Study And Realization Of Three Layers Industry Control Network Base Onprogrammable Controller

This system realizes the industry control of the three layers network. The so-called three layers network, is a frame that three communication layers in EtherNet, ControlNet, DeviceNet. At the industry on the net controlling computer can change the data with the other computer of the business enterprise , passing to establish customer application procedure, realize long-distance supervise and control; the net is the commanding center of that system, can realize the request control strategy; On the equipments net of every kind of spread to sensor , gentle importation output, electrical engineering switch etc. NT613C link the CVM1H can set up the temperature of the furnace.This paper put forward a total frame of software and hardware of auto-control that is applied in heat-treatment technology of carbon potential furnace. Its function consists of data-gathering, digital trap, data signal, flag alarm, digit communication and so on. The practical software edit in Dephi7. Its function embraces five aspects: parameter setting, digit communication, on-site monitoring, data recording and so on. There is a- audio-visual convenient operation interface in this system. The operator controls carbon potential furnace by clicking button or choosing menu in central control room. This design has splendid universal , possesses extensive and is worth energetically widespread.