西(xi)門子840D NCU上(shang)的PLC指(zhi)示燈閃通訊不(bu)上(shang)，報(bao)警120202維(wei)修(xiu)，840D故(gu)障210201故障維(wei)修(xiu)，西(xi)門(men)子PLC不(bu)開機(ji)燈不(bu)亮維(wei)修(xiu)，840D不(bu)啟(qi)動(dong)維(wei)修(xiu)，西(xi)門(men)子NCU無(wu)顯(xian)示燈也(ye)不亮維(wei)修(xiu)，NCU主(zhu)板(ban)芯(xin)片壞(huai)維(wei)修(xiu)，西(xi)門(men)子NCU不(bu)能(neng)總(zong)清維(wei)修(xiu)，NCU傳(chuan)送(song)數據(ju)報(bao)錯(cuo)，NCU數碼(ma)管(guan)顯(xian)示3主(zhu)板(ban)問題，NCU開(kai)機顯(xian)示1不(bu)走(zou)維(wei)修(xiu)，NCU啟(qi)動(dong)數碼(ma)管(guan)亮8閃問(wen)題，2排(pai)燈全(quan)亮故(gu)障，NCU關電(dian)掉(diao)數據(ju)程序(xu)，NCU通訊鏈(lian)接(jie)不上(shang)維(wei)修(xiu)，西(xi)門(men)子840D NCU經(jing)常(chang)出現(xian)的故障為(wei)上(shang)電(dian)之(zhi)後數(shu)碼(ma)管(guan)無(wu)顯(xian)示，數(shu)碼(ma)管(guan)顯(xian)示“1”,數(shu)碼(ma)管(guan)顯(xian)示“3”，數(shu)碼(ma)管(guan)顯(xian)示“8”，數(shu)碼(ma)管(guan)走(zou)“106”和(he)“109”等(deng)。如(ru)果NCU出現(xian)上(shang)述報(bao)警均(jun)屬於(yu)NCU有(you)故(gu)障，NCU正常(chang)狀(zhuang)態(tai)為(wei)數(shu)碼(ma)管(guan)顯(xian)示“6”和(he)兩個綠(lv)燈亮才(cai)屬正常(chang)。西門(men)子840D系(xi)統通訊網(wang)絡故障及排(pai)除(chu)方(fang)法(fa)，SIEMENS 840D 數控系(xi)統(tong)的“2001 PLC has not start up” 和(he)“120202、120201 waiting for a connection to the NC/PLC”報(bao)警是(shi)通訊網(wang)絡的故(gu)障，排(pai)除(chu)過(guo)程涉(she)及軟(ruan)、硬件。，2001PLC未啟(qi)動(dong)，PF燈亮維(wei)修(xiu)，PS亮紅燈維(wei)修(xiu)，NC停(ting)止維(wei)修(xiu)，2001PLC沒啟(qi)動(dong)，通道(dao)中(zhong)斷維(wei)修(xiu)，2120NCK風(feng)扇報(bao)警，DP通訊故(gu)障，X軸(zhou)故(gu)障，Y軸(zhou)不(bu)工(gong)作，Z軸(zhou)無(wu)使能(neng)，系(xi)統報(bao)380500，30021,31885,30020,7930,f07016,702844維(wei)修(xiu)，故(gu)障207841代碼(ma)，不(bu)能(neng)正常(chang)工(gong)作，不穩定，故(gu)障230027，F07901故障維(wei)修(xiu)，F31135維(wei)修(xiu)，F30005故(gu)障維(wei)修(xiu)，F30004故(gu)障維(wei)修(xiu)，F30021故(gu)障維(wei)修(xiu)，F230004代碼(ma)，F020005故(gu)障，F07935故障，F01036，功(gong)率單元(yuan)接(jie)地故(gu)障,230021,230005維(wei)修(xiu)，功(gong)率部件故(gu)障維(wei)修(xiu)。  西(xi)門(men)子840D NCU上(shang)的PLC指(zhi)示燈閃通訊不(bu)上(shang)