描述
從應(yīng)用對象的規(guī)模上來說。
PLC一般應(yīng)用在小型自控場所,比如設(shè)備的控制或少量的模擬量的控制及聯(lián)鎖,而大型的應(yīng)用一般都是DCS。當(dāng)然,這個概念不太準(zhǔn)確,但很直觀,習(xí)慣上我們把大于600點(diǎn)的系統(tǒng)稱為DCS,小于這個規(guī)模叫做PLC。我們的熱泵及QCS、橫向產(chǎn)品配套的控制系統(tǒng)一般就是稱為PLC。
說了這么多PLC與DCS的區(qū)別,但我們應(yīng)該認(rèn)識到,PLC與DCS發(fā)展到今天,事實(shí)上都在向彼此靠攏,嚴(yán)格的說,現(xiàn)在的PLC與DCS已經(jīng)不能一刀切開,很多時候之間的概念已經(jīng)模糊了?,F(xiàn)在,我們來討論一下彼此的相同(似)之處。
從功能來說。
PLC已經(jīng)具備了模擬量的控制功能,有的PLC系統(tǒng)模擬量處理能力甚至還相當(dāng)強(qiáng)大,比如西門子的S7 400、AB 的Control Logix 和施耐德的Quantum 系統(tǒng)。而DCS也具備相當(dāng)強(qiáng)勁的邏輯處理能力,比如我們在AC800F上實(shí)現(xiàn)了一切我們可能使用的工藝聯(lián)鎖和設(shè)備的聯(lián)動啟停。
從系統(tǒng)結(jié)構(gòu)來說。
PLC與DCS的基本結(jié)構(gòu)是一樣的。PLC發(fā)展到今天,已經(jīng)全面移植到計算機(jī)系統(tǒng)控制上了,傳統(tǒng)的編程器早就被淘汰。小型應(yīng)用的PLC一般使用觸摸屏,大規(guī)模應(yīng)用的PLC全面使用計算機(jī)系統(tǒng)。和DCS一樣,控制器與IO站使用現(xiàn)場總線(一般都是基于RS485或RS232異步串口通訊協(xié)議的總線方式),控制器與計算機(jī)之間如果沒有擴(kuò)展的要求,也就是說只使用一臺計算機(jī)的情況下,也會使用這個總線通訊。但如果有不止一臺的計算機(jī)使用,系統(tǒng)結(jié)構(gòu)就會和DCS一樣,上位機(jī)平臺使用以太網(wǎng)結(jié)構(gòu)。這是PLC大型化后和DCS概念模糊的原因之一。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門子,摩托羅拉,安川。力士樂。ACSO,橫河等進(jìn)口品牌。 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實(shí)力庫存商家
ALLEN BRADLEY 1336F-BRF100-AE?-EN USPP 1336FBRF100AEEN
ALLEN BRADLEY 1336F-BRF150-AN?-EN-HCS2-L6 AC DRIVE*XLNT*
ALLEN BRADLEY 1336F-BRF150-AN?-EN-HCS2 AC DRIVE **XLNT**
ALLEN BRADLEY 1336F-BRF150-AN?-EN AC DRIVE ***XLNT***
ALLEN BRADLEY 1336F-CWF30-AN-?EN *NEW*
ALLEN BRADLEY 1336F-CWF10-AA-?EN NSFP 1336FCWF10AAEN
ALLEN BRADLEY 1336F-BRF50-AN-?EN-HCS1-L6 USPP 1336FBRF50
ALLEN BRADLEY 1336F-BRF75-AA-?EN NSPP 1336FBRF75AAEN
ALLEN BRADLEY PLUS II 1336F-BRF75-AA-?EN-HCS2-L6 New
ALLEN BRADLEY 1336F-BRF50-AA-?EN-HCS2-LA2-LA3?-L4 USPP 13
ALLEN BRADLEY 1336F-BRF100-AA?-EN-L6 USPP 1336FBRF100AAE
Allen Bradley 1336F-BRF50-AA-?EN-HAS2-LA2-L6 Drive *NIB*
ALLEN BRADLEY 1336F-BRF50-AA-?EN-HA2-L6 USPP 1336FBRF50A
ALLEN BRADLEY 1336F-BRF100-AE?-EN-HAS2-L5 USPP 1336FBRF1
ALLEN BRADLEY 1336F-BRF100-AE?-EN-L5 AC DRIVE 10HP NIB!
