ALLEN BRADLEY 1756-IR6I PLC通過Profibus總線控制功能,簡化了編程,解決了采用脈沖方向控制方式,接線眾多,丟脈沖導(dǎo)致定位精度不準(zhǔn),抗干擾能力差等缺點(diǎn);
◆ 系統(tǒng)配置Profibus總線快12Mbps的速度保證了控制精度,以柔印機(jī)少配置八組印刷單元32軸系統(tǒng)為例,主控制單元信號(hào)能夠在100毫秒之內(nèi)傳遞到所有32軸,的保證了系統(tǒng)的同步啟動(dòng),因此系統(tǒng)誤差很小,印刷精度高 。
ALLEN BRADLEY 1756-IR6I◆ 系統(tǒng)印刷誤差更小,印刷速度更快,工作效率高;
◆ 通訊速度快:Profibus總線快12Mbps的速度,大大縮短了通訊時(shí)間,提高了系統(tǒng)速度,克服了傳統(tǒng)485通訊方式通訊速度慢,交換數(shù)據(jù)量少,容易造成系統(tǒng)通訊堵塞的缺點(diǎn);
◆ 編程及其維護(hù)工作量少:以往的控制方式是每個(gè)印刷單元都有一個(gè)單獨(dú)的PLC來控制伺服,且要保證兩臺(tái)伺服完全同步,所以該單元的PLC是需要進(jìn)行獨(dú)立編程的。因此系統(tǒng)的工作量大且繁瑣,同時(shí)故障點(diǎn)增多,導(dǎo)致系統(tǒng)維護(hù)工作量增加;本系統(tǒng)則是所有的控制編程都在主CPU上完成而且編程都采用模塊化編程閱讀維護(hù)非常的簡單。設(shè)備故障只需更換相應(yīng)的故障設(shè)備就可,無需再次下載程序。不同的工藝要求也僅僅需要輸入不同的工藝參數(shù)即可,無需另行編程。
◆ 便利化操作:所有單元的伺服驅(qū)動(dòng)器均直接連接到Profibus總線上,主CPU對(duì)各組印花單元的參數(shù)設(shè)置、運(yùn)行狀態(tài)的監(jiān)控、管理能力進(jìn)一步加強(qiáng),簡化了操作并且維護(hù)極其簡單;
◆ 強(qiáng)大的故障檢測(cè)及處理能力 :主CPU通過Profibus總線實(shí)時(shí)監(jiān)控伺服運(yùn)行狀態(tài),及時(shí)把狀態(tài)信息、故障信息傳送到HMI上顯示出來,同時(shí)主CPU能夠根據(jù)每個(gè)伺服驅(qū)動(dòng)器所產(chǎn)生故障而對(duì)總線上其它從站采取相應(yīng)處理。
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