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描述

(三)電源的選擇

PLC的供電電源,除了引進(jìn)設(shè)備時(shí)同時(shí)引進(jìn)PLC應(yīng)根據(jù)產(chǎn)品說明書要求設(shè)計(jì)和選用外,一般PLC的供電電源應(yīng)設(shè)計(jì)選用220VAC電源,與國內(nèi)電網(wǎng)電壓一致。重要的應(yīng)用場合,應(yīng)采用不間斷電源或穩(wěn)壓電源供電。

如果PLC本身帶有可使用電源時(shí),應(yīng)核對(duì)提供的電流是否滿足應(yīng)用要求,否則應(yīng)設(shè)計(jì)外接供電電源。為防止外部高壓電源因誤操作而引入PLC,對(duì)輸入和輸出信號(hào)的隔離是必要的,有時(shí)也可采用簡單的二極管或熔絲管隔離。

(四)存儲(chǔ)器的選擇

由于計(jì)算機(jī)集成芯片技術(shù)的發(fā)展,存儲(chǔ)器的價(jià)格已下降,因此,為保證應(yīng)用項(xiàng)目的正常投運(yùn),一般要求PLC的存儲(chǔ)器容量,按256個(gè)I/O點(diǎn)至少選8K存儲(chǔ)器選擇。需要復(fù)雜控制功能時(shí),應(yīng)選擇容量更大,檔次更高的存儲(chǔ)器。

(五)冗余功能的選擇

1.控制單元的冗余

(1)重要的過程單元:CPU(包括存儲(chǔ)器)及電源均應(yīng)1B1冗余。

(2)在需要時(shí)也可選用PLC硬件與熱備軟件構(gòu)成的熱備冗余系統(tǒng)、2重化或3重化冗余容錯(cuò)系統(tǒng)等。

2.I/O接口單元的冗余

(1)控制回路的多點(diǎn)I/O卡應(yīng)冗余配置。

(2)重要檢測點(diǎn)的多點(diǎn)I/O卡可冗余配置。3)根據(jù)需要對(duì)重要的I/O信號(hào),可選用2重化或3重化的I/O接口單元。

(六)經(jīng)濟(jì)性的考慮

選擇PLC時(shí),應(yīng)考慮性能價(jià)格比??紤]經(jīng)濟(jì)性時(shí),應(yīng)同時(shí)考慮應(yīng)用的可擴(kuò)展性、可操作性、投入產(chǎn)出比等因素,進(jìn)行比較和兼顧,最終選出較滿意的產(chǎn)品。

輸入輸出點(diǎn)數(shù)對(duì)價(jià)格有直接影響。每增加一塊輸入輸出卡件就需增加一定的費(fèi)用。當(dāng)點(diǎn)數(shù)增加到某一數(shù)值后,相應(yīng)的存儲(chǔ)器容量、機(jī)架、母板等也要相應(yīng)增加,因此,點(diǎn)數(shù)的增加對(duì)CPU選用、存儲(chǔ)器容量、控制功能范圍等選擇都有影響。在估算和選用時(shí)應(yīng)充分考慮,使整個(gè)控制系統(tǒng)有較合理的性能價(jià)格比。

可根據(jù)應(yīng)用要求,合理選用智能型輸入輸出模塊,以便提高控制水平和降低應(yīng)用成本。

考慮是否需要擴(kuò)展機(jī)架或遠(yuǎn)程I/O機(jī)架等

歐美品牌停產(chǎn)的,常用的“PLC”備品備件

我司產(chǎn)品應(yīng)用于以下領(lǐng)域:

