QTERM-G70

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描述

QTERM-G70

我國北方地區(qū)冬季目前普遍采用集中供暖方式進(jìn)行供熱。熱電廠通過城市高溫供熱管道將熱水送至各居民小區(qū)、企業(yè)中的換熱站。在換熱站，高溫管道（以下簡稱一次網(wǎng)）中的熱水與進(jìn)居室暖氣片（以下簡稱二次網(wǎng)）的熱水通過換熱器交換熱量。經(jīng)過換熱后，二次網(wǎng)中熱水流入各居室中。
? ? 在以上過程中，供熱調(diào)度部門需要對分散在不同地理位置換熱站中溫度、壓力、流量、液位等參數(shù)集中實(shí)時(shí)監(jiān)視，控制換熱站中各設(shè)備的運(yùn)行。同時(shí)，根據(jù)從現(xiàn)場監(jiān)測到的各換熱站運(yùn)行參數(shù)，調(diào)節(jié)熱電廠運(yùn)行工況，保證冬季整個(gè)供暖的穩(wěn)定運(yùn)行。
? ? 因此，各換熱站現(xiàn)場參數(shù)的采集、調(diào)度室與各換熱站的數(shù)據(jù)實(shí)時(shí)通訊就顯得至關(guān)重要。在這里，筆者提出一種先進(jìn)的無線監(jiān)控方案：各換熱站中安裝北京和利時(shí)系統(tǒng)工程股份有限公司的HOLLiAS-PLCG5完成對現(xiàn)場參數(shù)采集、設(shè)備控制，現(xiàn)場HOLLiAS-PLCG5通過GPRS網(wǎng)絡(luò)與調(diào)度中心控制計(jì)算機(jī)建立可靠、穩(wěn)定的通訊，在調(diào)度中心可對現(xiàn)場所有換熱站完成監(jiān)視、控制。
? ? 該方案已在沈陽皇姑熱電有限公司供暖監(jiān)控系統(tǒng)中得到良好實(shí)際應(yīng)用，下面做一詳細(xì)說明。
? ? 2系統(tǒng)概述
? ? 沈陽皇姑熱電有限公司供暖監(jiān)控系統(tǒng)如圖1所示由三部分組成：現(xiàn)場換熱站HOLLiAS-PLCG5控制部分、GPRS數(shù)據(jù)傳輸部分、調(diào)度室數(shù)據(jù)中心。通過HOLLiAS-PLCG5CP240RS-232模塊完成與GPRSDTU的數(shù)據(jù)交互。PLC定時(shí)將數(shù)據(jù)發(fā)送給GPRSDTU，同時(shí)PLC實(shí)時(shí)接收DTU發(fā)來的數(shù)據(jù)完成相應(yīng)控制功能。GPRSDTU在收到PLC發(fā)來的數(shù)據(jù)會(huì)立即轉(zhuǎn)發(fā)到數(shù)據(jù)中心。根據(jù)換熱站的實(shí)際情況，此次換熱站PLC每次向DTU發(fā)送幀格式數(shù)據(jù)量為140字節(jié)，包括所有模擬量和開關(guān)量。
? ? (1)現(xiàn)場換熱站HOLLiAS-PLCG5將各工藝參數(shù)實(shí)時(shí)采集后通過RS-232串口通信模塊將數(shù)據(jù)送往GPRSDTU通信模塊；同時(shí)，還可通過該通信模塊接收調(diào)度中心的指令。
? ? (2)GPRS數(shù)據(jù)傳輸部分在對GPRSDTU通信模塊進(jìn)行配置時(shí)預(yù)先輸入數(shù)據(jù)中心的固定IP地址。GPRSDTU通信模塊收到HOLLiAS-PLCG5發(fā)來的數(shù)據(jù)后，把這些數(shù)據(jù)送到前面設(shè)置的IP地址主機(jī)中（即數(shù)據(jù)中心路由器）。GPRSDTU發(fā)送數(shù)據(jù)的過程為：數(shù)據(jù)送到中國移動(dòng)GPRS網(wǎng)絡(luò)中，然后再經(jīng)過Internet，最后在數(shù)據(jù)中心通過ADSL進(jìn)行接收，數(shù)據(jù)中心路由器收到各換熱站的數(shù)據(jù)后轉(zhuǎn)發(fā)到數(shù)據(jù)服務(wù)器上。
? ? (3)調(diào)度室數(shù)據(jù)中心由ADSLMODEM、防火墻、路由器、數(shù)據(jù)中心服務(wù)器、客戶機(jī)、網(wǎng)關(guān)機(jī)組成。數(shù)據(jù)中心服務(wù)器通過ADSLModem接收來自各換熱站的數(shù)據(jù)，并對數(shù)據(jù)進(jìn)行存儲(chǔ)、歷史趨勢分析、報(bào)表打印等，其中一部分?jǐn)?shù)據(jù)還傳送到全廠MIS系統(tǒng)。

產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢價(jià)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

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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(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。

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