PLC機型選擇的基本原則是,在功能滿足要求的前提下,選擇zui可靠、維護使用zui方便以及性能價格比的*化機型。
在工藝過程比較固定、環(huán)境條件較好(維修量較小)的場合,建議選用整體式結(jié)構(gòu)的PLC;其它情況則選用模塊式結(jié)構(gòu)的PLC。
對于開關(guān)量控制以及以開關(guān)量控制為主、帶少量模擬量控制的工程項目中,一般其控制速度無須考慮,因此,選用帶A/D轉(zhuǎn)換、D/A轉(zhuǎn)換、加減運算、數(shù)據(jù)傳送功能的低檔機就能滿足要求。
而在控制比較復(fù)雜,控制功能要求比較高的工程項目中(如要實現(xiàn)PID運算、閉環(huán)控制、通信聯(lián)網(wǎng)等),可視控制規(guī)模及復(fù)雜程度來選用中檔或高檔機。其中高檔機主要用于大規(guī)模過程控制、全PLC的分布式控制系統(tǒng)以及整個工廠的自動化等。根據(jù)不同的應(yīng)用對象,表1列出了PLC的幾種功能選擇。 800A 斷路器Cutler-Hammer MDL3800F
現(xiàn)在的 PLC 能夠支持多種通信協(xié)議。比如現(xiàn)在比較流行的工業(yè)以太網(wǎng)等 對通信有特殊要求的用戶
對于一個大型企業(yè)系統(tǒng),應(yīng)盡量做到機型統(tǒng)一。這樣,同一機型的PLC模塊可互為備用,便于備品備件的采購和管理;同時,其統(tǒng)一的功能及編程方法也有利于技術(shù)力量的培訓(xùn)、技術(shù)水平的提高和功能的開發(fā);此外,由于其外部設(shè)備通用,資源可以共享,因此,配以上位計算機后即可把控制各獨立系統(tǒng)的多臺PLC聯(lián)成一個多級分布式控制系統(tǒng),這樣便于相互通信,集中管理。
800A 斷路器Cutler-Hammer MDL3800F
CUTLER HAMMER 10250T-A68 NSFP 10250TA68
CUTLER HAMMER 10250T963C47-3?X NSFP 10250T963C473X
CUTLER HAMMER 10250T963C47-3?X NSFP 10250T963C473X
CUTLER HAMMER 10250T-963-3X NSFP 10250T9633X
CUTLER HAMMER 10250T-844RD06 USPP 10250T844RD06
CUTLER HAMMER 10250T-844RD06 USPP 10250T844RD06
CUTLER HAMMER 10250T-74NG NSFP 10250T74NG
CUTLER HAMMER 10250T-715E USPP 10250T715E
CUTLER HAMMER 10250T-7009 USPP 10250T7009
CUTLER HAMMER 10250T-6303 NSFP 10250T6303
CUTLER HAMMER 10250T-6097 NSFP 10250T6097
CUTLER HAMMER 10250T6032 NSFP 10250T6032
CUTLER HAMMER 10250T-6023 NSFP 10250T6023
CUTLER HAMMER 10250T-5981 NSFP 10250T5981
CUTLER HAMMER 10250T597LRD24?-1X NSFP 10250T597LRD24?1X
CUTLER HAMMER 10250T597LRD24?-1X NSFP 10250T597LRD24?1X
CUTLER HAMMER 10250T-597LLD2?41X NSFP 10250T597LLD24?1X
CUTLER HAMMER 10250T-597LLD2?41X NSFP 10250T597LLD24?1X
CUTLER HAMMER 10250T580C47-1?X USPP 10250T580C471X
CUTLER HAMMER 10250T-579C63-?1X NSFP 10250T579C631X
CUTLER HAMMER 10250T-579C63-?1 NSFP 10250T579C631
CUTLER HAMMER 10250T-579C63-?1 NSFP 10250T579C631
800A 斷路器Cutler-Hammer MDL3800F
CUTLER HAMMER 10250T579C53-1 NSFP 10250T579C531
CUTLER HAMMER 10250T-579C53-?1X USPP 10250T579C531X
CUTLER HAMMER 10250T-579C53-?1X NSFP 10250T579C531X
CUTLER HAMMER 10250T-579C47-?1X USPP 10250T579C471X
CUTLER HAMMER 10250T-579 NSFP 10250T579
CUTLER HAMMER 10250T563C65 USPP 10250T563C65
CUTLER HAMMER 10250T-563C63-?1X USPP 10250T563C631X
CUTLER HAMMER 10250T563C47-7?1X USPP 10250T563C4771?X
CUTLER HAMMER 10250T-563C-47?51 USPP 10250T563C4751
CUTLER HAMMER 10250T-480C48-?3X USPP 10250T480C483X
CUTLER HAMMER 10250T-476C241 NSFP 10250T476C241
CUTLER HAMMER 10250T-463C47-?3X NSFP 10250T463C473X
CUTLER HAMMER 10250T-463C47-?3X NSFP 10250T463C473X
CUTLER HAMMER 10250T-463-3 NSPP 10250T4633
CUTLER HAMMER 10250T452-5 NSFP 10250T4525
CUTLER HAMMER 10250T-452-3 USPP 10250T4523
CUTLER HAMMER 10250T-4511 NSPP 10250T4511
CUTLER HAMMER 10250T-4320 USPP 10250T4320
CUTLER HAMMER 10250T-411C265?3 NSFP 10250T411C2653
CUTLER HAMMER 10250T-397LWD2?4-1 NSFP 10250T397LWD24?1
CUTLER HAMMER 10250T-37NR NSFP 10250T37NR
CUTLER HAMMER 10250T-3532 NSFP 10250T3532
CUTLER HAMMER 10250T3528 NSFP 10250T3528
CUTLER HAMMER 10250T3525 USPP 10250T3525
CUTLER HAMMER 10250T-3524 USPP 10250T3524
CUTLER HAMMER 10250T3519 NSFP 10250T3519
CUTLER HAMMER 10250T3517 NSFP 10250T3517
CUTLER HAMMER 10250T-34Y NSFP 10250T34Y
CUTLER HAMMER 10250T-34W NSFP 10250T34W
CUTLER HAMMER 10250T-334 USPP 10250T334