HDD2.2-W040N在有些行業(yè),F(xiàn)CS是由PLC發(fā)展而來的;而在另一些行業(yè),F(xiàn)CS又是由DCS發(fā)展而來的,所以FCS與PLC及DCS之間有著千絲萬縷的聯(lián)系,又存在著本質(zhì)的差異。
PLC、DCS、FCS三大控制系統(tǒng)的基本特點(diǎn)
HDD2.2-W040N目前,在連續(xù)型流程生產(chǎn)自動(dòng)控制(PA)或習(xí)慣稱之謂工業(yè)過程控制中,有三大控制系統(tǒng),即PLC、DCS和FCS。它們各自的基本特點(diǎn)如下:
PLC
(1)從開關(guān)量控制發(fā)展到順序控制、運(yùn)送處理,是從下往上的。
(2)連續(xù)PID控制等多功能,PID在中斷站中。
(3)可用一臺PC機(jī)為主站,多臺同型PLC為從站。
(4)也可一臺PLC為主站,多臺同型PLC為從站,構(gòu)成PLC網(wǎng)絡(luò)。這比用PC機(jī)作主站方便之處是:有用戶編程時(shí),不必知道通信協(xié)議,只要按說明書格式寫就行。
(5)PLC網(wǎng)格既可作為獨(dú)立DCS/TDCS,也可作為DCS/TDCS的子系統(tǒng)。
(6)大系統(tǒng)同DCS/TDCS,如TDC3000、CENTUMCS、WDPFI、MOD300。
(7)PLC網(wǎng)絡(luò)如Siemens公司的SINEC—L1、SINEC—H1、S4、S5、S6、S7等,GE公司的GENET、三菱公司的MELSEC—NET、MELSEC—NET/MINI。
(8)主要用于工業(yè)過程中的順序控制,新型PLC也兼有閉環(huán)控制功能。
(9)制造商:GOULD(美)、AB(美)、GE(美)、OMRON(日)、MITSUBISHI(日)、Siemens(德)等。
DCS或TDCS
(1)分散控制系統(tǒng)DCS與集散控制系統(tǒng)TDCS是集4C(Communication,Computer,Control、CRT)技術(shù)于一身的監(jiān)控技術(shù)。
(2)從上到下的樹狀拓?fù)浯笙到y(tǒng),其中通信(Communication)是關(guān)鍵。
(3)PID在中斷站中,中斷站聯(lián)接計(jì)算機(jī)與現(xiàn)場儀器儀表與控制裝置。
(4)是樹狀拓?fù)浜筒⑿羞B續(xù)的鏈路結(jié)構(gòu),也有大量電纜從中繼站并行到現(xiàn)場儀器儀表。
(5)HDD2.2-W040N模擬信號,A/D—D/A、帶微處理器的混合。
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HDD2.2-W040N
HDS02.2-W040-HS32
HDS02.2-W040N-H
HDS02.2-W040N-HS12-01
HDS02.2W040N-HS12-01-FW
HDS02.2-W040N-HS12-01-FW
HDS02.2-W040N-HS32-01-FW
HDS03.2-W075N-HS12-0
HDS03.2-W100N-HS12-01-FW
HDS03.2-W100N-HT25-01-F
HDS03.2-W100N-HS12-01-FW
HDS03.2-W100N-HS12-01-F
HDS03.2-W075N-HS12-01-FW
HDS03.2-W100N-HS32-01-FW
HDS03.2-W100N-HS45
HDS03.2-W075N-HS32-01-FW
HDS04.1-W200N-HS12-01-FW
HDS04.1-W200N-HS12-0
HDS04.2-W200N
HDS04.2-W200N-HA
HDS04.2-W200N-HS12-0-1-FW
HDS04.2-W200N-HS12-01-FW
HDS04.2-W200N-HS45-01-FWIC646DUR001
IC646DUR101
IC646IFCLNTCRO005C
IC646IFCLNTCRO005K
IC646IFCLNTCRO005M
IC646IFCLNTCRO010C
IC646IFCLNTCRO010K
IC646IFCLNTCRO010M
IC646IFCLNTCRO025C
IC646IFCLNTCRO025K
IC646IFCLNTCRO025M
IC646IFCLNTCRO050C
IC646IFCLNTCRO050K
IC646IFCLNTCRO050M
IC646IFCLNTCRO100C
IC646IFCLNTCRO100K
IC646IFCLNTCRO100M
IC646MBL001
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