IC698CHS017

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描述

IC698CHS017

工作速度
? ? 工作速度是指PLC的CPU執(zhí)行指令的速度及對急需處理的輸入信號的響應(yīng)速度。工作速度是PLC工作的基礎(chǔ)。速度高了，才可能通過運行程序?qū)崿F(xiàn)控制，才可能不斷擴大控制規(guī)模，才可能發(fā)揮PLC的多種多樣的作用。
? ? PLC的指令是很多的。不同的PLC。指令的條數(shù)也不同。少的幾十條，多的幾百條。指令不同，執(zhí)行的時間也不同。但各種PLC總有一些基本指令，而且各種的PLC都有這些基本指令，故常以執(zhí)行一條基本指令的時間來衡量這個速度。這個時間當(dāng)然越短越好，已從微秒級縮短到零點微秒級。并隨著微處理器技術(shù)的進步，這個時間還在縮短。PLC之家
? ? 執(zhí)行時間短可加快PLC對一般輸入信號的響應(yīng)速度。從討論PLC的工作原理知，從對PLC加入輸入信號，到PLC產(chǎn)生輸出，最理想的情況也要延遲一個PLC運行程序的周期。因為PLC監(jiān)測到輸入信號，經(jīng)運行程序后產(chǎn)生的輸出，才是對輸入信號的響應(yīng)。不理想時，還要多延長一個周期。當(dāng)輸入信號送入PLC時，PLC的輸入刷新正好結(jié)束，就是這種情況。這時，要多等待一個周期，PLC的輸入映射區(qū)才能接受到這個新的輸入信號。對一般的輸入信號，這個延遲雖可以接受，但對急需響應(yīng)的輸入信號，就不能接受了。對急需處理的輸人信號延遲多長時間PLC能予以響應(yīng)，要另作要求。www.PLC100.com
? ? 為了處理急需響應(yīng)的輸入信號，PLC有種種措施。不同的PLC措施也不完全相同，提高響應(yīng)速度的效果也不同。一般的作法是采用輸入中斷，然后再輸出即時刷新，即中斷程序運行后，有關(guān)的輸出點立即刷新，而不等到整個程序運行結(jié)束后再刷新。
? ? 這個效果可從兩個方面來衡量：一是能否對幾個輸入信號作快速響應(yīng)；二是快速響應(yīng)的速度有多快。多數(shù)PLC都可對一個或多個輸入點作快速響應(yīng)，快速響應(yīng)時間僅幾個毫秒。性能高的、大型的PLC響應(yīng)點數(shù)更多。
? ? 工作速度關(guān)系到PLC對輸入信號的響應(yīng)速度，是PLC對系統(tǒng)控制是否及時的前提?？刂撇患皶r，就不可能準(zhǔn)確與可靠，特別是對一些需作快速響應(yīng)的系統(tǒng)。這就是把工作速度作為PLC第一指標(biāo)的原因。

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主營DCS系統(tǒng)配件
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ALLEN BRADLEY 150-B24NBDD-J1 USPP 150B24NBDDJ1

