點(diǎn)數(shù)估算
I/O點(diǎn)數(shù)估算時(shí)應(yīng)考慮適當(dāng)?shù)挠嗔浚ǔ８鶕?jù)統(tǒng)計(jì)的輸入輸出點(diǎn)數(shù)，再增加10%～20%的可擴(kuò)展余量后，作為輸入輸出點(diǎn)數(shù)估算數(shù)據(jù)。實(shí)際訂貨時(shí)，還需根據(jù)制造廠商可編程邏輯控制器的產(chǎn)品特點(diǎn)，對(duì)輸入輸出點(diǎn)數(shù)進(jìn)行圓整。
[5]
存儲(chǔ)器容量
存儲(chǔ)器容量是可編程序控制器本身能提供的硬件存儲(chǔ)單元大小，程序容量是存儲(chǔ)器中用戶應(yīng)用項(xiàng)目使用的存儲(chǔ)單元的大小，因此程序容量小于存儲(chǔ)器容量。設(shè)計(jì)階段，由于用戶應(yīng)用程序還未編制，因此，程序容量在設(shè)計(jì)階段是未知的，需在程序調(diào)試之后才知道。為了設(shè)計(jì)選型時(shí)能對(duì)程序容量有一定估算，通常采用存儲(chǔ)器容量的估算來(lái)替代。
[5]
存儲(chǔ)器內(nèi)存容量的估算沒(méi)有固定的公式，許多文獻(xiàn)資料中給出了不同公式，大體上都是按數(shù)字量I/O點(diǎn)數(shù)的10～15倍，加上模擬I/O點(diǎn)數(shù)的100倍，以此數(shù)為內(nèi)存的總字?jǐn)?shù)（16位為一個(gè)字），另外再按此數(shù)的25%考慮余量。
開環(huán)控制
開關(guān)量的開環(huán)控制是PLC的最基本控制功能。PLC的指令系統(tǒng)具有強(qiáng)大的
邏輯運(yùn)算能力，很容易實(shí)現(xiàn)定時(shí)、計(jì)數(shù)、順序(步進(jìn))等各種邏輯控制方式。大部分PLC就是用來(lái)取代傳統(tǒng)的繼電接觸器控制系統(tǒng)。
[9]
模擬量閉環(huán)
對(duì)于模擬量的閉環(huán)控制系統(tǒng)，除了要有開關(guān)量的輸入輸出外，還要有模擬量的輸入輸出點(diǎn)，以便采樣輸入和調(diào)節(jié)輸出實(shí)現(xiàn)對(duì)溫度、
流量、壓力、位移、速度等參數(shù)的連續(xù)調(diào)節(jié)與控制。目前的PLC不但大型、中型機(jī)具有這種功能外，還有些小型機(jī)也具有這種功能。
[9]
數(shù)字量控制
控制系統(tǒng)具有旋轉(zhuǎn)編碼器和脈沖伺服裝置(如
步進(jìn)電動(dòng)機(jī))時(shí)，可利用PLC實(shí)現(xiàn)接收和輸出高速脈沖的功能，實(shí)現(xiàn)數(shù)字量控制，較為先進(jìn)的PLC還專門開發(fā)了數(shù)字控制模塊，可實(shí)現(xiàn)曲線插補(bǔ)功能，近來(lái)又推出了新型運(yùn)動(dòng)單元模塊，還能提供數(shù)字量控制技術(shù)的編程語(yǔ)言，使PLC實(shí)現(xiàn)數(shù)字量控制更加簡(jiǎn)單。
[9]
數(shù)據(jù)采集監(jiān)控
由于PLC主要用于現(xiàn)場(chǎng)控制，所以采集現(xiàn)場(chǎng)數(shù)據(jù)是十分必要的功能，在此基礎(chǔ)上將PLC與上位計(jì)算機(jī)或觸摸屏相連接，既可以觀察這些數(shù)據(jù)的當(dāng)前值，又能及時(shí)進(jìn)行統(tǒng)計(jì)分析，有的PLC具有數(shù)據(jù)記錄單元，可以用一般個(gè)人電腦的存儲(chǔ)卡插入到該單元中保存采集到的數(shù)據(jù)。PLC的另一個(gè)特點(diǎn)是自檢信號(hào)多．利用這個(gè)特點(diǎn)，PLC控制系統(tǒng)可以實(shí)現(xiàn)白診斷式監(jiān)控，減少系統(tǒng)的故障，提高系統(tǒng)的可靠性。