1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》

2,《智能平鋼化爐系統(tǒng)制造》

3,《PLC可編程輸送控制系統(tǒng)》

4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》

6,《化工廠藥液恒流量計(jì)算機(jī)控制系統(tǒng)》

7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動(dòng)化控制系列

本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

ADVANCED ENERGY ENI DCG-200 PLASMA GENERATOR 20kW#6

Advanced Energy Inverter Focus,AE 3000-000

AE Advanced Energy 12cm MCIS Multi-Cell Ion source gun

Advanced Energy RFG1250 Halo,6000-00467,3155027-010

AE Advanced Energy 94cm Linear Ion Beam Source LIS 84cm

Advanced Energy Circuit Board 1302149 1302149D

DC GENERATOR ADVANCED ENERGY PINNACLE 3152415-107K

Advanced Energy Magnetron MDX-10K Master,2012-041-AB

Advanced Energy Focus High Voltage AE 3006-000

Advanced Energy 3151802-001 AE Rapid-O Toroidal Plasma

ADVANCED ENERGY 3150301-002 CONTROLLER W LINE CORD

ADVANCED ENERGY ENI DCG-200 PLASMA GENERATOR 20kW#1

Advanced Energy PDX 500

AE Advanced Energy Apex 7 10kW Gen.Manual 5708010-D

ADVANCED ENERGY ENI DCG-200 PLASMA GENERATOR 20kW#3

ADVANCED ENERGY ENI DCG-200 PLASMA GENERATOR 20kW#2

Advanced Energy Ovation 35162 3150861 AMAT:0190-16109

AE Advanced Energy MDX-L6

ADVANCED ENERGY ENI DCG-200 PLASMA GENERATOR 20KMASTER

ADVANCED ENERGY ENI DCG-200 PLASMA GENERATOR 20kW#4

Advanced Energy 3151801-001 Remote Plasma Source Rapid

ADVANCED ENERGY ENI DCG-200 PLASMA GENERATOR 20K MASTER

Advanced Energy Verteq AE-6023-0000

ADVANCED ENERGY ENI DCG-200 PLASMA GENERATOR 20kW#5

Advanced Energy Apex 3013 RF Plasma Generator 3kW AE

Advanced Energy RFPP AM-10 Automatch Network 8400003010

DC GENERATOR ADVANCED ENERGY PINNACLE 3152415-107A

ADVANCED ENERGY MDX II 3152264-000 CONTROL UNIT NEW

AMAT 0920-01041 ADVANCED ENERGY RF GNRTR RFG 2000-2V

Advanced Energy 3152194-043 A

Advanced Energy Veeco FSJ4-50B 32’Cable DIN 1340186

ADVANCED ENERGY MDX MAGNETRON DRIVE#MDX20K-MRC

ADVANCED ENERGY MAGNETRON DRIVE MDX-5K-PARTS/REPAIR

Advanced Energy AZX63 RF Match 3155031-014 AMAT

DC GENERATOR ADVANCED ENERGY PINNACLE 3152415-107J

ADVANCED ENERGY MAGNETRON DRIVE#2194-008-01

ADVANCED ENERGY MAGNETRON DRIVE-SLAVE-#3152194-00

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ADVANCED ENERGY MAGNETRON DRIVE-SLAVE-#2194-008-B

HYDROXYCUT ADVANCED THERMOGENIC LEMONADE ENERGY BOOST

AE ADVANCED ENERGY 3152412-218 MDX PINNACLE 6kW

TESLA TACHYON PENDANT ADVANCED STRENGTHEN ENERGY SHIELD

ADVANCED ENERGY MATCH,RF FIXED 3155054-003B

AE ADVANCED ENERGY PLASMA 3151802-0030 AMAT 0920-0008

AE,ADVANCED ENERGY PDX 1250 PLASMA POWER RF GENERATOR

AE Advanced Energy MDX 500 500W Power Supply

Advanced Energy RFG 3000 3155038-000 E Power supply

NEW Advanced Energy Navigator RF MATCH 3155132-001 D

Advanced Energy MDX 500 M/N 3152261-000F Power Supply

Advanced Energy RFG 1250 RF Generator AE 3155027-000 S

ADVANCED ENERGY PE-1000 PLASMA POWER RF GENERATOR

Advanced Energy MDX 500 Power Supply Warranty Mint

ADVANCED ENERGY PDX 2500 RF SOURCE

AE ADVANCED ENERGY MDX PINNACLE 3152326-100B 6kW SUPPLY

AE ADVANCED ENERGY RF MATCH 3155031-037 NAVIGATOR AMAT

ADVANCED ENERGY Navigator RF Bias Match 3155126-008A

Advanced Energy MDX 20kW/10kW DC Generator/Power Supply

AE ADVANCED ENERGY MDX PINNACLE 3152353-011B Pwr SUPPLY

MDX 1K DC Advanced Energy Power Supply for sputtering

ADVANCED ENERGY PE-2500 GEN,RF1500W100KHZ 3157504-012C

Advanced Energy RFX-600 RF Generator S/N:72806

AE,ADVANCED ENERGY PE-5000 PLASMA POWER RF GENERATOR

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Advanced Energy Ideas 1 lot of 5 Light Fixtures

