中海德（福建）工業(yè)設(shè)備有限公司是一家長(zhǎng)年專業(yè)從事****品牌ABB DSQC機(jī)器人系統(tǒng)模塊備件及西門子摩爾（Siemens Moore APACS）控制系統(tǒng)零部件銷售企業(yè)、我們售出的備品備件均提供一年的質(zhì)量保證、并且都經(jīng)過(guò)了嚴(yán)格的測(cè)試和認(rèn)證。

公司自成立以來(lái)始終堅(jiān)持以純電子商務(wù)模式運(yùn)營(yíng)、縮減中間環(huán)節(jié)、為客戶在**時(shí)間提供優(yōu)質(zhì)的產(chǎn)品及滿意的服務(wù)、為您的生產(chǎn)以及采購(gòu)工作提供‘安全 快捷 方便’公司擁有完善的物流供應(yīng)系統(tǒng)、現(xiàn)已與眾多國(guó)外**品牌生產(chǎn)廠商建立了良好的合作關(guān)系。

中海德（福建）工業(yè)設(shè)備有限公司優(yōu)勢(shì)品牌

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*法國(guó)SCHNEIDER施耐德：140系列模塊與TSX模塊、M580、M340、原百格拉伺服一體化電機(jī)、FOXBORO福克斯波羅定位器

*德國(guó)REXROTH力士樂(lè)：伺服電機(jī)、驅(qū)動(dòng)器、擰緊系統(tǒng)

*美國(guó)HONEYWELL霍尼韋爾： MAXON燃燒備件、測(cè)厚儀配件、壓力傳感器

*美國(guó)AB羅克韋爾：1756/1746模塊、觸摸屏、變頻器、軟啟、大型號(hào)變頻器板卡

*日本MITSUBISHI三菱：數(shù)控伺服MDS

*日本FANUC發(fā)那科：數(shù)控伺服

*意大利MINIMOTOR：電機(jī)

*德國(guó)PHOENIX菲尼克斯：電源

*德國(guó)E+H：超聲波物位儀、溶解氧變送器、現(xiàn)場(chǎng)變送器、分析儀傳感器探頭、PH計(jì)電極及配件

*美國(guó)VICKERS威格仕：泵、閥

*美國(guó)HAWE哈威：泵、閥   等等其他歐美日系品牌

公司名稱：中海德（福建）工業(yè)設(shè)備有限公司

商務(wù)銷售：游麗芳

商務(wù)座機(jī)：0591-83972114

商務(wù)手機(jī)：15306915625

QQ號(hào)碼:2851617308

EMAIL：2851617308@qq.com

官網(wǎng)：www.zhdfj.com

地址：福州市閩侯縣正榮財(cái)富中心SOHO3號(hào)樓8樓820中海德公司

IEC61131-3是PLC的編程語(yǔ)言標(biāo)準(zhǔn)。IEC61131-3是**上*一個(gè)，也是至今為止**的工業(yè)控制領(lǐng)域的編程語(yǔ)言標(biāo)準(zhǔn)。IEC61131-3有三種POU：程序、功能塊和功能。

功能是有多個(gè)輸入?yún)?shù)和一個(gè)輸出參數(shù)（返回值）的POU，返回值的名稱與功能的名稱相同，需要定義返回值的數(shù)據(jù)類型。調(diào)用具有相同輸入值的功能總是返回相同的結(jié)果。功能可以調(diào)用其他功能，但是不能調(diào)用功能塊或程序。功能可定義的局部變量有VAR和VAR_INPUT。

功能塊是有多個(gè)輸入/輸出參數(shù)和內(nèi)部存儲(chǔ)單元的POU，功能塊的輸出參數(shù)值與其內(nèi)部存儲(chǔ)單元的值有關(guān)。功能塊可以調(diào)用其他功能 塊或功能，但是不能調(diào)用程序。 在調(diào)用功能塊之前，必須在要調(diào)用功能塊的POU中為每次調(diào)用聲明功能塊的實(shí)例，操作系統(tǒng)將為每次調(diào)用分配功能塊**的存儲(chǔ)區(qū)。

先了解一下空預(yù)器的驅(qū)動(dòng)方式：中心驅(qū)動(dòng)和圍帶驅(qū)動(dòng)。顧名思義，中心驅(qū)動(dòng)就是空預(yù)器的中心處進(jìn)行電機(jī)驅(qū)動(dòng)，而圍帶驅(qū)動(dòng)就是從空預(yù)器的側(cè)面進(jìn)行電機(jī)驅(qū)動(dòng)。他們的廠家代表分別為“哈鍋”和“上鍋”，各有特點(diǎn)。

     空預(yù)器的起動(dòng)必須通過(guò)變頻器進(jìn)行“軟啟動(dòng)”，好比手動(dòng)擋汽車的離合器“緩慢抬起”，否則容易“熄火”，所以必須使用變頻器。由于空預(yù)器起動(dòng)以后一直保持勻速旋轉(zhuǎn)，約1轉(zhuǎn)/分鐘（電機(jī)工頻50Hz），考慮到變頻器**50Hz輸出的穩(wěn)定性不如“開(kāi)關(guān)直接驅(qū)動(dòng)”，于是就有了“空預(yù)器變頻切工頻”。

下面就來(lái)模擬一遍空預(yù)器變頻切工頻。

     dcs指令啟動(dòng)空預(yù)器。

     空預(yù)器主電機(jī)變頻器啟動(dòng)，開(kāi)始由0Hz加速至50Hz，到達(dá)50Hz后，變頻器發(fā)出“頻率到達(dá)”指令，控制回路斷開(kāi)變頻器，經(jīng)過(guò)“延時(shí)1”，吸合工頻接觸器。空預(yù)器主電機(jī)變頻切工頻結(jié)束。
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