6ES7972-0BA60-0XA0總線模塊,6ES7972-0BA60-0XA0使用教程
節(jié)點(diǎn)總線故障
節(jié)點(diǎn)總線材料通常是同軸電纜,所以只要有一處電纜斷開(kāi),總線上所有設(shè)備的通訊都會(huì)癱瘓,會(huì)造成數(shù)據(jù)丟失、設(shè)備驟停以及操作中斷等嚴(yán)重現(xiàn)象,最終可能直接或間接地造成巨大損失。同軸電纜的頻繁拔插會(huì)導(dǎo)致接觸不良,造成信號(hào)中斷。6ES7972-0BA60-0XA0過(guò)大的接觸電阻也會(huì)對(duì)通訊線路造成影響,傳輸數(shù)據(jù)負(fù)載較大會(huì)導(dǎo)致數(shù)據(jù)準(zhǔn)確性降低。
為解決以上問(wèn)題,可以采用雙冗余設(shè)置,但電纜連接要處于模塊后方,以保證同軸電纜不受機(jī)械運(yùn)行過(guò)程中產(chǎn)生的不利影響。只有在維護(hù)節(jié)點(diǎn)總線時(shí)進(jìn)行拔插,無(wú)其他特殊情況禁止多次拔插。要確保線路接觸電阻處于正常水平,并且定期檢查線路電阻情況。
02 現(xiàn)場(chǎng)總線故障
現(xiàn)場(chǎng)總線材料為雙絞線,現(xiàn)場(chǎng)總線連接的設(shè)備是生產(chǎn)工藝一線設(shè)備,能夠直接影響到生產(chǎn)過(guò)程。由于它處于核電生產(chǎn)現(xiàn)場(chǎng),工作環(huán)境惡劣,因此受到各種不利因素的干擾極大,包括生產(chǎn)過(guò)程中對(duì)其接觸,受環(huán)境和機(jī)械設(shè)備的影響會(huì)導(dǎo)致現(xiàn)場(chǎng)總線發(fā)生變形,加之母線接觸不良,所以發(fā)生故障的可能性較大,對(duì)DCS通訊系統(tǒng)的影響也較大。
通過(guò)現(xiàn)場(chǎng)實(shí)際情況可以采用雙冗余設(shè)置,在接口上增加一對(duì)通信線路,增加線路傳輸數(shù)據(jù)的可靠性和準(zhǔn)確性。現(xiàn)場(chǎng)總線和設(shè)備的連接部位較為敏感,因此必須保證連接的可靠性。在拆卸和安裝現(xiàn)場(chǎng)總線時(shí),要保證連接部分牢固可靠,并且進(jìn)行使總線分支處于不受機(jī)械設(shè)備印象的位置,保障DCS通訊線路的安全。
03 地址標(biāo)識(shí)故障6ES7972-0BA60-0XA0總線模塊
就地組件和總線接口的地址標(biāo)識(shí)出錯(cuò)時(shí),整個(gè)通信網(wǎng)絡(luò)將陷入混亂。會(huì)出現(xiàn)下載和更新程序故障、地址符號(hào)混亂、數(shù)據(jù)無(wú)法尋址和關(guān)機(jī)事故等事故。此外,人為錯(cuò)誤地址標(biāo)識(shí)的改變還會(huì)導(dǎo)致數(shù)據(jù)包丟失等情況,對(duì)DCS通訊系統(tǒng)造成毀滅性的影響。
因此,要在修改組件之前提前關(guān)閉系統(tǒng),及時(shí)刷新配置數(shù)據(jù)。
cut off or connected by means of relay or zero crossing trigger. The first three are position proportional PID, and the result of PID operation mainly corresponds to
Regulating valve
Valve opening. Let's take the second control method as an example. After calculating ⊿ U (n), we usually normalize it first, that is, divide it by the range of the temperature you want to control. ⊿U(n)0_ 1 = ⊿ U (n) / (hhll) and the time proportional PID output corresponds to the result of "positional PID operation". Therefore, we want to talk about the cumulative result, u (n) 0_ 1+=⊿U(n)0_ 1 then convert the secondary results into the duty cycle corresponding to the control cycle. To output the reciprocating spraying machine, which is suitable for the spraying of various products, such as computer shell, telephone, mobile phone, camera, headset, laptop, portable CD, MD shell, keyboard, silicone key, lamp, TV bottom and