PHARPS32000000
?DCS控制統(tǒng)使用人機界面(SCADA或者HMI)來直接設(shè)定全部的機器系統(tǒng),并使用屏幕監(jiān)視相關(guān)的配置及結(jié)構(gòu).系統(tǒng)能設(shè)定每個機器的狀況需求如電流,速度,溫度,壓力,上限下限,默認(rèn)值等等.
先用PLC處理相關(guān)的數(shù)值,在全部設(shè)定資料經(jīng)過計算后,經(jīng)由通訊網(wǎng)路傳輸?shù)今R達(dá)控制器或相關(guān)控制器來控制馬達(dá)速度與其它的控制裝備.
在機器設(shè)定系統(tǒng),我們一般定義３個層次的 login 密碼來管理全部的操作人員,工程師或職員于不同層次的權(quán)限來操作這個系統(tǒng).
DCS控制纟統(tǒng)的設(shè)定功能包含：
1. 機器配置及結(jié)構(gòu)
在屏幕上操作人員能設(shè)定
機械,輪徑,馬達(dá),齒輪比率,溫度,壓力,等等.操作人員能進(jìn)一步選擇是否使用某段機械或者比例速度和設(shè)定相關(guān)的機械裝置數(shù)據(jù).
2. 速度設(shè)定
每一個馬達(dá)控制從屏幕能設(shè)定速度及比例,操作人員能設(shè)定主要的線速度,加速比率和這臺機器生產(chǎn)線速度,單位為RPM,M/min或者百分比( ％ ).
全部的速度設(shè)定數(shù)據(jù)將仍然是儲存于這部計算機的記憶體里面,那意指假如這臺機器是在連續(xù)使用中,速度設(shè)定仍然是有效的為下一個工作行程.
3. 限制值設(shè)定
這限制值設(shè)定主要的功能是限制較高的和較低的限制值,以確保設(shè)定的速度,溫度,壓力等的回饋值真正地在有效控制范圍HIGHT LIMIT及LOW LIMIT之間.
HIGHT-HIGHT LIMIT較高的限制值通常是這些產(chǎn)品能忍耐的上限.
HIGHT LIMIT較高的限制值通常是這些產(chǎn)品規(guī)挌充許的上限
LOW LIMIT較低的限制值通常是這些產(chǎn)品規(guī)挌充許的下限.
LOW-LOW LIMIT較低的限制值通常是這些產(chǎn)品能忍耐的下限
4. 速度設(shè)定
設(shè)定速度參考值(SPEED REFRENCE)的目的為檢查驅(qū)動器式其它電氣設(shè)備是否保證在足夠范圍,它必須在驅(qū)動器和馬達(dá)或其它電氣設(shè)備的最大的速度范圍內(nèi).
考慮到每一個機器速度修正的需求和自動的加速控制, 設(shè)定速度參考值通常只可有最大的速度的 90~95 %左右.速度參考值的指示一般使用RPM或百分比 ％ 顯示.
5. 啟動和停止設(shè)定
為完成平滑的速度加速,速度設(shè)定參考值被個別地產(chǎn)生在每個驅(qū)動器上使用一個直線性的或者S曲線式的功能來啟動和停止這臺機器.
停止方法被分成三類：
1.緊急的停止：使用最快的速度來煞車這臺機器.
2.正常的停止：根據(jù)設(shè)定的加速和減速時間停止.
3.自由的停止：沒有任何煞車停止,停止時間依賴機器的摩擦及慣量.
6. PID 值設(shè)定
全部的溫度,壓力,流量控制總是經(jīng)由PLC的軟件程序撰寫來處理PID控制值.
P為比率（單位＝百分比(％)）,為調(diào)整安定/隱定度.
I為績分（單位＝秒）,為調(diào)整反應(yīng)/靈敏度.
D為微分（單位＝秒）,為調(diào)整誤差量補償度.
PID值可以是預(yù)設(shè)在SCADA工作站,這個PID值有必須是儲存經(jīng)由工程師調(diào)整后直接地設(shè)定或者經(jīng)由軟件自動調(diào)整然后的設(shè)定值.
PID的調(diào)整將實現(xiàn)這機器的安定或準(zhǔn)確度,它有時候必須用長時間的觀察和調(diào)整來精確地完成期待的性能.
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廈門仲鑫達(dá)自動化設(shè)備有限公司
歐陽英（銷售經(jīng)理）
移動電話：13394057292
電話：0592-5856292
郵箱：370848070@qq
Q?Q?：370848070?,?2687338778
地址；廈門思明區(qū)湖濱東路湖光大廈8樓A單元
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