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*所有備件的質(zhì)保期均為1年，經(jīng)過(guò)專業(yè)測(cè)試認(rèn)證。
*如果您需要訂購(gòu)產(chǎn)品超過(guò)1件，請(qǐng)與我們聯(lián)系，我們可以為您提供折扣。
*我們僅采用快遞方式遞送備件。（順豐）
*如果您發(fā)現(xiàn)其他供貨商為相同產(chǎn)品提供更為低廉的價(jià)格，我們也愿意參照其價(jià)格向您提供進(jìn)一步的折扣。如果還有其他任何問(wèn)題，請(qǐng)隨時(shí)與我們聯(lián)系。
*請(qǐng)讓我們知道您有任何，備品，備件，的需要，我們可以給您進(jìn)一步的援助，我們等候您的詢盤。
Matrox MXO2 PCIe host adapter for use with PC
Matrox MXO2 ExpressCard/34 host adapter for Laptop
Matrox G200 Quad with pal-TV Tuner Europe NEW 25P2724
Dell Matrox 10-100 Quad PCI NS-FNIC/4/NA Card 355FE
Matrox Millennium P650 LP 64MB PCI Card P65-MDDAP64
IBM matrox GXT135P GRAPHICS PCI ADAPTER 00P2530
NEW Matrox G450 PCI (FACTORY SEALED)
NEW Matrox Matrox G450 Low Profile LP (FACTORY SEALED)
[74627] Matrox Cable CAB-L60-4XAF Quad-moniter Upgrade Cable (Analog) RoHS
Matrox Millennium G550 PCIe 1x 32MB Dual DVI Graphics Card G55-MDDE32 (NEW)
Hp 171975-001 Matrox Millennium G200 Quad Mms Video Card
Matrox 7003-0301 Video Card G450 32mb Dual Outputs
Matrox TripleHead2Go Digital Edition Graphics Expansion Module T2G-D3D-IF
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Matrox G450 video card 32MB DDR RAM Dual HD-15 VGA AGP4x ATX 3.3V G45FMDHA32DBF
Matrox DualHead2Go Digital Edition Graphics Expansion Module VGA - 2 DVI-I 43633
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Matrox DBHD44-TO-13BNC for Matrox Orion or Meteor 2
NEW Matrox G550 G55+MDHA32DSF (FACTORY SEALED)
New OEM Matrox P690 Plus 256MB P69-MDDE256LAUF DDR2 PCIe Video Card Dell P171C
Matrox Quad-TV Adapter Upgrade Cable 1 X60-pin LFH Male, 4x 15-pin HD-15 Female
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MATROX MGA-MIL/2/HP5 2MB VIDEO CARD.
COMPAQ 401226-001 MATROX PRODUCTIVA G100 MULTI-MONITOR.
