西門子840D數控滾齒機黑屏/白屏修理診斷，西門(men)子(zi)(zi)數(shu)控(kong)(kong)(kong)系(xi)統840D維修(xiu)(xiu)，西門(men)子(zi)(zi)840D加(jia)工(gong)中心維修(xiu)(xiu)，我公(gong)司是(shi)專(zhuan)業從事西門(men)子(zi)(zi)數(shu)控(kong)(kong)(kong)系(xi)統，工(gong)業控(kong)(kong)(kong)制(zhi)化系(xi)統維修(xiu)(xiu)領域內的設備為(wei)主，涉及(ji)行(xing)業之廣泛，如：機(ji)械制(zhi)造(zao)，齒輪，磨具(ju)加(jia)工(gong),液壓，光伏能源(yuan)、半導體(ti)、紡(fang)織(zhi)、線(xian)纜(lan)電器制(zhi)造(zao)，能源(yuan)裝(zhuang)備，塑料(liao)、醫(yi)療、環保、冶金、造(zao)紙、汽車電子(zi)(zi)、鋼(gang)鐵(tie)、化工(gong)、鍋爐控(kong)(kong)(kong)制(zhi)、煉油、石化、光纖、橡膠、能源(yuan)發電、裝(zhuang)飾材料(liao)等行(xing)業。

西門子840D數控滾齒機黑屏/白屏修理診斷，西(xi)門(men)子(zi)數控(kong)(kong)(kong)系(xi)統維修(xiu)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)出現的(de)(de)或(huo)然性(xing)(xing)(xing)，分(fen)(fen)為(wei)(wei)系(xi)統性(xing)(xing)(xing)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)和隨(sui)機性(xing)(xing)(xing)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)。系(xi)統性(xing)(xing)(xing)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)是(shi)指(zhi)只要滿足一(yi)定(ding)的(de)(de)條件(jian)(jian)則(ze)一(yi)定(ding)會產生(sheng)的(de)(de)確(que)定(ding)的(de)(de)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang);而隨(sui)機性(xing)(xing)(xing)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)是(shi)指(zhi)在(zai)相同的(de)(de)條件(jian)(jian)下偶爾(er)發生(sheng)的(de)(de)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)，這類(lei)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)的(de)(de)分(fen)(fen)析較為(wei)(wei)困難，通(tong)常(chang)多與機床機械結構的(de)(de)局部(bu)(bu)松動錯位、部(bu)(bu)分(fen)(fen)電(dian)(dian)氣工(gong)(gong)件(jian)(jian)特性(xing)(xing)(xing)漂移(yi)或(huo)可(ke)靠性(xing)(xing)(xing)降低、電(dian)(dian)氣裝置內部(bu)(bu)溫度過高有關(guan)。此類(lei)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)的(de)(de)分(fen)(fen)析需(xu)(xu)(xu)經反復試驗、綜(zong)合判斷(duan)才可(ke)能排(pai)除。西(xi)門(men)子(zi)數控(kong)(kong)(kong)系(xi)統維修(xiu)從時域維修(xiu)趨向于數據域維修(xiu)，新(xin)出的(de)(de)數控(kong)(kong)(kong)系(xi)統的(de)(de)傳輸基本上(shang)已(yi)經開始總線為(wei)(wei)主，網絡化控(kong)(kong)(kong)制，靠以往的(de)(de)那種(zhong)頭痛(tong)醫頭，腳(jiao)(jiao)痛(tong)醫腳(jiao)(jiao)的(de)(de)傳統方(fang)法是(shi)無(wu)法診(zhen)斷(duan)這類(lei)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)的(de)(de)了，數控(kong)(kong)(kong)系(xi)統維修(xiu)也必須借助網絡診(zhen)斷(duan)工(gong)(gong)具(ju)來(lai)分(fen)(fen)析整體系(xi)統的(de)(de)數據才可(ke)能找到故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點，這些(xie)對數控(kong)(kong)(kong)維修(xiu)工(gong)(gong)程師的(de)(de)技術都是(shi)一(yi)種(zhong)考(kao)驗和挑(tiao)戰。以故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)發生(sheng)的(de)(de)部(bu)(bu)位，分(fen)(fen)為(wei)(wei)硬件(jian)(jian)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)和軟件(jian)(jian)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)。硬件(jian)(jian)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)是(shi)指(zhi)電(dian)(dian)子(zi)、電(dian)(dian)器件(jian)(jian)、印制電(dian)(dian)路(lu)板、電(dian)(dian)線電(dian)(dian)纜、接插件(jian)(jian)等的(de)(de)不正常(chang)狀態甚(shen)(shen)至(zhi)損壞，這是(shi)需(xu)(xu)(xu)要修(xiu)理(li)甚(shen)(shen)至(zhi)更換(huan)才可(ke)排(pai)除的(de)(de)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)。而軟件(jian)(jian)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)一(yi)般是(shi)指(zhi)PLC邏輯控(kong)(kong)(kong)制程序中(zhong)產生(sheng)的(de)(de)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)，需(xu)(xu)(xu)要輸入或(huo)修(xiu)改某些(xie)數據甚(shen)(shen)至(zhi)修(xiu)改PLC程序方(fang)可(ke)排(pai)除的(de)(de)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)。零(ling)件(jian)(jian)加工(gong)(gong)程序故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)也屬于軟件(jian)(jian)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)。嚴重的(de)(de)軟件(jian)(jian)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)則(ze)是(shi)數控(kong)(kong)(kong)系(xi)統軟件(jian)(jian)的(de)(de)缺損甚(shen)(shen)至(zhi)丟失，這就只有與生(sheng)產廠商或(huo)其(qi)服務機構聯系(xi)解決了。

西門子PCU50-840D系統常見故障：
開機黑屏、白屏;啟動不正常；死機無反應；供電不顯示；無法正常進入加工界面；H1、H2 的7段碼顯示“28”“69”“88”等。
故障現象：
840D數控系統機床，的PCU50.3重新啟動時，計算機不能正常啟動，上電后數碼管顯示88 ，兩燈同時顯示紅色
故障分析：
PCU無法啟動故障，說明內部調用時出現了問題。
故障排除方法：
1.重新啟動試機；
2．檢查外圍接口線路是否有松動或接觸不良；
3.檢查供電單元，正常輸入電壓是+24vdc；
4.打開PCU50.3單元，將PCU 后蓋打開，檢查內存條是否插牢靠，扁平電纜插接是否可靠； 
5.如果仍未檢查出故障，檢查西門子840D 的軟件系統HMI advanced，可以將以前備份好的系統備份重新鏡像到一個新的硬盤上做實驗。
6.后可以判(pan)斷PCU50.3的主(zhu)板損壞，此時需要(yao)廠家(jia)或專業維修公司(si)進行(xing)維修。