VME172PA652SE

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描述

VME172PA652SE

中央處理單元(CPU)是可編程邏輯控制器的控制中樞。它按照可編程邏輯控制器系統(tǒng)程序賦予的功能接收并存儲從編程器鍵入的用戶程序和數(shù)據(jù);檢查電源、存儲器、I/O以及警戒定時器的狀態(tài),并能診斷用戶程序中的語法錯誤。當(dāng)可編程邏輯控制器投入運(yùn)行時,首先它以掃描的方式接收現(xiàn)場各輸入裝置的狀態(tài)和數(shù)據(jù),并分別存入I/O映象區(qū),然后從用戶程序存儲器中逐條讀取用戶程序,經(jīng)過命令解釋后按指令的規(guī)定執(zhí)行邏輯或算數(shù)運(yùn)算的結(jié)果送入I/O映象區(qū)或數(shù)據(jù)寄存器內(nèi)。等所有的用戶程序執(zhí)行完畢之后,最后將I/O映象區(qū)的各輸出狀態(tài)或輸出寄存器內(nèi)的數(shù)據(jù)傳送到相應(yīng)的輸出裝置,如此循環(huán)運(yùn)行,直到停止運(yùn)行。為了進(jìn)一步提高可編程邏輯控制器的可靠性,近年來對大型可編程邏輯控制器還采用雙CPU構(gòu)成冗余系統(tǒng),或采用三CPU的表決式系統(tǒng)。這樣,即使某個CPU出現(xiàn)故障,整個系統(tǒng)仍能正常運(yùn)行。在輸入采樣階段,可編程邏輯控制器以掃描方式依次地讀入所有輸入狀態(tài)和數(shù)據(jù),并將它們存入I/O映象區(qū)中的相應(yīng)的單元內(nèi)。輸入采樣結(jié)束后,轉(zhuǎn)入用戶程序執(zhí)行和輸出刷新階段。在這兩個階段中,即使輸入狀態(tài)和數(shù)據(jù)發(fā)生變化,I/O映象區(qū)中的相應(yīng)單元的狀態(tài)和數(shù)據(jù)也不會改變。因此,如果輸入是脈沖信號,則該脈沖信號的寬度必須大于一個掃描周期,才能保證在任何情況下,該輸入均能被讀入。

在用戶程序執(zhí)行階段,可編程邏輯控制器總是按由上而下的順序依次地掃描用戶程序(梯形圖)。在掃描每一條梯形圖時,又總是先掃描梯形圖左邊的由各觸點(diǎn)構(gòu)成的控制線路,并按先左后右、先上后下的順序?qū)τ捎|點(diǎn)構(gòu)成的控制線路進(jìn)行邏輯運(yùn)算,然后根據(jù)邏輯運(yùn)算的結(jié)果,刷新該邏輯線圈在系統(tǒng)RAM存儲區(qū)中對應(yīng)位的狀態(tài);或者刷新該輸出線圈在I/O映象區(qū)中對應(yīng)位的狀態(tài);或者確定是否要執(zhí)行該梯形圖所規(guī)定的特殊功能指令。
即,在用戶程序執(zhí)行過程中,只有輸入點(diǎn)在I/O映象區(qū)內(nèi)的狀態(tài)和數(shù)據(jù)不會發(fā)生變化,而其他輸出點(diǎn)和軟設(shè)備在I/O映象區(qū)或系統(tǒng)RAM存儲區(qū)內(nèi)的狀態(tài)和數(shù)據(jù)都有可能發(fā)生變化,而且排在上面的梯形圖,其程序執(zhí)行結(jié)果會對排在下面的凡是用到這些線圈或數(shù)據(jù)的梯形圖起作用;相反,排在下面的梯形圖,其被刷新的邏輯線圈的狀態(tài)或數(shù)據(jù)只能到下一個掃描周期才能對排在其上面的程序起作用。
在程序執(zhí)行的過程中如果使用立即I/O指令則可以直接存取I/O點(diǎn)。即使用I/O指令的話,輸入過程影像寄存器的值不會被更新,程序直接從I/O模塊取值,輸出過程影像寄存器會被立即更新,這跟立即輸入有些區(qū)別。

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保?證?安全準(zhǔn)時發(fā)貨,
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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
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RDC 3000439 000 / 3000 439 000

