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西門(mén)子PLC與ABB變頻器之間的現(xiàn)場(chǎng)總線通訊技術(shù)
技術(shù)分類(lèi):軟件與信息集成 發(fā)表時(shí)間：2007-02-15
PLC主程序中調(diào)用兩個(gè)系統(tǒng)功能塊SFC14和SFC15來(lái)讀寫(xiě)這些數(shù)據(jù)，實(shí)現(xiàn)到變頻器的通信控制;
(3) 在主PLC程序中建立一個(gè)數(shù)據(jù)塊,，用于于變頻器的數(shù)據(jù)通信;建立一變量表,，用于觀測(cè)實(shí)時(shí)通訊效果。
?????? 4? 變頻器運(yùn)行設(shè)置
?????? 變頻器與PLC應(yīng)用Profibus-DP現(xiàn)場(chǎng)總線連成網(wǎng)絡(luò)后,，除在PLC自動(dòng)化系統(tǒng)中進(jìn)行編程外,，在每個(gè)變頻器上也要進(jìn)行適當(dāng)?shù)膮?shù)設(shè)置。
通訊電纜聯(lián)接后,，啟動(dòng)變頻器,，完成對(duì)變頻器通訊參數(shù)的
?????? 4.1? 基本設(shè)置。
(1) 51.01—模塊類(lèi)型,，本參數(shù)顯示由傳動(dòng)裝置探測(cè)到的模塊型號(hào)。其參數(shù)值用戶不可調(diào)整,。如果本參數(shù)沒(méi)有定義,，則不能在模塊與傳動(dòng)之間建立通訊。
(2) 51.02—本參數(shù)選擇通訊協(xié)議,，“0”為選擇Profibus-DP通訊協(xié)議,。
(3) 51.03—本參數(shù)為Profibu
s連接選擇的PPO類(lèi)型，“3”為PPO4,，但變頻器上的PPO類(lèi)型應(yīng)與PLC上組態(tài)的PPO類(lèi)型一致,。
(4) 51.04—本參數(shù)用于定義設(shè)備地址號(hào)，即變頻器的站點(diǎn)地址,，在Profibus連路上的每一臺(tái)設(shè)備都必須有一個(gè)單獨(dú)的地址,。本次設(shè)計(jì)中兩臺(tái)變頻器分別為2、3號(hào)站,。[1]
?????? 4.2? 過(guò)程參數(shù)的連接
?????? 過(guò)程參數(shù)互聯(lián)完成NPBA-12雙端口RAM連接器與變頻器相應(yīng)參數(shù)的定義和連接,，包括主站(PLC)到變頻器的連接和變頻器到主站(PLC)的連接兩部分。在變頻器上設(shè)定下列連接參數(shù),。
(1) 從PLC發(fā)送到傳動(dòng)裝置變頻器的PZD值
l PZD1—控制字,，如變頻器的啟動(dòng)使能,、停止、急停等控制命令;??
l PZD2—變頻器的頻率設(shè)定值,。
(2) 從傳動(dòng)裝置變頻器發(fā)送到PLC的PZD值
l PZD1—狀態(tài)字,如報(bào)警,、故障等變頻器運(yùn)行狀態(tài);
l PZD2—變頻器的速度實(shí)際值、電流實(shí)際值等,。
?????? 5? 結(jié)束語(yǔ)
?????? 變頻器控制系統(tǒng)采用了Profibus-DP現(xiàn)場(chǎng)總線控制模式后,，不但整個(gè)系統(tǒng)可靠性強(qiáng)，操作簡(jiǎn)便,，而且可根據(jù)工藝需要進(jìn)行靈活的功能修改,。該系統(tǒng)在濟(jì)鋼鮑德彩板有限公司應(yīng)用以后，運(yùn)行效果良好,，為今后總公司的自動(dòng)化設(shè)備(不同廠家的網(wǎng)絡(luò)通訊)提供了一個(gè)成功典范,。
?
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103S-BTD3-DC10C
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103S-BTD3-DC10C
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