?1794-IM8
1794-IM8
1794-IM8
1. 設(shè)計(jì)注意事項(xiàng)
設(shè)計(jì)時(shí)主要應(yīng)注意以下幾方面:
(1)PLC輸出電路中沒(méi)有保護(hù),因此在外部電路中應(yīng)設(shè)置串聯(lián)熔斷器等保護(hù)裝置,以防止負(fù)載短路造成PLC損壞。熔斷器容量一般為0.5A。
(2)PLC存在I/O響應(yīng)延遲問(wèn)題,因此在快速響應(yīng)設(shè)備中應(yīng)加以注意。MPI通信協(xié)議雖簡(jiǎn)單易行,但響應(yīng)速度較慢。
(3)編制控制程序時(shí),最好用模塊式結(jié)構(gòu)程序。這樣既可增強(qiáng)程序的可讀性,方便調(diào)試和維護(hù)工作;又能使數(shù)據(jù)庫(kù)結(jié)構(gòu)統(tǒng)一,方便WinCC組態(tài)時(shí)變量標(biāo)簽的統(tǒng)一編制和設(shè)備狀態(tài)的統(tǒng)一顯示。
(4)硬件資源。要合理配置硬件資源,以提高系統(tǒng)可靠性。如PLC電源配電系統(tǒng)要配備冗余的UPS不間斷電源,以排除停電對(duì)全線運(yùn)行的不利影響。又如對(duì)電機(jī)的控制回路要進(jìn)行繼電器隔離,以消除外部負(fù)載對(duì)I/O模塊的可能損壞。另外,系統(tǒng)設(shè)備要采用獨(dú)立的接地系統(tǒng),以減少雜波干擾。
備貨,備貨,降降降,火火火,火火火……
備貨,備貨,降降降,火火火,火火火……
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公司名稱:廈門(mén)泰尼電氣有限公司
聯(lián)系人:小黃(銷售代表)
聯(lián)系電話:0592-6809319
傳真號(hào)碼:0592-6890859(麻煩備注01006收)
手機(jī):18030265259
QQ號(hào)碼:2917675397
郵箱:29176753970@qq.com
誠(chéng)信經(jīng)營(yíng),質(zhì)量為首,誠(chéng)信至上,泰尼電氣小黃竭誠(chéng)為您服務(wù)?。。?/span>
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