MATROX VIDEO CARD G45FMDVP32DSF MATROX G450 PCI 4X
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Matrox Graphics P69-MDDE256LAUF P690 LP PCI-Express Standart Bracket
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Matrox G2+QUADP-PL-9 Millennium G200 Mms Quad - Graphics Adapter - Mga G200 - 32
Matrox G2+/MILA/8BN/20 Matrox G200mm 32mb Quad W/tv Video Card
[108501] Matrox Cable CAB-L60-2XDF 1-foot LFH60-to-DVI Dual-Monitor Adapter
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128MB Matrox Qid DDR ATX bracket33/66MHz PCI QID-P128LPAF
TEST LISTING Matrox Millennium G550 Low-profile - graphics adapter - MGA G550 -
DO NOT PURCHASE
MATROX QID PRO
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Matrox MGA-MIL/2/G2 29596-A 576-05 Graphics VGA DVI PCI Video Card
Matrox Graphics Matrox M9148 M9148-E1024LAF M9148E1024LAF
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Hewlett Packard Matrox Millenium MGA (4 MB) PCI Video
Meteor Pro Matrox 690-1 Rev:C Video Frame Grabber Board
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IBM Matrox Multi-Monitor PCI G2 Quad Video Card 22P6687
Matrox G200 MMS QUAD 32MB PCI Card Only G2+QUADPOE9
MATROX G45FMDVP32DB *NEW*
METEOR2-MC/4 MATROX METEOR2 30 DAY WARRANTY
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MATROX PULSAR/DIG/MCD 587-00 REV:A
Matrox RTX 100 - Board
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MATROX MGI PH-E128APVF 128MB DDR PCIe Video Card
Matrox Odyssey Backplane Link Port Interconnect Board
Matrox TripleHead2Go Triple VGA Screen Video Expansion Adapter T2G-A3AF
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Matrox Mini Express 34 Card for Laptop Computers
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NEW Matrox QID-E128LPAF Low Profile Quad Output 128Mb Graphic Card PCIE x16
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Matrox Mini PCIe Card for Desktop Computers
Matrox Graphics G550, #G55MADDA32DSF GRAPHIC CARD - 32MB
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MATROX G2+/MSDP/8BN/20 PCI 8MB VIDEO CARD.
844-00 MATROX Vga Video Card Gx1
Matrox G55-MDDE32F Matrox Millenium G550 Pcie 1x Video Card
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Lot of 20 Matrox G550 Low-Profile 32MB PCI Dual Video G55MDDAP32DBF F7011-0001
COMPAQ-402543-001-MATROX MILLENNIUM G200 ATX VIDEO CARD
IBM 80P6408 Matrox G450 PCI DVI-VGA Video Card 80P6411
NEW Matrox G450 (FACTORY SEALED)
MATROX GRAPHICS L60-2XDF 1-FOOT Video Splitte CABLE LFH60-2XTVF VIDEO/S-VIDEO
Matrox G450 128MB MMS Quad View Monitors DVI PCI Win7 Video Card + Cbl & Driver
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Matrox G450 128MB Multi-Monitor Series Quad View Desktop PCI Video Card + Cable
Matrox Dual Head 2 Go DualHead2Go Analog Edition Dual Monitor Dongle
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Matrox G45FMDVP32DBF Board Video G450 32mb Pci Dual Head
MATROX QID DVI 128MB ATX QUAD VIEW MONITOR XP WIN7 PCI VIDEO CARD + CABLE/DRV CD
MATROX 895-04 A CARD
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NEW Matrox G200 Quad Monitor 32MB PCI Video Card G2+/QUADP-PL DVI or VGA Cables
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MATROX P69-MDDP256LAUF MILLENIUM P690 PLUS 256MB LP PCI
MATROX MGA-MIL/4/DELL3 8MB PCI VIDEO CARD.
MATROX VCD001394-00 AGP VIDEO CARD.
