描述
在系統(tǒng)的實(shí)現(xiàn)過程中,PLC的編程問題是非常重要的。用戶應(yīng)當(dāng)對(duì)所選擇PLC產(chǎn)品的軟件功能有所了解。通常情況下,一個(gè)系統(tǒng)的軟件總是用于處理控制器具備的控制硬件的。但是,有些應(yīng)用系統(tǒng)也需要控制硬件部件以外的軟件功能。例如,一個(gè)應(yīng)用系統(tǒng)可能包括需要復(fù)雜數(shù)學(xué)計(jì)算和數(shù)據(jù)處理操作的特殊控制或數(shù)據(jù)采集功能。指令集的選擇將決定實(shí)現(xiàn)軟件任務(wù)的難易程度??捎玫闹噶罴瘜⒅苯佑绊憣?shí)現(xiàn)控制程序所需的時(shí)間和程序執(zhí)行的時(shí)間。
5支撐技術(shù)條件的考慮
選用PLC時(shí),有無支撐技術(shù)條件同樣是重要的選擇依據(jù)。支撐技術(shù)條件包括下列內(nèi)容:
(1)編程手段
●便攜式簡(jiǎn)易編程器主要用于小型PLC,其控制規(guī)模小,程序簡(jiǎn)單,可用簡(jiǎn)易編程器。
●CRT編程器適用于大中型PLC,除可用于編制和輸入程序外,還可編輯和打印程序文本。
●由于IBM—PC已得到普及推廣,IBM—PC及其兼容機(jī)編程軟件包是PLC很好的編程工具。目前,PLC廠商都在致力于開發(fā)適用自己機(jī)型的IBM—PC及其兼容機(jī)編程軟件包,并獲得了成功。
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主營(yíng):世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
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⑧Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場(chǎng)輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù)
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結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
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