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(wǎng)絡(luò)即便在悉數(shù)測點(diǎn)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(fù)荷率徹底滿足運(yùn)用懇求。
(2) ethernet網(wǎng)絡(luò)負(fù)荷剖析。ethernet 通訊選用tcp/ip協(xié)議，通訊有發(fā)送和承認(rèn)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(xié)議可知：
用戶數(shù)據(jù)均勻包長=1452(最大用戶數(shù)據(jù)包長)/2=726byte，則：
均勻用戶數(shù)據(jù)運(yùn)用率=用戶數(shù)據(jù)均勻包長/(發(fā)送幀操控信息開支+承認(rèn)幀操控信息開支+用戶數(shù)據(jù)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(wěn)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(wěn)性。
4、操控體系的功用完結(jié)
4.1 上煤道路的挑選
因?yàn)槿A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(lián)絡(luò)對比雜亂。體系由35條皮帶構(gòu)成，給三個(gè)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(jī)→#0乙側(cè)皮帶(#1、#2輪斗機(jī))→#8甲側(cè)皮帶→#2甲側(cè)皮帶→#1碎煤機(jī)→給料帶回轉(zhuǎn)→#3皮帶→#5甲、乙側(cè)皮帶→#7甲、乙側(cè)皮帶→犁煤器→煤倉。
(3) 翻車機(jī)#1、#2給料帶→#1甲、乙皮帶→#2甲側(cè)皮帶→#1碎煤機(jī)→給料帶回轉(zhuǎn)→#3皮帶→#5甲、乙側(cè)皮帶→#7甲、乙側(cè)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(jié)尾，按由后向前的次第挑選上煤道路，直到挑選上煤起點(diǎn)。別的，咱們也給出了幾條最優(yōu)的上煤道路，供用戶進(jìn)行便利敏捷的挑選。
4.2 手動與主動辦法
體系的發(fā)動和中止辦法可以為手動和主動辦法。當(dāng)在體系圖上挑選運(yùn)/配煤設(shè)備后、并接納到相應(yīng)的設(shè)備“預(yù)備好”信號;悉數(shù)指示標(biāo)明可以發(fā)動時(shí)，操作人員通過體系發(fā)動指令來發(fā)動運(yùn)/配煤體系。當(dāng)不答應(yīng)發(fā)動或所選設(shè)備無效時(shí)，內(nèi)部連鎖能避免任何設(shè)備發(fā)動。當(dāng)“體系中止”指令輸入鍵盤時(shí)，體系按正常鏟除次第中止，或當(dāng)呈現(xiàn)損害人身、設(shè)備時(shí)，體系應(yīng)當(dāng)即中止。主動辦法為首要的作業(yè)辦法，作業(yè)人員應(yīng)能挑選一個(gè)完好和適宜的途徑，以便將煤運(yùn)送到煤倉。
4.3 連鎖功用的完結(jié)
手動辦法中，除了作業(yè)人員有必要依照精確次第通過鍵盤上的發(fā)動/中止指令來發(fā)動和中止各個(gè)設(shè)備，體系也應(yīng)象主動辦法一樣徹底連鎖。以保證作業(yè)人員按精確的次第來發(fā)動和中止悉數(shù)設(shè)備。發(fā)動上煤設(shè)備優(yōu)先發(fā)動碎煤機(jī)，發(fā)動時(shí)按逆煤流方向，從終究一條皮帶(及有關(guān)設(shè)備)開端一次發(fā)動。直到榜首條皮帶(及有關(guān)設(shè)備)發(fā)動后才開端供煤;停運(yùn)時(shí)按順煤流方向，先停供煤設(shè)備，然后從榜首臺至終究一臺設(shè)備順次中止，終究中止碎煤機(jī)作業(yè)。
4.4 主動加倉功用的完結(jié)
主動加倉功用首要是運(yùn)用了功用塊圖和st(構(gòu)造化文本)編寫的程序來完結(jié)的。其間首要有對比邏輯、與邏輯、或邏輯，還有分支構(gòu)造句子，通過現(xiàn)場作業(yè)，能按預(yù)訂方針完結(jié)主動加倉功用。
廈門興銳達(dá)自動化設(shè)備有限公司
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