Matrox G450 G45X4QUAD-B MMS 4 Monitors PCI VIDEO CARD 128 MB DDR cables DVI VGA
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Matrox P65-MDDAP128UF Matrox.Video Card 128 MB Video Memory DDR SDRAM Peripheral
MATROX 1981 RGB-GRAPH 167-D06-7 7559 MLOA-6 2492- CARD
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Matrox F7229-00 Matrox.Video Card 32 MB Video Memory Dual Display Capable
MATROX QID 128MB QUAD DISPALY DVI VGA LOW PROFILE SFF XP WIN7 PCI VIDEO CARD
Matrox MOR/2VD/J2K Video Card
Matrox MGA-MIL/4 590-05 RevB IS-MGA-2064-R2 PCI Video
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HEWLETT PACKARD 5064-9194 MATROX G4+ 16MB VIDEO CARD
Matrox G55MADDA320E9 Matrox G55 Agp Graphics Card 32mb
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HP VECTRA MATROX G100 4MB AGP BOARD D6550-69501
Returns: Not accepted
MATROX MGA G100 4MB AGP GRAPHICS CARD 5064-6048
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Matrox RTMac Video Capture & Editing Station for Apple G4
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MATROX G2+/MSDP/8BN/20 PCI 8MB VIDEO CARD
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Matrox MIL2P/4G PCI VGA Video/ Graphics Card
Returns: Not accepted
Matrox MGA-MIL/MAC8N Millennium II For Mac PCI Video Card
lot of 13 Matrox 32MB PCI Video Card SFF
Matrox Epica 64MB Dual PCI Video Card EPI-TC2P64LPAF
Hp G45MDVP32DB Matrox Millenium G450 Pci 32mb Dual Head (vga & Dvi)
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NEW MATROX G550 LP PCIe VIDEOCARD G55-MDDE32LPDF NR836
GR A Matrox P69-MDDP256LAUF Video Card P690 Plus 256 PCI DVI LP
MATROX 576-04 4MB PCI VIDEO CARD. OEM
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Matrox G200 Multi-Monitor PCi Quad Card G2-QUADP-PL
MATROX 16551-822 64-BIT GRAPHICS CARD.
Matrox Graphics Matrox Parhelia-512 PH-A8X128
Returns: Not accepted
Matrox RT 2000
Returns: Not accepted
MATROX G2+/QUADP-PL G200 QUAD 32MB PCI WITH CABLES
MATROX 7025-02; VIDEO EDITING CARD , ATTACHED TO MATROX 971-0302
Returns: Not accepted
Set of 3 Matrox Parhelia APVe F15953-02+F160113-00+F15963
Set of 3 Matrox Parhelia APVe F15953-02+F160113-00+F15941-00+F16125-00
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Lot of 7*Matrox 644-03 Rev. A MY220P Video Card PCI VGA
Matrox P69-MDDE128F Millennium P690 16x PCI-e 128MB Video Graphics Card TESTED
MATROX CAB-L60-2XD6F 2X DVI Dual Monitor Cable FOR G55MADDA32DB CAB-L60-2XD6F
MATROX (P69-MDDP128F) MILLENIUM P690 128MB PCI
Returns: Not accepted
IBM G2/MILA/8/IBM MATROX G200 8MB AGP VIDEO CARD
MATROX- G2+/MSDP/8B/20- MILLENNIUM G200- VIDEO CARD NEW
MATROX-844-00- G200 ATX GRAPHICS CONTROLLER CARD
MATROX-G2+/MILA/8D/CPQ/-G200 8MB AGP VIDEO CARD
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Matrox G45FMDVP32DB Matrox G450 Dual Head Pci 32mb Vga-dvi Video Card G45fmdvp32
Matrox G4&MMDH4A32G AGP Video Card Millennium G400 MAX DH Dual
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Compaq 294818-001 Sps-bd Graphic Bd Matrox G450 350mhz Ramdac 32mb
Matrox Dual VGA MGI-D2G-A2A-IF adaptor
Returns: Not accepted
Enlarge
MATROX 908-09 G2+QUADP-PL-9 32MB VIDEO CARD
MATROX-MIL2P/8/DELL2- 8MB 64BIT PCI GRAPHICS CARD
Matrox TJ-373 Controller of Tension & Temperature
Matrox Graphics Millennium G550 32MB PCIe Graphics Card RoHS PC Computer Video
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Matrox DigiConnect Video DLE/DCT/VID Digisuite Video Breakout box
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