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廈門泰尼電氣有限公司
主營產(chǎn)品: AB模塊PLC |

![]() |
廈門泰尼電氣有限公司
主營產(chǎn)品: AB模塊PLC |
參考價 | 面議 |
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更新時間:2018-03-27 01:01:11瀏覽次數(shù):237
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140XTS00203***140XTS00203
140XTS00203***140XTS00203
三菱PLC輸入指示燈安裝于各自的輸入模塊上,用于指示PLC輸入信號的狀態(tài),當(dāng)設(shè)備的輸入發(fā)信時,對應(yīng)的指示燈亮。當(dāng)輸入發(fā)信時,(對應(yīng)PLC輸入端有信號輸入),如指示燈不亮,可能原因有:
采用匯點輸入(有源)時,因信號的接觸電阻太大或負(fù)載過重、短路引起PLC內(nèi)部電源電壓的降低、保護(hù),使得輸入電流不足以驅(qū)動PLC輸入接口電路;
:張亮(工程師) 專線:
24小時移動專線: 【】
采用源輸入(有源)時,因信號的接觸電阻太大或輸入信號的電壓過低,使得輸入電流不足以驅(qū)動PLC的輸入接口電路;
輸入端子的接觸不良或輸入連接線連接不良;
當(dāng)故障發(fā)生在擴展單元時,可能是基本單元與擴展單元間的連接不良;
PLC輸入接口電路損壞。
測量PLC輸入電壓、檢查模塊安裝與連接,在確認(rèn)正確后,更換輸入模塊或進(jìn)行輸入模塊的維修與處理。
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