethe abilitytocontrol, precision,highreliability, complexlogic andcomputingcapacity, andmeet the needs of the pipeline controlfully.Thisdesign uses theSiemens S7-200PLC,discussesthedesignmethodsofamotorwagonoftransportmaterialscontrolsystemhardwareandsoftware,andcontroltheoryfori