1756-HSC
1756-HSC
1756-HSC
【誠信經(jīng)營】【質(zhì)量可靠】【進(jìn)口原裝】【拆包防偽】
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武夷山新力源自動化設(shè)備有限公司
? ? ? 【聯(lián)系人】: 李鵬
? ? ? 【業(yè)務(wù)QQ】: 3288494891
? ? ? 【電 ?話】: 0599-5312273
? ? ? 【傳 ?真】: 0599-5312270
? ? ? 【手 ?機(jī)】: 18020999961
? ? ? 【郵 ?電】: 3288494891@qq.com
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? ? 閉環(huán)控制的變頻節(jié)能系統(tǒng)用途很廣,各種場合的變頻節(jié)能系統(tǒng)的拖動方式及控制方式各有不同,具體應(yīng)用時(shí)應(yīng)根據(jù)實(shí)際情況選擇設(shè)計(jì)。下面列舉一些:?
? ? 中央空調(diào)節(jié)能:冷凍泵、冷卻泵、主機(jī)、卻塔風(fēng)機(jī)、風(fēng)機(jī)盤管等。?
? ? 恒壓供水:水廠一、二級泵,供水管網(wǎng)增壓泵、大廈供水水泵等?
? ? 鍋爐:引風(fēng)機(jī)、送風(fēng)機(jī)、給水泵等,變頻節(jié)能系統(tǒng)的控制調(diào)節(jié)預(yù)處理信號由鍋爐自動控制系統(tǒng)、DCS或多沖量控制系統(tǒng)給出。?
? ? 汽輪機(jī):循環(huán)泵、凝結(jié)泵等,其控制調(diào)節(jié)預(yù)處理信號由汽輪機(jī)自動控制系統(tǒng)及DCS給出。?
? ? 純水處理系統(tǒng):軟化水泵、增壓泵等。?
? ? 潔凈室:增壓風(fēng)機(jī)、FFU群控等等。整個閉環(huán)控制的變頻節(jié)能系統(tǒng)的組成設(shè)備及其作用:?
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? ? (1)PLC選用由CPU224XP、DI/DO模塊、AI/AO模塊組成。PLC作為控制單元,是整個系統(tǒng)的控制核心。其主要的作用要體現(xiàn)以下幾方面:?
? ? ①完成對系統(tǒng)各種數(shù)據(jù)的采集以及數(shù)字量與模擬量的相互轉(zhuǎn)換。?
? ? ②完成對整個系統(tǒng)的邏輯控制及PID調(diào)節(jié)的運(yùn)算。?
? ? ③向觸摸屏提供所采集及處理的數(shù)據(jù),并執(zhí)行觸摸屏發(fā)出的各種指令。?
? ? ④將PID運(yùn)算的數(shù)據(jù)結(jié)果轉(zhuǎn)換成模擬信號,作為調(diào)節(jié)變頻器的輸出頻率的控制信號。?
? ? ⑤通過通信電纜及USS4協(xié)議完成對變頻器內(nèi)部參數(shù)讀寫及控制。?
? ? (2)觸摸屏其主要作用如下:?
? ? ①可實(shí)時(shí)顯示設(shè)備和系統(tǒng)的運(yùn)行狀態(tài)。?
? ? ②通過觸摸向PLC發(fā)出指令和數(shù)據(jù),再通過PLC完成對系統(tǒng)或設(shè)備的控制。
? ? ③可做成多幅多種監(jiān)控畫面,替代了傳統(tǒng)的電氣操作盤及顯示記錄儀表等,且功能更加強(qiáng)大。?
? ? (3)變頻器:通過USS4協(xié)議可由觸摸屏通過PLC設(shè)置其內(nèi)部的部分參數(shù),根據(jù)PLC發(fā)送過來的數(shù)據(jù)(模擬量)值調(diào)節(jié)水泵或風(fēng)機(jī)的轉(zhuǎn)速,并將其內(nèi)部運(yùn)行參數(shù)反饋到PLC。?
? ? (4)壓力、溫度等傳感器:將被控制系統(tǒng)(水系統(tǒng)或風(fēng)系統(tǒng))的實(shí)際參數(shù)值轉(zhuǎn)變成電信號上傳至PLC。?
? ? (5)電氣元件:給PLC、觸摸屏、變頻器及傳感器等供電,完成各種操作及驅(qū)動等。?
? ? 觸摸屏畫面設(shè)計(jì)?