ALLEN BRADLEY 1336F-CWF10-AA-?EN NSPP 1336FCWF10AAEN
ALLEN BRADLEY 1336F-BRF30-AA-?EN-HAS2 USPP 1336FBRF30AAE
ALLEN BRADLEY 1336F-BRF50-AA-?EN NSFP 1336FBRF50AAEN
ALLEN BRADLEY 1336F-BRF100-AA?-EN-HASP-L6 USPP 1336FBRF1
ALLEN BRADLEY 1336F-BRF75-AA-?EN USPP 1336FBRF75AAEN
ALLEN BRADLEY 1336F-BRF20-AA-?EN-HAS2-L6 NSFP 1336FBRF20
Allen Bradley AB 1336F-BRF200 VS Drive MCC Bucket 50A
ALLEN BRADLEY 1336F A010 AE EN 230v 10hp VFD
Enlarge
ALLEN BRADLEY 1336 PLUS II 1336F-BRF75-AA-?EN-GMS6-L4E
ALLEN BRADLEY 1336 PLUS II 1336F-BRF75-AA-?EN-GMS1-L4
ALLEN BRADLEY 1336 PLUS II 1336F-BRF50-AA-?EN-GMS1-L4
Allen Bradley VFD 1336F-BRF100-AA?-EN-HCS2
Allen Bradley 1336plus drive 1336F-BRF100-AE?-EN-HAS2-L5
ALLEN BRADLEY 1336F-BRF50-AN-?EN-L6E DRIVE
One-day shipping available
ALLEN BRADLEY 1336 PLUS II DRIVE 1336F-AQF30-AA-?EN *NEW
One-day shipping available
ALLEN BRADLEY 1336F-CWF10-AN-?EN *NEW*
One-day shipping available
ALLEN BRADLEY 1336F-BRF200-AN?-EN-GMS1 PLUS II DRIVE
ALLEN BRADLEY AC CRIVE 1336F-BRF30-AA-?EN-HAS2-L6
ALLEN BRADLEY 1336F-CWF150-AN?-EN-HAS2
ALLEN BRADLEY 1336F-BRF100-AA?-EN-HAS2-LA4-L4 NSPP 1336F
Allen Bradley AB 1336F-BRF200 VS Drive MCC Bucket 60A
ALLEN BRADLEY 1336F-BRF150-AE?-EN DRIVE 15HP 460V *XLNT*
ALLEN BRADLEY 1336F-BRF50-AN-?EN-GMS5 AC DRIVE 5HP NEW
ALLEN BRADLEY 1336F-BRF50-AN-?EN AC DRIVE 5HP 460V NEW
ALLEN BRADLEY 1336F-BRF30-AA-?EN-4HA2-L6 USPP 1336FBRF30
ALLEN BRADLEY 1336F-BRF50-AN-?EN-HAS2-LA2-LA3?-L6 USPP 13
Allen Bradley 1336F-BRF50-AE-?EN AC Drive 5HP 460V *NIB*
Allen Bradley 1336F-BRF50-AE-?EN AC Drive 5HP 460V USED
ALLEN BRADLEY 1336F-BRF75-AA-?EN-GMS6-L4 USPP 1336FBRF75
Allen Bradley 1336F-BRF200-AA?-EN-HCS2-L9E 20HP AC Drive
Allen Bradley 1336F-BRF200-AA?-EN-HCS2 20HP AC Drive
ALLEN BRADLEY 1336F-BRF30-AA-?EN-GMS5-L4 DRIVE 3HP *NNB*
ALLEN BRADLEY 1336F-BRF10-AA-?EN4-HA1-L6 USPP 1336FBRF10
ALLEN BRADLEY 1336F-BRF07-AA-?EN-HASP-LA2-L5 NSPP 1336FB
ALLEN BRADLEY 1336F-BRF20-AA-?EN-HAS1 USPP 1336FBRF20AAE
ALLEN BRADLEY 1336F-BRF50-AA-?EN USPP 1336FBRF50AAEN
ALLEN BRADLEY 1336F-BRF75-AAE?N-HCS1-L6 USPP 1336FBRF75A
Allen Bradley AB 1336F-BRF100 VS Drive MCC Bucket 30A
Allen Bradley Plus 2 1336F-BRF75-AE-?EN-HAS2-L6 (1894)
ALLEN BRADLEY 1336F-BRF-100-A?A-EN-HASP-L4E USPP 1336FBR
ALLEN BRADLEY 1336F-BRF100-AA?-EN-HAS2-L5 USPP 1336FBRF1
New Allen Bradley AC Drive 1336F-BRF75-AN-?EN-LA #28872
ALLEN BRADLEY 1336F-BRF50-AA-?EN-LA2-LA3 USPP 1336FBRF50
New Allen Bradley 1336F-BRF200-AE 20HP PLUS II DRIVE
Allen Bradley AC Drive 1336F-BRF100-AN?-EN-HAS2-L5
ALLEN BRADLEY 1336F-BRF100-AA?-EN-HASP-L4 USPP 1336FBRF1
Allen Bradley Drive Cat 1336F-BRF200-AN?-EN Used
ALLEN BRADLEY 1336F-BRF-50-AN?-EN USPP 1336FBRF50ANEN
ALLEN BRADLEY 1336F-BRF20-AA-?EN-L5 USPP 1336FBRF20AAENL
ALLEN BRADLEY 1336F-BRF10-AA-?EN-HAS2-L9E USPP 1336FBRF1
ALLEN BRADLEY 1336F-BRF30-AA-?EN USPP 1336FBRF30AAEN
ALLEN BRADLEY 1336F-BRF30-AE-?EN USPP 1336FBRF30AEEN
ALLEN BRADLEY 1336F-BRF100-AA?-EN AC DRIVE 10HP NNB!
