PLC是一種可編程控制器，應(yīng)用的范圍是非常廣泛的。用戶在使用PLC的時候?qū)τ赑LC的知識都了解多少呢，PLC與繼電器相比的優(yōu)勢有哪些大家都知道嗎，下面儀器儀表世界網(wǎng)小編就來詳細的介紹一下吧。

    1、功能強，性能價格比高

    一臺小型PLC內(nèi)有成百上千個可供用戶使用的編程元件，有很強的功能，可以實現(xiàn)非常復(fù)雜的控制功能。與相同功能的繼電器相比，具有很高的性能價格比?？善绦蚩刂破骺梢酝ㄟ^通信聯(lián)網(wǎng)，實現(xiàn)分散控制，集中管理。

    2、硬件配套齊全，用戶使用方便，適應(yīng)性強

    可編程序控制器產(chǎn)品已經(jīng)標準化，系列化，模塊化，配備有品種齊全的各種硬件裝置供用戶選用。用戶能靈活方便的進行系統(tǒng)配置，組成不同的功能、不規(guī)模的系統(tǒng)。楞編程序控制器的安裝接線也很方便，一般用接線端子連接外部接線。PLC有很強的帶負載能力，可以直接驅(qū)動一般的電磁閥和交流接觸器。

    3、可靠性高，抗*力強

    傳統(tǒng)的繼電器控制系統(tǒng)中使用了大量的中間繼電器、時間繼電器。由于觸點接觸不良，容易出現(xiàn)故障，PLC用軟件代替大量的中間繼電器和時間繼電器，僅剩下與輸入和輸出有關(guān)的少量硬件，接線可減少互繼電器控制系統(tǒng)的1/10--1/100，因觸點接觸不良造成的故障大為減少。

    PLC采取了一系列硬件和軟件抗干擾措施，具有很強的抗*力，平均*時間達到數(shù)萬小時以上，可以直接用于有強烈干擾的工業(yè)生產(chǎn)現(xiàn)場，PLC已被廣大用戶*為zui可靠的工業(yè)控制設(shè)備之一。

    4、系統(tǒng)的設(shè)計、安裝、調(diào)試工作量少

    PLC用軟件功能取代了繼電器控制系統(tǒng)中大量的中間繼電器、時間繼電器、計數(shù)器等器件，使控制柜的設(shè)計、安裝、接線工作量大大減少。

    PLC的梯形圖程序一般采用順序控制設(shè)計方法。這種編程方法很有規(guī)律，很容易掌握。對于復(fù)雜的控制系統(tǒng)，梯形圖的設(shè)計時間比設(shè)計繼電器系統(tǒng)電路圖的時間要少得多。

    PLC的用戶程序可以在實驗室模擬調(diào)試，輸入信號用小開關(guān)來模擬，通過PLC上的發(fā)光二極管可觀察輸出信號的狀態(tài)。完成了系統(tǒng)的安裝和接線后，在現(xiàn)場的統(tǒng)調(diào)過程中發(fā)現(xiàn)的問題一般通過修改程序就可以解決，系統(tǒng)的調(diào)試時間比繼電器系統(tǒng)少得多。

    5、編程方法簡單

    梯形圖是使用得zui多的可編程序控制器的編程語言，其電路符號和表達方式與繼電器電路原理圖相似，梯形圖語言形象直觀，易學(xué)易懂，熟悉繼電器電路圖的電氣技術(shù)人員只要花幾天時間就可以熟悉梯形圖語言，并用來編制用戶程序。

    梯形圖語言實際上是一種面向用戶的一種高級語言，可編程序控制器在執(zhí)行梯形圖的程序時，用解釋程序?qū)⑺?ldquo;翻譯”成匯編語言后再去執(zhí)行。

    6、維修工作量少，維修方便

    PLC的故障率很低，且有完善的自診斷和顯示功能。PLC或外部的輸入裝置和執(zhí)行機構(gòu)發(fā)生故障時，可以根據(jù)PLC上的發(fā)光二極管或編程器提供的住處迅速的查明故障的原因，用更換模塊的方法可以迅速地排除故障。

    7、體積小，能耗低

    對于復(fù)雜的控制系統(tǒng)，使用PLC后，可以減少大量的中間繼電器和時間繼電器，小型PLC的體積相當于幾個繼電器大小，因此可將開關(guān)柜的體積縮小到原來的確1/2-1/10。

