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公司基本資料信息
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FINCOR 106116101DCS系統(tǒng)
AB,Schneider,Motoman,,Triconex,,Yaskawa,,F(xiàn)oxboro,F(xiàn)anuc,,ABB,GE,Honeywell,。Westinghouse,Siemens,Bosch Rexroth,KUKA......等等;所有備品備件均提供一年的質(zhì)量*證,,并且都經(jīng)過了嚴(yán)格的測試和認(rèn)證,。
主營產(chǎn)品:PLC模塊,DCS備品備件,,機器人備件,,伺服器,觸摸屏,,輸入輸出模塊,,變頻器,電機......
本公司所經(jīng)營商品均是原裝正品,,質(zhì)量*證,,大量現(xiàn)貨*價,數(shù)字量輸入模塊,,嵌入式模塊價錢美麗,,具體型號和價錢歡迎咨詢,!為客戶提供性價比優(yōu)越的產(chǎn)品和方案以及全面的服務(wù),,降低客戶成本,用心服務(wù),,誠信經(jīng)營,!購買請詢價,一切產(chǎn)品以詢價為主!
PLC系統(tǒng)故障分類和故障診斷
故障的分類
1.外部設(shè)備故障
外部設(shè)備就是與實際過程直接聯(lián)系的各種開關(guān),、傳感器,、執(zhí)行機構(gòu)、負(fù)載等,。這部分設(shè)備發(fā)生故障,,直接影響系統(tǒng)的控制功能。
2.系統(tǒng)故障
這是影響系統(tǒng)運行的全局性故障,。系統(tǒng)故障可分為固定性故障和偶然性故障,。
故障發(fā)生后,可重新啟動使系統(tǒng)恢復(fù)正常,,則可認(rèn)為是偶然性故障,。
重新啟動不能恢復(fù)而需要更換硬件或軟件,系統(tǒng)才能恢復(fù)正常,,則可認(rèn)為是固定故障,。
3.硬件故障
這類故障主要指系統(tǒng)中的模板(特別是I/O模板)損壞而造成的故障。這類故障一般比較明顯,,影響局部,。
4.軟件故障
軟件本身所包含的錯誤,主要是軟件設(shè)計考慮不周,,在執(zhí)行中一旦條件滿足就會引發(fā),。在實際工程應(yīng)用中,由于軟件工作復(fù)雜,、工作量大,,因此軟件錯誤幾乎難以避免。
對于可編程控制器組成的控制系統(tǒng)而言,,絕大部分故障屬于上述四類故障,。根據(jù)這一故障分類,可以幫助分析故障發(fā)生的部位和產(chǎn)生的原因,。
可編程控制器的自診斷測試
可編程序控制器具有極強的自診斷測試功能,,在系統(tǒng)發(fā)生故障時要充分利用這一功能。在進行自診斷測試時,,都要使用診斷調(diào)試工具,,也就是編程器。
利用系統(tǒng)功能進行診斷測試
利用可編程控制器本身所具有的各種功能,,自行編制軟件,、采取一定措施、結(jié)合具體分析確定故障原因,。
用戶通過程序可以編輯組織塊,,來告訴CPU當(dāng)出現(xiàn)故障時應(yīng)如何處理,,
如果相應(yīng)的故障組織塊OB沒有編程,當(dāng)出現(xiàn)該故障時,,CPU轉(zhuǎn)到“STOP”狀態(tài),。
PLC通訊方法分析
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