【摘要】：遠方終端是一種通用的工業(yè)過程控制產(chǎn)品,廣泛應(yīng)用于工業(yè)自動化的領(lǐng)域。本課題來源于項目組的校企合作項目,主要完成一款具有自主知識產(chǎn)權(quán)的小型化、經(jīng)濟性的Mini型RTU設(shè)計,應(yīng)用于協(xié)作企業(yè)的工程和產(chǎn)品推廣。針對用戶的技術(shù)要求,本文采用廣州宏晶公司出品的STC12C5A系列新一代MCS-51微控制器為核心設(shè)計實現(xiàn)該RTU的硬件平臺,并對機架在導(dǎo)軌上的安裝方法,進行標準化設(shè)計。該RTU采用24V直流電源模塊供電,實現(xiàn)了8路DI,8路AI,4路AO、8路DO等過程通道,實現(xiàn)工業(yè)現(xiàn)場的數(shù)據(jù)采集和安全監(jiān)控;設(shè)計一路RS232接口來用于軟件下載和超級終端通信,一路RS485接口和一個以太網(wǎng)口來用于與外部計算機通信。針對產(chǎn)品的應(yīng)用場合,硬件平臺選用工業(yè)級芯片設(shè)計,保證產(chǎn)品能在-40℃~+80℃溫度范圍內(nèi)工作,并進行了專門的抗電磁干擾設(shè)計,確保產(chǎn)品在惡劣的電磁環(huán)境中能夠可靠穩(wěn)定的工作。RTU軟件基于前后臺軟件的框架設(shè)計,實現(xiàn)數(shù)據(jù)的采集、控制輸出以及與外部計算機的數(shù)據(jù)通信的傳輸功能。本文所設(shè)計的RTU功能完善,抗干擾能力強,具有較高的應(yīng)用和推廣價值。項目研究的關(guān)鍵點在于抗干擾的設(shè)計。工業(yè)過程產(chǎn)品的應(yīng)用場合和運行環(huán)境惡劣,電磁干擾比較嚴重。根據(jù)用戶要求,所設(shè)計的產(chǎn)品要滿足抗工業(yè)4級電磁干擾能力。為了解決這一問題,硬件平臺設(shè)計時,在輸入電源、輸入/輸出過程通道、通信通道和狀態(tài)指示燈電路都采取的隔離措施,布線設(shè)計時保證足夠的爬電距離,確保產(chǎn)品抗電磁干擾的能力。產(chǎn)品理論設(shè)計完成后,同時也需要完成了裝置的安裝和調(diào)試、實時多任務(wù)軟件設(shè)計,并在協(xié)作企業(yè)的實驗室完成了產(chǎn)品的功能和性能指標測試。測試結(jié)果顯示,本文所設(shè)計的RTU的功能和性能指標滿足客戶的需求,達到了項目預(yù)期的研究目標。
[Abstract]:Remote terminal is a universal industrial process control product, which is widely used in the field of industrial automation. This project comes from the project of cooperation between school and enterprise. It mainly completes a miniaturized and economical design of Mini RTU with independent intellectual property rights, which is applied to the engineering and product promotion of cooperative enterprises. According to the technical requirements of the users, the hardware platform of the RTU is designed and implemented with the new series of MCS-51 microcontrollers produced by Guangzhou Hongjing Company as the core, and the installation method of the frame on the guide rail is standardized. The RTU uses 24V DC power supply module to supply power, realizes 8 DIO8 AIO4 AOO8 do process channels, realizes data acquisition and security monitoring in industrial field, and designs RS232 interface for software download and super terminal communication. A RS485 interface and an Ethernet port are used to communicate with external computers. In view of the application of the product, the hardware platform is designed with an industrial chip to ensure that the product can work in the temperature range of -40 鈩，

本文編號：2128936