工業(yè)控制網(wǎng)絡(luò)對網(wǎng)絡(luò)的實時性要求很高，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，不能滿足實時性要求，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)計實現(xiàn)的實時以太網(wǎng)［2］就是網(wǎng)絡(luò)中每個節(jié)點的通信被嚴格地限定在規(guī)定時間內(nèi)，確保在同一網(wǎng)段內(nèi)同時只有一臺在發(fā)送數(shù)據(jù)。
關(guān)鍵詞：工業(yè)以太網(wǎng)；確定性；調(diào)度；實時
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