ALLEN BRADLEY 8520-S10 USPP 8520S10

ALLEN BRADLEY 1785-L20C15 USPP 1785L20C15

ELECTRO CRAFT 9101-2161 USPP 91012161

GENERAL ELECTRIC DS200GDPAG1AGC USPP DS200GDPAG1AGC

GENERAL ELECTRIC SKLA36AT1200 USPP SKLA36AT1200

SCHWEITZER ENGINEERING SEL-321 USPP SEL321

ADEPT TECH 10332-48712 USPP 1033248712

INDRAMAT TVM2.1-050-W1-1?15 USPP TVM21050W1115

BENTLY NEVADA 3300/35-11-01-0?1-00-00 USPP 3300351101010

ALLEN BRADLEY 1394-SJT05-C USPP 1394SJT05C

SIEMENS 6ES5-696-3AA21 NSFP 6ES56963AA21

SQUARE D 8538-SFG13V81AF?F4T NSPP 8538SFG13V81AFF?4

GENERAL ELECTRIC 331X232ACG03 USPP 331X232ACG03

HOFFMAN AFM24248SS NSFP AFM24248SS

SIEMENS 6ES5-484-8AB11 USPP 6ES54848AB11

GENERAL ELECTRIC DS3800HRRB1B1A USPP DS3800HRRB1B1A

ASEA BROWN BOVERI 5409351 USPP 5409351

KOOLTRONIC K2A4C4NP28L NSFP K2A4C4NP28L

YASKAWA ELECTRIC CACR-SR30-TZ6SM USPP CACRSR30TZ6SM

CUTLER HAMMER 1785K-PMPS-1700 USPP 1785KPMPS1700

RELIANCE ELECTRIC 76876-34L NSPP 7687634L

YASKAWA ELECTRIC CACR-SR30TZ6SM-?E USPP CACRSR30TZ6SME

ALLEN BRADLEY 1336S-B020-AN-E?N4-L6 USPP 1336SB020ANEN4L

ASEA BROWN BOVERI YT204001-DT USPP YT204001DT

GIDDINGS & LEWIS 502-03963-60R3 USPP 5020396360R3

FANUC A06B-6066-H281 USPP A06B6066H281

LENZE MDFKABS100-22U NSFP MDFKABS10022U

FANUC A02B-0056-C795 USPP A02B0056C795

TELEMECANIQUE TLC6322F212111 NSPP TLC6322F212111

ALLEN BRADLEY 8600-2164M USPP 86002164M

YAMAHA LS2V-350 USPP LS2V350

MODICON PC-E984-480 USPP PCE984480

ALLEN BRADLEY 6600-RMS USPP 6600RMS

ASEA BROWN BOVERI 3HAB2209-1 USPP 3HAB22091

ASEA BROWN BOVERI 3HAB2241-1 USPP 3HAB22411

ALLEN BRADLEY 1336T-MCB-SP1A USPP 1336TMCBSP1A

GENERAL ELECTRIC DS3800HMPJ1A1A USPP DS3800HMPJ1A1A

GENERAL ELECTRIC DS3800HMPJ-1B1D USPP DS3800HMPJ1B1D

ALLEN BRADLEY 1326AB-B740C-21 USPP 1326ABB740C21

MODICON MH-DA1056N00 USPP MHDA1056N00

EDWARDS VACUUM A373-15-903 USPP A37315903

HITACHI POSIT-H NSFP POSITH

SIEMENS S42024-C3016-A1 USPP S42024C3016A1

STROMBERG SAFT-163-IOC NSFP SAFT163IOC

YASKAWA ELECTRIC DDSCR-GL60H3 USPP DDSCRGL60H3

FANUC A05B-2301-C300 USPP A05B2301C300

FANUC A05B-2301-C302 USPP A05B2301C302

OMRON CVM1-CPU21-EV2 USPP CVM1CPU21EV2

GE FUJI 6KP1123040X9B1 NSFP 6KP1123040X9B1

YASKAWA ELECTRIC USADED-45-YR14 NSFP USADED45YR14

MODICON AS-4863-025 USPP AS4863025

ALLEN BRADLEY 6151BAADABAZAAZ USPP 6151BAADABAZAAZ

SYMAX 8884-SPR-25 USPP 8884SPR25

ALLEN BRADLEY 1336-B020-EAE-F?A2-L1 USPP 1336B020EAEFA2L

ATLAS COPCO 4240-0151-01 USPP 4240015101

RELIANCE ELECTRIC 0-52841 USPP 052841

XYCOM 8320 USPP 8320

SIEMENS 6ES5-544-3UB11 USPP 6ES55443UB11

MODICON AS-P451-622 NSFP ASP451622

MITSUBISHI A985GOT-TBD USPP A985GOTTBD

RAYTHEON B34201-00-03-0 USPP B3420100030

ALLEN BRADLEY 1772-M16 USPP 1772M16

RELIANCE ELECTRIC 603515-5A USPP 6035155A

專業(yè)銷售進口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，福克斯波羅、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，機器人系統(tǒng)配件，大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
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、進而練習(xí)整數(shù)運算、實數(shù)運算、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證，比如變頻器+電機+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。

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