CMP-400-POWER-SUPPL現貨
功能表圖(Sepuential Function Chart)程序設計語言
功能表圖程序設計語言是用功能表圖來描述程序的一種程序設計語言。它是近年來發展起來的一種程序設計語言。采用功能表圖的描述,控制系統被分為若干個子系統,從功能入手,使系統的操作具有明確的含義,便于設計人員和操作人員設計思想的溝通,便于程序的分工設計和檢查調試。
功能表圖程序設計語言的特點是:
(1)以功能為主線,條理清楚,便于對程序操作的理解和溝通;
(2)對大型的程序,可分工設計,采用較為靈活的程序結構,可節省程序設計時間和調試時間;
(3)常用于系統的規模校大,程序關系較復雜的場合;
(4)只有在活動步的命令和操作被執行,對活動步后的轉換進行掃描,因此,整個程序的掃描時間較其他程序編制的程序掃描時間要大大縮短。
功能表圖來源于佩特利(Petri)網,由于它具有圖形表達方式,能較簡單和清楚地描述并發系統和復雜系統的所有現象,并能對系統中存有的象死鎖、不等反常現象進行分析和建模,在模型的基礎上能直接編程,所以,得到了文泛的應用。近幾年推出的可編程控制器和小型集散控制系統中也已提供了采用功能表圖描述語言進行編程的軟件。關于佩特利(Petri)網的一些基本概念,我在以后有機會時再介紹給各位,以有助于對功能表圖的進一步理解。
1在變頻器輸入側(初級側)有配線,因而,存候裝各變頻器保舉的配線用斷器(MCCB)或漏電斷器(ELCB)(帶過電流功能)。請勿利用保舉功率以上的斷器。
*2MCCB或ELCB是在從別的的電源分手變頻器時利用的,因而,按照需要,請在各個變頻器上設置保舉的電磁接觸器(MC)。此外,把MC或螺線管等線圈設置在變頻器的附近時,請并列與浪涌接收器相毗連。
*3即便變頻器的主電源堵截,也但愿連結功能共作時的全體警報信號時,或但愿操作面板進行顯示時,請把本端子毗連到電源上。即便不向該端子供給電源輸入,變頻器也能夠運轉。
*4凡是不需要毗連。高功率因子電源PWM轉換器:與RHC系列(以下稱為PWM轉換器)組應時利用。
*5毗連直流電抗器(DCR)選配件時,請拆下端子P1-P(+)間的短棒后再進行毗連。
*6合用電機的輸出功率為75kW以上時,請務必毗連直流電抗器(DCR)選配件。
而且,電源變壓器的功率為500kVA以上,且是變頻器額定功率的10倍以上時,及在統一電源系統“有半導體負荷時”,請毗連直流電抗器(DCR)
*7在7.5kW以下的變頻器上的端子P(+)-DB之間,毗連有內置制動電阻器。在毗連了外部制動電阻器(選配件)時,請務必拆除內置制動電阻器的毗連。
*8是電機的接地用的端子。請按照需要毗連。
*9在節制信號線中,請利用雙絞線或屏障線。屏障線請接地。為了防止樂音導致的誤動作,請盡量與主電配線分手隔,切勿放入統一個電纜槽內。(距離10cm以上。)呈現交叉時,請與主電配線盡可能垂直訂交。
*10在端子FWD、REV以及X1~X9(數字輸入),端子Y1~Y4(晶體管輸出),端子Y5A/C,30A/B/C(接點輸出)中記錄的各類功能,顯示的是出廠時所付與的功能。
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SCIENTIFIC COLUMBUS/AMETE?K XLGI10S1-A TRANSDUCER ***NNB***
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SAZ-4201ER *NEW* OE Solenoid for Prestolite, Ametek 12V
Ametek US Gauge 1913 1000 psi 1/2 ANPT LBM size 4 1/2
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AMETEK USG SOLFRUNT GAUGE, 3/4", 1/4"
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++ AMETEK 0-100 PSI P-1535 GAGE GAUGE
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AMETEK USG 1559 2.5" 15# 1/4"CBM FILLABLE GAUGE 171739A
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CMP-400-POWER-SUPPL
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