IC693PWR332
IC693PWR332
IC693PWR332
隧道掘進設備是一種存在振動的移動設備,它工作時會產生高溫、高濕、高塵、高電磁干擾,幾乎所有對自動控制系統(tǒng)不利的工作條件在隧道掘進設備中都存在,許多廠商的自動化元件在隧道掘進設備中應用時都或多或少發(fā)生過誤動作,三菱電機的CC-Link通信網絡和Q系列PLC在隧道掘進設備應用時還沒有發(fā)現(xiàn)誤動作,最近的一次實例是用于地鐵二號線古北路站至中山公園站區(qū)間隧道施工的隧道掘進設備。該隧道掘進設備自動控制系統(tǒng)具有如下二個特點:
①PLC輸入輸出點數多,開關量近1000點、模擬量100點以上。
②PLC站間通信采用通信網絡,PLC系統(tǒng)一次設計、分步實施,主PLC、1#PLC、2#PLC、3#PLC為基本PLC,4#PLC、5#PLC、6#PLC為擴展PLC,根據工程需要選用。
1、CC-Link通信網絡的結構
CC-Link通信網絡的結構如下圖所示:主PLC為CC-Link網絡控制PLC、1#PLC、2#PLC、3#PLC掛在CC-Link上組成隧道掘進設備分區(qū)域集散控制系統(tǒng),承擔隧道掘進設備的基本控制任務;4#PLC、5#PLC、6#PLC是隧道掘進設備自動控制系統(tǒng)的擴展部分,承擔可以獨立運行的單體設備的控制任務,它們根據需要掛上CC-Link通信網絡。
1#PLC接受主PLC的操作指令,接受主PLC、2#PLC、3#PLC送到CC-Link通信網絡上的開關量信號和模擬量信號,控制隧道掘進設備2#臺車與3#臺車的設備,向CC-Link通信網絡上傳2#臺車與3#臺車的開關量信號和模擬量信號。共有DI128點、DO64點、AI8點,采用三菱電機的Q系列PLC。
2#PLC接受主PLC的操作指令,接受主PLC、1#PLC、3#PLC送到CC-Link通信網絡上的開關量信號和模擬量信號,控制隧道掘進設備4#臺車與5#臺車的設備,向CC-Link通信網絡上傳4#臺車與5#臺車的開關量信號和模擬量信號。共有DI64點、DO32點、AI8點,采用三菱電機的Q系列PLC。
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