3HAC025729-001
3HAC025729-001
3HAC025729-001
PC控制的新希望是Windows CE操作系統(tǒng)。其占用空間非常小，有實(shí)時(shí)性能。工業(yè)界已經(jīng)看到WinCE的產(chǎn)品。
區(qū)別不同之處
有關(guān)PC控制最著名的成功案例大多來(lái)自于底特律的通用汽車(chē)Powertrain制造基地。在那里，分布在十幾個(gè)工廠(chǎng)的超過(guò)300個(gè)PC每天工作在機(jī)器生產(chǎn)線(xiàn)。梯形邏輯PLC已經(jīng)完全消失，向Powertrain提供新機(jī)器的OEM必須符合PC控制指標(biāo)。
Nematron Corp公司的市場(chǎng)部經(jīng)理John Dunlap解釋說(shuō)：“對(duì)于GM，關(guān)鍵的好處是PC所用的流程圖軟件。”1986年由位于Warren 的Hydra-matic工廠(chǎng)首先引入。工程師對(duì)軟件的透明性和所提供高級(jí)診斷能力感到驚訝，宕機(jī)時(shí)間也大大較少。這個(gè)技術(shù)立即擴(kuò)展到其他工廠(chǎng)。“但是實(shí)際很難準(zhǔn)確得到時(shí)間較少的數(shù)值。因?yàn)镻owertrain把它作為主要的競(jìng)爭(zhēng)優(yōu)勢(shì)而籠罩著神秘氣氛。”Dunlap說(shuō)。
Nematron在1994從FloPro的發(fā)明人Ron Lavallee那里得到該軟件，使其運(yùn)行在Windows NT下，并且增加了自己的HyperKernel程序，可把NT分成250微秒間隔的時(shí)間片斷，以保證實(shí)時(shí)響應(yīng)。“奔騰III在250微秒內(nèi)可以處理4,000個(gè)I/O，” Dunlap說(shuō)。流程圖軟件與Nematron堅(jiān)固的工業(yè)PC相結(jié)合在Powertrain已經(jīng)被廣泛接受。
另一個(gè)位于A(yíng)nn Arbor---美國(guó)流程圖軟件中心的Entivity，是先前的Steeplechase Software公司、Think and Do公司合并而來(lái)。現(xiàn)在部分由Schneider Electric公司所有。工業(yè)經(jīng)驗(yàn)豐富的Ken Spenser先生在Texas Instruments工業(yè)自動(dòng)化部門(mén)出售給Siemens之前曾經(jīng)領(lǐng)導(dǎo)該部門(mén)，擔(dān)任總裁兼CEO。雖然Entivity的兩個(gè)軟件產(chǎn)品Entivity Studio和Visual Logic Controller的由來(lái)不同，它們都是基于流程圖，并且進(jìn)入各種行業(yè)的數(shù)百個(gè)不同的應(yīng)用中。Entivity的網(wǎng)站(www.entivity.com) 有特別好的內(nèi)容說(shuō)明流程圖軟件的強(qiáng)大功能和在各種工業(yè)的應(yīng)用。
ABB Power Board YTE 102C YT213001-AC/5 Refurbished
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