工業(yè)控制網(wǎng)絡(luò)對(duì)網(wǎng)絡(luò)的實(shí)時(shí)性要求很高，不僅要求傳輸速度快，數(shù)據(jù)傳輸還要具有確
定性。以太網(wǎng)的通信存在不確定性，不能滿(mǎn)足實(shí)時(shí)性要求，成為以太網(wǎng)應(yīng)用于工業(yè)控制領(lǐng)域的主要障礙。本設(shè)計(jì)實(shí)現(xiàn)的實(shí)時(shí)以太網(wǎng)［2］就是網(wǎng)絡(luò)中每個(gè)節(jié)點(diǎn)的通信被嚴(yán)格地限定在規(guī)定時(shí)間內(nèi)，確保在同一網(wǎng)段內(nèi)同時(shí)只有一臺(tái)在發(fā)送數(shù)據(jù)。
關(guān)鍵詞：工業(yè)以太網(wǎng)；確定性；調(diào)度；實(shí)時(shí)
Abstract: Industrial control net is a special applicative network, it demands high desired real time processing and deterministic. Non-deterministic communication of ethernet which can't meet the real time demand of industrial control has become a main obstacle in application on filed device layer network. Real-time Ethernet implemented in this design is to build a high speed , deterministic network over traditional Ethernet . The communication among work stations is limited in deterministic time intervals , which guarantte that only one node can send datas in a certain time.
Key words: Industrial Ethernet ; deterministic ; scheduling ; real-time