機(jī)型選擇的其他考慮：在考慮上述性能后，還要根據(jù)工程應(yīng)用實(shí)際考慮其他
些因素包括：
a. 性能價(jià)格比。毫無疑問，高性能的機(jī)型必然需要較高的價(jià)格。在考慮滿足需要的性能后，還要根據(jù)工程的投資狀況來確定選型。

b. 備品備件。無論什么樣的設(shè)備，投入生產(chǎn)后都要具有 定數(shù)量的備品備件。在系統(tǒng)硬件設(shè)計(jì)時(shí)，對(duì)于 個(gè)工廠來說應(yīng)盡量與原有的設(shè)備統(tǒng) 機(jī)型，這樣 來就可以減少備品備件的種類和資金積壓。同時(shí)還要考慮備品備件的來源，所選機(jī)型要有可靠的定貨來源。

c. 技術(shù)支持。 選擇機(jī)型時(shí)還要考慮有可靠的技術(shù)支持。這些支持包括必要的技術(shù)培訓(xùn)、設(shè)計(jì)指導(dǎo)、系統(tǒng)維修等內(nèi)容。
4. 輸入/輸出模塊的選擇
可編程控制器與工業(yè)生產(chǎn)過程的聯(lián)系是通過各種I/O模塊實(shí)現(xiàn)的。通過I/O接口模塊，可編程控制器檢測(cè)到所需的過程信息，并將處理結(jié)果傳送給外部過程，驅(qū)動(dòng)各種執(zhí)行機(jī)構(gòu)，實(shí)現(xiàn)工業(yè)生產(chǎn)過程的控制。在可編程控制器構(gòu)成的控制系統(tǒng)中，需要 多的就是各種I/O模塊。為了適應(yīng)各種各樣的過程信號(hào)，相應(yīng)地有許多種I/O模塊。它們包括數(shù)字量輸入/輸出模塊、模擬量輸入/輸出模塊、各種通眩塊。本書將從應(yīng)用角度出發(fā)，討論各種I/O模塊的選擇原則及注意事項(xiàng)。

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★ 公司名：廈門興銳嘉進(jìn)出口有限公司

★ 聯(lián)系人：劉工

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主營(yíng)：FOXBORO,AB、ABB、Scheneider、Siemens、FANUC，安川，GE

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