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IC693ALG391

IC693ALG391

大型PLC的應(yīng)用領(lǐng)域多為產(chǎn)值高的產(chǎn)業(yè)，這些產(chǎn)業(yè)對(duì)于產(chǎn)線(xiàn)設(shè)備的風(fēng)險(xiǎn)控管?chē)?yán)格，雖然PLC發(fā)展已有30余年，技術(shù)已經(jīng)相當(dāng)成熟，因此價(jià)格已經(jīng)穩(wěn)定偏低，即使如AB、西門(mén)子等大廠牌，縱使市場(chǎng)報(bào)價(jià)較一般廠商高出一截，但就整體自動(dòng)化設(shè)備而言，其成本比例仍不算高，而另一方面當(dāng)這些大廠再為其產(chǎn)線(xiàn)投保時(shí)，若使用非知名品牌的PLC，保險(xiǎn)公司在風(fēng)險(xiǎn)考量下，也會(huì)調(diào)高保費(fèi)，兩相考量下，這些產(chǎn)業(yè)業(yè)者在成本支出不多的考量下，仍?xún)A向採(cǎi)用高知名度品牌的PLC，臺(tái)灣廠商要切入大型PLC市場(chǎng)，在企業(yè)規(guī)模無(wú)法與外商抗衡下，臺(tái)灣廠商切入不易。

除了應(yīng)用產(chǎn)業(yè)外，在相關(guān)技術(shù)上，中、大型PLC也正在逐步蠶食較不復(fù)雜的DCS與SCADA的應(yīng)用，擴(kuò)大了整個(gè)市場(chǎng)的大餅，對(duì)于大型工業(yè)用戶(hù)而言，以PLC為基礎(chǔ)的自動(dòng)化方案愈來(lái)愈受歡迎，一來(lái)因?yàn)镻LC的穩(wěn)定可靠與現(xiàn)成可用性確實(shí)眾所周知，二來(lái)有經(jīng)驗(yàn)的PLC專(zhuān)業(yè)人才確實(shí)比較容易找到。

至于幾年前一度來(lái)勢(shì)洶洶的PC-based控制器，現(xiàn)在看來(lái)則似乎不容易再對(duì)PLC的地位構(gòu)成威脅，吳順裕認(rèn)為有兩個(gè)塬因，首先是，PLC廠商其實(shí)已經(jīng)把PC-based技術(shù)融入PLC當(dāng)中，用來(lái)提供更多新的功能，這樣一來(lái)，PC-based控制器當(dāng)然很難切入PLC既有的市場(chǎng)，另一個(gè)塬因則是基礎(chǔ)的架構(gòu)不同，PLC一開(kāi)始就是為了自動(dòng)化控制而設(shè)計(jì)，因此其架構(gòu)會(huì)特別貼近自動(dòng)化底層設(shè)備，如馬達(dá)、變頻器等，但PCBased則是從PC而來(lái)，自動(dòng)化控制只是后來(lái)所加上去的功能，因此在與上述的這些底層設(shè)備的溝通介面，設(shè)計(jì)的并不理想，在大型PLC上面，雖然PCBased控制器對(duì)上層架構(gòu)溝通較佳，但這些溝通介面，現(xiàn)在PLC都已可做到，再加上PLC塬有的穩(wěn)定優(yōu)勢(shì)，更是讓PCBased難以跨入大型自動(dòng)化架構(gòu)。

最后再?gòu)腜LC廠商來(lái)看，從記者採(cǎi)訪過(guò)程中，各自動(dòng)化產(chǎn)業(yè)工程師認(rèn)知度最高的PLC品牌，包括了日本叁菱、歐姆龍、德商西門(mén)子及美商洛克威爾(AB)，此外法國(guó)施耐德、美國(guó)GEFanuc、日本的富士、松下、臺(tái)灣的永宏、豐煒、臺(tái)達(dá)等品牌也有相當(dāng)?shù)闹С侄?，雖然樣本有限，以上的結(jié)果僅能供作參考，未必完全符合業(yè)界的真實(shí)狀況，但似乎也可反映出部分工程師對(duì)市場(chǎng)的一般印象。

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