RDC 863.00.00.00_D / 863 00 00 00_D

YASKAWA CIMR-XCAA21P5 VS mini DRIVE

FUJI ELECTRIC FVR E11 FVRO. 75E11S-4EN 3PHASE O.75KW

ALVARION SU-RA-HP-2.4 824714 W/ SU-NI-1D-HP-2.4 824702

JOHNSON CONTROLS METASYS DX-9100-8454 PLC

MOTOROLA CPTM-04 01-W3764F 01B NORTEL NTAR02NX

VIVID 1104-10003-00-E?0 4004-10002-00 & 10001-00

Intraserver 3X-DEPVZ-AA Combo Card LVD 10/100

NORTEL PASSPORT 8010CO BREAKER INTERFACE PANEL 8010

CISCO VCO/4K INTERFACE CONTORLLER CARD VCO-ICC NEW

OMRON C200H CPU01 PROGRAMMABLE CONTROLLER+16KB MEMORY

DOUBLE COLUMN 12″ ELECTRONIC DIGITAL HEIGHT GAUGE

OR-X MODEL 402 ARBITRARY SWEEP PROGRAMMABLE GENERATOR

SUN COMPLIANCE MODEL SBD1F MODULE 375-3171

METACOMP VMEcomm20 VME MODULE

HP AGILENT 3788A ERROR PERFORMANCE ANALYZER

JENAER ANTRIEBSTECHNIK GmbH ECOLIN 200 MOTOR CONTROLLER

TOLLGRADE DIGITEST DWU 900-0230- REV D W/ 900-0217 A

CONTROL TECHNIQUES COMMANDER SE 11200037 230V

PowerDsine PD-6024 24 Port PoE Midspan PD-6024/AC

DATA GENERAL VSC/3I BLADE VSC-3I 005039452

YASKAWA CIMR-XCAA20P4 VS mini DRIVE SPINDLE

YASKAWA JVOP-121 VS mini 100V SINGLE PHASE 0.4 KW CB

C44550 Nikon VCM Amp 3-Axis Motor Amplifier 4S064-050

KONTRON PEP CP602 CPU BOARD FOR CompactPCI SYSTEM CP600

MATROX Gen/pro 721-0201 GP60/F/64/F/64

PARKER GEMINI GV DIGITAL SERVO DRIVE GV-U6E-NK

PowerDsine 6506 PD-6506/AC/M 6 Port PoE Midspan NEW

MATROX GENESIS PLUS GPG4N/400/128/2 PCI processor board

PowerDsine PD-6024 24 Port PoE Midspan PD-6024/AC/M

SYSTECH HPS BLADE 005037015 HPSX-VME-05B DT3190

SYSTECH DCP BLADE 005037016 DCP-8820 DT9313

APPLIED PRECISION 52-502149-000

Lambda LLS5008 DC Power Supply 0-8V @ 10A

NORTEL NTN380DA OM 3100 REL 4 SHELF PROCESSOR

NMS AG2 DAUGHTERBOARD 5630 REV A2 5630A2186

AVAYA 700397110 MM316 40 POE HDMM

LOT OF 2 ALVARION TDM-IDU-1P 742000

MKS 2179A MASS FLOW CONTROLLER 2179-24801 RANGE 20 SCCM

Hermos transponder reader ASC-I1 TLG-I1-AMAT-R1 TLG-RS2

ANORAD 000-71003824-00 VME BOARD

ANORAD 000-71003821-00 VME BOARD

APPLIED MATERIALS 0100-11001 ANALOG OUTPUT BLADE PWB

ATRICA AT80003 SERIES DC POWER SUPPLY

Natural MicroSystems NMS TX 3210 P/N 5646 REV 6

Yaskawa VS mini V7 CIMR-V7AA21P5 SPEC:21P50

PRO-FACE 2980070-12 GLC2300-TC41-24?V

Juniper RE-333-768-BB RE-333-768-M5 M10 M20 M40 M40e

JUNIPER M10 M5 AC Power Supply PN: 740-002497

APPLIED MATERIALS 0100-76124 DIGITAL I/O BOARD

ESA NSK Y DRIVER LYA2AF5-20

ESA NSK 0 DRIVER J1003AF9-20

Juniper board pn: 710-001948 750-002499 M10 M20 M40

OMRON Z4LC-C28 PARALLEL BEAM LINE SENSOR

PRO-FACE 2980070-12 GLC2300-TC41-24?V

NEC GLS5410B Gas Laser Unit W/ LASER HEAD NO. 1664

Nortel NTRX50CH 01 CPU 604E 512MB NNTM64501S7N

DIAGNOSTIC INSTRUMENTS HRP100-ENG12 X1 LENS

Olympus U-PMTVC C-Mount Video Port PhotoTube Adapter

ULTRAPOINTE COP. PAGE SCANNER CONTROLLER 000134 REV 06

KLA-Tencor CRS1010 Fast Z Controller 001003 PCB

KLA-Tencor CRS1010 PMT Preamp PCB 000276

Granville Phillips 307004 EB DEGAS Controller 540054

NMS 5339 W/ NMS 5268 ISA

NMS 5301 REV 2 ISA

XYCOM DIO 110551 10330-00800 70244-703 Y 1.1E

MOTOROLA RIO II VE00085696 PCB AES-0262 REV 1.20

GENERAL S.C VME-IVO PCB VME IVO REV N/R REV B

MICRO MEMORY MM-6260 MM6260D PN: 92421 64M REV D

MICRO MEMORY MM-6260 MM6260E PN: 92421 64M REV E

MICRO MEMORY MM-6326 MM6326 PN: 92281 16M REV S

專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊

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


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”(不管能不能看懂,先了解個大概,以便學(xué)習(xí)編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(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)會一種至于其它的學(xué)習(xí)起來也就簡單了。