    PLC與繼電器相比的優(yōu)勢已經(jīng)介紹完了，PLC的配線比繼電器控制系統(tǒng)的配線要少得多，故可以省下大量的配線和附件，減少大量的安裝接線工時，可以減少大量費用。

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Reliance 0-57200
Reliance 0-57401-C
Reliance 0-57404-2F
Reliance 0-57405-D
Reliance 0-57406-D
Reliance 0-57408-B
Reliance 0-57412
Reliance 0-57413
Reliance 0-57552
Reliance 0-58219-30
Reliance 0-58504
Reliance 0-58719-B
Reliance 0-60000
Reliance 11C409S
Reliance 11C57S
Reliance 11C59S
Reliance 14C103
Reliance 14C104
Reliance 14C204
Reliance 14C310U
Reliance 1SU44003
Reliance 2GU41002
Reliance 2SI3000
Reliance 411027-51S
Reliance 45C1
Reliance 45C15 / C
Reliance 45C15A
Reliance 45C1A
Reliance 45C201
Reliance 45C305
Reliance 45c307a
Reliance 45C321
Reliance 45C340
Reliance 45C344
Reliance 45C37A
Reliance 45C40
Reliance 45C42
Reliance 45C60
Reliance 45C63
Reliance 45C66
Reliance 45C66A
Reliance 45C67
Reliance 45C69
Reliance 45C901
Reliance 45C913
Reliance 45C92
Reliance 45C940
Reliance 45C966
Reliance 54394
Reliance 54394-1
Reliance 57402-C
Reliance 57406
Reliance 57407-4
Reliance 57407-4
Reliance 57491
Reliance 57516
Reliance 57C329
Reliance 57C330
Reliance 57C409
Reliance 57C410A
Reliance 57C411
Reliance 57C416
Reliance 57C421A
Reliance 57C421B
Reliance 57C430
Reliance 57C431
Reliance 57C435
Reliance 57C491
Reliance 57C554
Reliance 601739-Y
Reliance 610273-14s
Reliance 612404-7R
Reliance 612405-9R
Reliance 612405-9R
Reliance 61C22A
Reliance 801443-8ZS
Reliance 803456-21T
Reliance 803456-2R
Reliance 803456-37RC
Reliance 803612-SE
Reliance 805403-2R
Reliance 805405-1R
Reliance 84543-133
Reliance 9VT401-014HTAN
Reliance F-014962
Reliance Motomatic II
Reliance S-6R8512
Reliance SP500
Reliance WU4001179
Remote Display RD-300
Remote Display RD-300
Renishaw a-2037-0010-03
Rice Lake Weighing Systems IO-810-3A
Rosemount 8712ct12m4
Rosemount 8712ct12m4
Saftronics CIMR-G3U21P5
Saftronics CIMR-G3U42P2
Saftronics CIMR-G3U47P5
Saftronics CIMR-G3U47P5
Samsung LT133X2-154
Scharer 16pc8-3
Scharer 19pc10-1
Schleicher UBA 32/2A C 31409245 713 095
Schleicher UBE 32 ID D 31410062 735 035
Schleicher UBT 16 31106777 42 065
Schleicher UCN20 C 31309837 723 075
Schleicher UKE B 31806981 284 085
Schleicher UKK 100
Schleicher UKZ 31806980 285 095
Schleicher UNG24 31208162 268 095
Schleicher USA 8/1 D/2.1 31511134 880 075
Schleicher USA 8/1 D/2.1 31511134 880 075
Schleicher USB 8-1 D/2.1
Schleicher USP 2A U 31507501 622 075
Schleicher USP 2A U 31507501 622 075
Schleicher USP 2A U 31507501 622 114
Schleicher USP 2A U 31507501 622 114
Schrack RU 110 060
Schroff 20800-188
Seco Q7002
Seco Q7002
Seco Q7002
Seco se2125
Seco SE2302
Servo Dynamics Corp SD2-3060-163-1
Shawmut A4BY 1000
Shawmut TRS250R
Shibaura ID-11005-2
Shimaden SR2201-21B
Sick 7023059
Sick WSU26-120
Sick WSU26-120
Siemens
Siemens 305-01AD
Siemens 305-01BJ
Siemens 305-01T
Siemens 305-04B
Siemens 305-20N
Siemens 305-20T
Siemens 305-22P
Siemens 305-25N