Fanuc 3051DG1A62A1AHR5B4E8M5Q4D4DF因而，每一次輪巡的最大通訊量為：
3584+3584+125*20=9668byte
9668/187500=5.15%
可見，操控網絡即便在悉數測點依照最快掃描周期而且在極限傳輸量情況下，也處于十分閑暇情況。因而profibus-dp的負荷率徹底滿足運用懇求。
(2) ethernet網絡負荷剖析。ethernet 通訊選用tcp/ip協議，通訊有發送和承認操控。幀操控信息開支=12(幀距離)+8(同步碼)+18(幀首、尾)+24(ip包首部)+24(tcp包首部)=86byte。由協議可知：
用戶數據均勻包長=1452(最大用戶數據包長)/2=726byte，則：
均勻用戶數據運用率=用戶數據均勻包長/(發送幀操控信息開支+承認幀操控信息開支+用戶數據均勻包長)=726/(86+86+726)=80.85%
由上述剖析可知，此dcs體系可以滿足安穩的操控懇求，硬件體系有較大的冗余量，可以保證體系的安穩性。
4、操控體系的功用完結
4.1 上煤道路的挑選
因為華祥熱電有限公司的輸煤皮帶體系對比雜亂，首要體如今輸煤皮帶的上下級聯絡對比雜亂。體系由35條皮帶構成，給三個單元的原煤倉上煤。例如有如下上煤道路：
一單元上煤道路：
(1) #0甲皮帶→#5甲皮帶→#7甲、乙皮帶→犁煤器→煤倉。
(2) 推煤機→#0乙側皮帶(#1、#2輪斗機)→#8甲側皮帶→#2甲側皮帶→#1碎煤機→給料帶回轉→#3皮帶→#5甲、乙側皮帶→#7甲、乙側皮帶→犁煤器→煤倉。
(3) 翻車機#1、#2給料帶→#1甲、乙皮帶→#2甲側皮帶→#1碎煤機→給料帶回轉→#3皮帶→#5甲、乙側皮帶→#7甲、乙側皮帶→犁煤器→煤倉。
由上面的道路可知，體系的上煤道路較雜亂，所以咱們選用了首要挑選上煤結尾，按由后向前的次第挑選上煤道路，直到挑選上煤起點。別的，咱們也給出了幾條最優的上煤道路，供用戶進行便利敏捷的挑選。
4.2 手動與主動辦法
體系的發動和中止辦法可以為手動和主動辦法。當在體系圖上挑選運/配煤設備后、并接納到相應的設備“預備好”信號;悉數指示標明可以發動時，操作人員通過體系發動指令來發動運/配煤體系。當不答應發動或所選設備無效時，內部連鎖能避免任何設備發動。當“體系中止”指令輸入鍵盤時，體系按正常鏟除次第中止，或當呈現損害人身、設備時，體系應當即中止。主動辦法為首要的作業辦法，作業人員應能挑選一個完好和適宜的途徑，以便將煤運送到煤倉。
4.3 連鎖功用的完結
手動辦法中，除了作業人員有必要依照精確次第通過鍵盤上的發動/中止指令來發動和中止各個設備，體系也應象主動辦法一樣徹底連鎖。以保證作業人員按精確的次第來發動和中止悉數設備。發動上煤設備優先發動碎煤機，發動時按逆煤流方向，從終究一條皮帶(及有關設備)開端一次發動。直到榜首條皮帶(及有關設備)發動后才開端供煤;停運時按順煤流方向，先停供煤設備，然后從榜首臺至終究一臺設備順次中止，終究中止碎煤機作業。
4.4 主動加倉功用的完結
主動加倉功用首要是運用了功用塊圖和st(構造化文本)編寫的程序來完結的。其間首要有對比邏輯、與邏輯、或邏輯，還有分支構造句子，通過現場作業，能按預訂方針完結主動加倉功用。
廈門興銳達自動化設備有限公司
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