Advanced Energy MDX-L12-650-ONE-YEAR Warranty

AE Advanced Energy RFG 1251 RF Generator 3155107-001 B

Advanced Energy MDX-II 15K

Advanced Energy MDX-II 30K

Advanced Energy RFX-600 RF Generator S/N:150353

ADVANCED SOLAR ENERGY&WIRING APPLICATIONS MANUAL

ADVANCED ENERGY MDX-10K and MDX-20K,lots of 16,used

AE ADVANCED ENERGY RF MATCH 3155031-037 NAVIGATOR AMAT

Advanced Energy RFG-2000-2V-ONE-YEAR Warranty

ADVANCED ENERGY POWER SUPPLY,BESC 1000VDC 1303125 E

Advanced Energy PEP-2500

Advanced Energy FixedMatch RF Match 3155077-001A AMAT

4 used AE Advanced Energy HFV 8000 RF

Advanced Energy MDX 5KW DC Power Supply

Advanced Energy MDX-20K Delta Master 20K 3152194-013 AE

Advanced Energy(AE)3152012-002W MDX Magnatron Drive

ADVANCED ENERGY PDW 2200 AE 3156011 Lam 853-015516-002

ADVANCED ENERGY RFG-1250 HALO

AE Advanced Energy MDX 1.5K Power Supply 3152164-000 K

ADVANCED ENERGY MDX 500 MDX500 POWER SUPPLY DC 3152384

AE Advanced Energy ATN 500 RF Match Network Auto Tuner

Advanced Energy RF Match Assembly#31555094-003

ADVANCED ENERGY MDX 5K DC Power Supply

Advanced Energy PDW-2200-ONE-YEAR Warranty

AE Advanced Energy Pinnacle 6kW Manual 5702195-B

Advanced Energy RFX-600 RF Generator 120VOLT INC CABLES

Advanced Energy AE PDW-600 Low Freq RF Generator

Advanced Energy AE 3155039-000A TCM

AE Advanced Energy MDX-20K Master 3152223-003-Y,used


我們的優(yōu)勢
公司銷售的進(jìn)口備件從國外生產(chǎn)廠家直接進(jìn)貨,
實(shí)行扁平化的銷售模式,給客戶節(jié)約了時(shí)間和成本。
我們的目標(biāo)就是國內(nèi)用戶采購國外備件遇到困難和疑難時(shí)都能找到我們。
我們能夠及時(shí)地報(bào)出優(yōu)惠的價(jià)格和迅捷的交貨期;國內(nèi)用戶采購國外備件受到獨(dú)家代理壟斷價(jià)格時(shí),我們會(huì)給用戶提供一個(gè)比較的機(jī)會(huì),并且為客戶提供=的解決方案。由于我們的訂單集中,訂貨量大,因此我們能提供頗具競爭力的價(jià)格并能夠迅速交貨,我們長期以來致力于解決國內(nèi)用戶采購國外備件中的疑難問題,并為廣大用戶提供電氣及工控自動(dòng)化成套設(shè)備的購銷、現(xiàn)場調(diào)試等全面周到的服務(wù)。

選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點(diǎn)經(jīng)驗(yàn)。
1、先通讀一遍“系統(tǒng)手冊(cè)”(不管能不能看懂,先了解個(gè)大概,以便學(xué)習(xí)編程時(shí)查找);
2、由位控邏輯入手,逐漸增加定時(shí)、計(jì)數(shù)等條件,把或、與、非關(guān)系理順;
3、進(jìn)而練習(xí)整數(shù)運(yùn)算、實(shí)數(shù)運(yùn)算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個(gè)物理回路驗(yàn)證,比如變頻器+電機(jī)+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時(shí)也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機(jī)器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動(dòng)器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學(xué)會(huì)一種至于其它的學(xué)習(xí)起來也就簡單了。