? ? 觸摸屏畫面由ProTool等專用軟件進(jìn)行設(shè)計(jì),然后先通過編程電腦調(diào)試,合格后再下載到觸摸屏。觸摸屏畫面總數(shù)應(yīng)在其存儲空間允許的范圍內(nèi),各畫面之間盡量做到可相互及強(qiáng)制切換。?
? ? (1)主畫面的設(shè)計(jì)?
? ? 一般的,可用歡迎畫面或被控系統(tǒng)的主系統(tǒng)畫面作為主畫面,該畫面可進(jìn)入到各分畫面。各分畫面均能一步返回主畫面。若是將被控主系統(tǒng)畫面作為主畫面,則應(yīng)在畫面中顯示被控系統(tǒng)的一些住要參數(shù),以便在此畫面上對整個被控系統(tǒng)有大致的了結(jié)。?
? ? (2)控制畫面的設(shè)計(jì)?
? ? 該種畫面主要用來控制被控設(shè)備的啟停及顯示變頻器內(nèi)部的參數(shù),也可將變頻器參數(shù)的設(shè)定做在其中。該種畫面的數(shù)量在觸摸屏畫面中占的最多,其具體畫面數(shù)量由實(shí)際被控設(shè)備決定。?
? ? (3)參數(shù)設(shè)置頁面的設(shè)計(jì)?
? ? 該畫面主要是對變頻器的內(nèi)部參數(shù)進(jìn)行設(shè)定,同時(shí)還應(yīng)顯示參數(shù)設(shè)定完成的情況,實(shí)際制做時(shí)還應(yīng)考慮加密的問題。?
? ? (4)實(shí)時(shí)趨勢頁面的設(shè)計(jì)?
? ? 該畫面住要是以曲線記錄的形式來顯示被控值、變頻器的主要工作參數(shù)(如輸出頻率)等的實(shí)時(shí)狀態(tài)。?
? ? (5)信息記錄頁面的設(shè)計(jì)?
? ? 該畫面主要是記錄可能出現(xiàn)的設(shè)備損壞、過載、數(shù)值超范圍和系統(tǒng)急停等故障。另外該畫面還可記錄各設(shè)備啟停操作,作為憑證。?
? ? (6)節(jié)能畫面的設(shè)計(jì)?
? ? 該畫面主要是記錄和顯示變頻器的累積用電數(shù)及實(shí)時(shí)節(jié)電狀態(tài),以便向用戶展示變頻節(jié)能的好處,也可用來與其它的節(jié)電測量作比較。PLC程序設(shè)計(jì)?
? ? PLC程序由專用編程軟件進(jìn)行設(shè)計(jì),然后通過編程電腦下載到PLC進(jìn)行聯(lián)機(jī)調(diào)試,合格后即可使用。PLC在編程前應(yīng)先對各功能程序段的地址進(jìn)行規(guī)劃,以免重復(fù)使用同一地址,造成誤動。?
? ? (1)邏輯功能的設(shè)計(jì)?
? ? 這部分程序主要是完成各變頻水泵(或風(fēng)機(jī))的啟動停止、聯(lián)動、聯(lián)鎖及自動投切等等功能,一般在離線狀態(tài)下就能完成軟件邏輯功能的測試。
? ?(2)PID功能的設(shè)計(jì)?
? ? 通過PID向?qū)Э赏瓿蒔ID調(diào)節(jié)程序,具體應(yīng)用時(shí)需根據(jù)實(shí)際被控設(shè)備及采樣設(shè)備決定其配置。?
? ? (3)采樣程序的設(shè)計(jì)?
? ? 采樣元件使用標(biāo)準(zhǔn)配置時(shí),應(yīng)注意采樣A/D轉(zhuǎn)換后的具體數(shù)據(jù)是否與PID及顯示等程序配套,實(shí)際制做時(shí)還應(yīng)考慮采樣是多路且相關(guān)聯(lián)的情況。?
? ? (4)PLC與變頻器通信程序的設(shè)計(jì)?
? ? ?變頻器的通信一般使用USS4協(xié)議程序來完成,該程序的主要目的是監(jiān)控變頻器的實(shí)時(shí)運(yùn)行狀態(tài)。
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? ? (5)其它輔助程序的設(shè)計(jì)?
? ? ?PLC程序在實(shí)際編程過程中,需考慮對一些程序進(jìn)行修補(bǔ),盡量減少程序漏洞,反復(fù)推敲,不斷的總結(jié)完善。 ?
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