1.使用方便，編程簡(jiǎn)單
采用簡(jiǎn)明的梯形圖、邏輯圖或語(yǔ)句表等編程語(yǔ)言，而無(wú)需計(jì)算機(jī)知識(shí)，因此系統(tǒng)開(kāi)發(fā)周期短，現(xiàn)場(chǎng)調(diào)試容易。另外，可在線修改程序，改變控制方案而不拆動(dòng)硬件。
2.功能強(qiáng)，性能價(jià)格比高
一臺(tái)小型PLC內(nèi)有成百上千個(gè)可供用戶(hù)使用的編程元件，有很強(qiáng)的功能，可以實(shí)現(xiàn)非常復(fù)雜的控制功能。它與相同功能的繼電器系統(tǒng)相比，具有很高的性能價(jià)格比。PLC可以通過(guò)通信聯(lián)網(wǎng)，實(shí)現(xiàn)分散控制，集中管理。
3.硬件配套齊全，用戶(hù)使用方便，適應(yīng)性強(qiáng)
PLC產(chǎn)品已經(jīng)標(biāo)準(zhǔn)化、系列化、模塊化，配備有品種齊全的各種硬件裝置供用戶(hù)選用，用戶(hù)能靈活方便地進(jìn)行系統(tǒng)配置，組成不同功能、不同規(guī)模的系統(tǒng)。PLC的安裝接線也很方便，一般用接線端子連接外部接線。PLC有較強(qiáng)的帶負(fù)載能力，可以直接驅(qū)動(dòng)一般的電磁閥和小型交流接觸器。

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