ABSTRACT
Along with the technical development of maritime engine automatization, the automation degree of the ships is more and more high. The control of marine boiler system on board is a important question for discussion of technology and automatization technology. The reason is that the control count for much with efficiency and reliability of boiler.
The old control system mainly using relay and contact now can’t meet the high and complicated requirements of modern ship to control its boiler. It is imperative under the situation to use computer for ship control on board modern ship. The applying of programmable controller( PLC) in the current industry process control realm is the most simple and dependable path that makes its Computerized. This text namely adopt the PLC to implement the control design of the marine boiler. First,the paper introduce the automation summarizer of marine boiler and the basic principle of PLC(SIEMENS PLC S7-200 of Germany). Following, the paper introduce a typical boiler system of shipping. On this base, the paper pay more attention to making control programme of S7-200 for oil auxiliary boiler. In order to validate the function of control programme , a simple mathe mold is set up and a boiler model is manufactured by using VB software , and the model can communicate with PLC through programming ,then PLC controller can control the boiler model. Besides, In PLC experiment teaching, the way that this kind of model combines with the PLC is also a kind of teaching means that has the reference value.
Keywords: marine auxiliary boiler autocontrol
PLC boiler model