NEW Allen Bradley 1336F-BRF50-AA-?EN Impact AC Drive
Allen Bradley 1336F-BRF75-AA-?EN 7.5HP AC Drive **NIB**
Allen Bradley 1336F-BRF75-AA-?EN-GMS1-L4 AC Drive NIB
Allen-Bradley 1336F PLUS II AC Drive (15 HP)
ALLEN BRADLEY 1336F-BRF10-AA-?EN-HCS2-L6 USPP 1336FBRF10
Allen Bradley 1336F-BRF50-AA-?EN | AC Drive 5Hp *NIB*
ALLEN BRADLEY 1336F-BRF05-AA-?EN-HASB-L6 USPP 1336FBRF05
5668 Allen-Bradley 1336F-BRF100-AA?-EN Motor Controller
ALLEN BRADLEY 1336F-BRF20-AA-?EN-GMS5-L4 DRIVE 2HP *NNB*
ALLEN BRADLEY 1336F-BRF20-AA-?EN-HASP/B DRIVE 2HP *NNB*
ALLEN BRADLEY 1336F-BRF50-AA-?EN-HAS2-L4 USPP 1336FBRF50
ALLEN BRADLEY 1336F-BRF20-AN-?EN-GMS1 NSPP 1336FBRF20ANE
ALLEN BRADLEY 1336F-BRF30-AN-?EN-GMS1 DRIVE 480VAC 3HP
ALLEN BRADLEY 1336F-BRF100-AE?-EN-HAS2-L5 7.5HP AC DRIVE
ALLEN BRADLEY 1336F-BRF50-AA-?EN-HCS2-L6E USPP 1336FBRF5
ALLEN BRADLEY 1336F-BRF30-AN-?EN USPP 1336FBRF30ANEN
ALLEN BRADLEY 1336F-BRF20-AA-?EN USPP 1336FBRF20AAEN
ALLEN BRADLEY 1336F-BRF20-AE-?EN USPP 1336FBRF20AEEN
ALLEN BRADLEY 1336F-BRF05-AA-?EN-GMS5-L4 DRIVE .5HP *NNB
Allen Bradley 1336F-BRF15-AE-?EN AC Drive 1.5 HP *NIB
ALLEN BRADLEY, 1336F-BRF-50-AN?-EN, 5HP DRIVE
ALLEN BRADLEY 1336F-BRF50-AA-??EN or AE-EN PLUS II – NEW
ALLEN BRADLEY 1336F-BRF-07AA-?EN-HCS2 USPP 1336FBRF07AAE
ALLEN BRADLEY 1336F-BRF15-AA-?EN USPP 1336FBRF15AAEN
ALLEN BRADLEY 1336F-BRF30-AN-?EN DRIVE 480VAC 3HP
ALLEN BRADLEY 1336F-BRF20-AN-?EN-GMS1 USPP 1336FBRF20ANE
ALLEN BRADLEY 1336F-BRF20-AN-?EN-GMS1 DRIVE 480VAC 2HP
ALLEN BRADLEY 1336F-BRF100-AN?-EN USPP 1336FBRF100ANEN
ALLEN BRADLEY 1336F-BRF10-AA-?EN USPP 1336FBRF10AAEN
ALLEN BRADLEY 1336F-BRF10-AE-?EN USPP 1336FBRF10AEEN
PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅
15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實(shí)力庫存商家