140CPU43412U

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描述

140CPU43412U

PLC的硬件故障較為直觀地就能發(fā)現(xiàn),維修的基本方法就是更換模塊。根據(jù)故障指示燈和故障現(xiàn)象判斷故障模塊是檢修的關(guān)鍵,盲目的更換會帶來不必要的損失。
? ? (1)電源模塊故障。
? ? 一個工作正常的電源模塊,其上面的工作指示燈如“AC”、“24VDC”、“5VDC”、“BATT”等應該是綠色長亮的,哪一個燈的顏色發(fā)生了變化或閃爍或熄滅就表示那一部分的電源有問題?!癆C”燈表示PLC的交流總電源,“AC”燈不亮時多半無工作電源,整個PLC停止。這時就應該檢查電源保險絲是否熔斷,更換熔絲是應用同規(guī)格同型號的保險絲,無同型號的進口熔絲時要用電流相同的快速熔絲代替。如重復燒保險絲說明電路板短路或損壞,更換整個電源。“5VDC”、“24VDC”燈熄滅表示無相應的直流電源輸出,當電源偏差超出正常值5%時指示燈閃爍,此時雖然PLC仍能工作,但應引起重視,必要時停機檢修。“BATT”變色燈是后備電源指示燈,綠色正常,黃色電量低,紅色故障。黃燈亮時就應該更換后備電池,手冊規(guī)定兩到三年更換鋰電池一次,當紅燈亮時表示后備電源系統(tǒng)故障,也需要更換整個模塊。
? ? (2)I/O模塊故障。
? ? 輸入模塊一般由光電耦合電路組成;輸出模塊根據(jù)型號不同有繼電輸出、晶體管輸出、光電輸出等。每一點輸入輸出都有相應的發(fā)光二極管指示。有輸入信號但該點不亮或確定有輸出但輸出燈不亮時就應該懷疑I/O模塊有故障。輸入和輸出模塊有6到24個點,如果只是因為一個點的損壞就更換整個模塊在經(jīng)濟上不合算。通常的做法是找備用點替代,然后在程序中更改相應的地址。但要注意,程序較大是查找具體地址有困難。特別強調(diào)的是,無論是更換輸入模塊還是更換輸出模塊,都要在PLC斷電的情況下進行,S5帶電插拔模塊是絕對不允許的。
? ? (3)CPU模塊故障。
? ? 通用型S5PLC的CPU模塊上往往包括有通信接口、EPROM插槽、運行開關(guān)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(guān)撥到RUN狀態(tài),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。

產(chǎn)品承諾:
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保?證?安全準時發(fā)貨,
保?證售后服務質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門子,摩托羅拉,安川。力士樂。ACSO,橫河等進口品牌。 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家

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15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家


選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學習編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關(guān)系理順;
3、進而練習整數(shù)運算、實數(shù)運算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學會一種至于其它的學習起來也就簡單了。