MPL-B310P-HK74AA

保證總是能為高優(yōu)先級(jí)數(shù)據(jù)報(bào)文提供足夠的帶寬（和緩沖區(qū)空間）。標(biāo)準(zhǔn)以太網(wǎng)目前還無(wú)法做到這一點(diǎn)。

一體適用的技術(shù)：工業(yè)以太網(wǎng)橫空出世

由于傳統(tǒng)的以太網(wǎng)沒(méi)有足夠的帶寬預(yù)留功能，自動(dòng)化領(lǐng)域的專(zhuān)家從2000年就開(kāi)始著手開(kāi)發(fā)自己的以太網(wǎng)版本。然而，他們選取的開(kāi)發(fā)路徑各不相同。以下方法各有特色：

使用以太網(wǎng)作為現(xiàn)場(chǎng)總線(xiàn)傳輸介質(zhì)的協(xié)議。這些協(xié)議要求自己完全控制以太網(wǎng)介質(zhì)。傳統(tǒng)的TCP/IP通信只能通過(guò)現(xiàn)場(chǎng)總線(xiàn)（EtherCAT?和POWERLINK?）或現(xiàn)場(chǎng)總線(xiàn)（Sercos）分配的通道進(jìn)行搭載?，F(xiàn)場(chǎng)總線(xiàn)牢牢掌握著帶寬控制。

通過(guò)以太網(wǎng)上的時(shí)間分片程序來(lái)保證帶寬預(yù)留的協(xié)議。這里要提一下PROFINET? IRT。IRT支持在運(yùn)行軟實(shí)時(shí)或背景流量的相同電纜上進(jìn)行確定性硬實(shí)時(shí)數(shù)據(jù)傳輸。時(shí)間片的規(guī)劃需要一個(gè)的傳輸路徑時(shí)序模型。

基于共享以太網(wǎng)電纜的協(xié)議。這些協(xié)議使用QoS并非常適用于工廠自動(dòng)化和過(guò)程自動(dòng)化應(yīng)用。PROFINET RT和EtherNet/IP是值得關(guān)注的例子。這些協(xié)議用于軟實(shí)時(shí)（周期時(shí)間≥1 ms）范圍。

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REXROTH  MAC112D-0-FD-2-C/130-A-0 

REXROTH  MAC112D-0-HD-2-C/130-A-0 

Rexroth Indramat  KDR 1.1-100-220-300-W1

REXROTH  MAC112C-0-KD-2-C/180-A-2/S029

REXROTH  MDD115C-N-015-N2L-130GA0

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Bosch  CPU 1070075642 -202 CC10.3

Bosch  CPU 1070075642 -203 CC10.3

Bosch  CPU 1070075642 -204 CC10.3

Rexroth INDRAMAT MAC092B-0-QD-2-F/095-A-0

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Rexroth INDRAMAT MAC112D-1-ED-2-C/130-A-0 

Rexroth Indramat HMS01.1N-W0036-A-07-NNNN

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