廠商性質：經銷商

所在地：上海市

更新時間：2024-06-11

產品簡介：

西門子S7-1500通訊模塊上電不能開機；分析處理

1.CPU模(mo)塊(kuai)故障。

       通用型S5 PLC的CPU模塊上往往包括有通信接口、EPROM插槽、運行開關等，故障的隱蔽性更大，因為更換CPU模塊的費用很大，所以對它的故障分析、判斷要尤為仔細。

       檢修實例：一臺PLC合上電源時無法將開關撥到RUN狀態，錯誤指示燈先閃爍后常亮，斷電復位后故障依舊，更換CPU模塊后運行正常。在進行芯片級維修時更換了CPU但故障燈仍然不停閃爍，至到更換了通信借口板后功能才恢復正常。

2.電源模(mo)塊故(gu)障。

       一(yi)個(ge)(ge)工(gong)作(zuo)(zuo)正常(chang)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源模(mo)塊，其上面的(de)(de)(de)工(gong)作(zuo)(zuo)指(zhi)示(shi)(shi)燈(deng)如(ru)“AC"、“24VDC"、“5VDC"、“BATT"等應該(gai)是(shi)綠(lv)色長亮(liang)的(de)(de)(de)，哪一(yi)個(ge)(ge)燈(deng)的(de)(de)(de)顏色發(fa)生了變化或閃(shan)爍(shuo)或熄滅(mie)就(jiu)(jiu)表示(shi)(shi)那一(yi)部分的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源有問題(ti)。“AC"燈(deng)表示(shi)(shi)PLC的(de)(de)(de)交流(liu)總電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源，“AC"燈(deng)不亮(liang)時(shi)多半無工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源，整個(ge)(ge)PLC停止。這時(shi)就(jiu)(jiu)應該(gai)檢查電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源保險絲是(shi)否熔斷，更(geng)換(huan)(huan)熔絲是(shi)應用同(tong)規格同(tong)型(xing)號(hao)的(de)(de)(de)保險絲，無同(tong)型(xing)號(hao)的(de)(de)(de)進(jin)口熔絲時(shi)要(yao)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)相同(tong)的(de)(de)(de)快速熔絲代替。如(ru)重(zhong)復燒保險絲說明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)板短路(lu)(lu)或損壞，更(geng)換(huan)(huan)整個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源。“5VDC"、“24VDC"燈(deng)熄滅(mie)表示(shi)(shi)無相應的(de)(de)(de)直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源輸(shu)出，當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源偏差(cha)超出正常(chang)值5%時(shi)指(zhi)示(shi)(shi)燈(deng)閃(shan)爍(shuo)，此(ci)時(shi)雖(sui)然PLC仍能工(gong)作(zuo)(zuo)，但應引起(qi)重(zhong)視，必要(yao)時(shi)停機檢修。“BATT"變色燈(deng)是(shi)后(hou)備電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源指(zhi)示(shi)(shi)燈(deng)，綠(lv)色正常(chang)，黃色電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)量低，紅色故障(zhang)(zhang)。黃燈(deng)亮(liang)時(shi)就(jiu)(jiu)應該(gai)更(geng)換(huan)(huan)后(hou)備電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池，手冊規定兩到三年更(geng)換(huan)(huan)鋰(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池一(yi)次(ci)，當紅燈(deng)亮(liang)時(shi)表示(shi)(shi)后(hou)備電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源系統故障(zhang)(zhang)，也需要(yao)更(geng)換(huan)(huan)整個(ge)(ge)模(mo)塊。

       輸(shu)入(ru)模(mo)塊一(yi)般由光(guang)電耦合電路組成；輸(shu)出(chu)模(mo)塊根據(ju)型號不(bu)同有繼電輸(shu)出(chu)、晶體(ti)(ti)管輸(shu)出(chu)、光(guang)電輸(shu)出(chu)等。每(mei)一(yi)點輸(shu)入(ru)輸(shu)出(chu)都(dou)有相應的(de)(de)發光(guang)二(er)極管指(zhi)示。有輸(shu)入(ru)信號但該點不(bu)亮或確(que)定有輸(shu)出(chu)但輸(shu)出(chu)燈不(bu)亮時就應該懷疑(yi)I/O模(mo)塊有故障。輸(shu)入(ru)和輸(shu)出(chu)模(mo)塊有6到24個點，如果只(zhi)是因為一(yi)個點的(de)(de)損(sun)壞就更換(huan)(huan)整個模(mo)塊在經濟上不(bu)合算(suan)。通常的(de)(de)做(zuo)法是找備用點替(ti)代，然后(hou)在程序中(zhong)更改相應的(de)(de)地址。但要注意，程序較大(da)是查(cha)找具體(ti)(ti)地址有困難。特別強調的(de)(de)是，無論是更換(huan)(huan)輸(shu)入(ru)模(mo)塊還是更換(huan)(huan)輸(shu)出(chu)模(mo)塊，都(dou)要在PLC斷電的(de)(de)情況下(xia)進(jin)行(xing)，S5帶電插拔模(mo)塊是絕對不(bu)允許的(de)(de)。

西門子S7-1500通訊模塊上電不能開機；維修故障包括：

       S7-1500通電無顯示維修，西門子PLC模塊燈點不亮維修，西門子PLC400全部燈閃維修，西門子300PLC模塊CPU不啟動維修，PLC自檢通不過維修，PLC通訊維修，PLC電源燒維修，PLC輸出點壞維修，PLC輸入點壞維修，西門子PLC復位開關壞維修，西門子PLC主板維修，PLC電源板維修，CPU模塊維修，PLC414-3啟動所有指示燈都亮，CPU亮紅燈故障，PLC416指示燈全閃，S7400 CPU燈全閃PLC電源維修，PLC400所有燈同時閃爍，