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90人在江湖
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樓主  發(fā)表于: 2018-12-24 19:11
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各位前輩好 ,小弟現在使用三菱L系列PLC通過(guò)LJ71C24-R2模塊使用無(wú)協(xié)議通訊方式和一臺儀表通訊,現在在通訊過(guò)程出現了一些異常,造成指令EVAL運算異常,造成PLC報警,現在為了正常使用,小弟現在使用指令WTOB將需要進(jìn)行換算的存儲器的值分開(kāi),單獨進(jìn)行約束,請問(wèn)前輩們還有其他更好的方法嗎,
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1樓  發(fā)表于: 2018-12-24 20:44
緩存區的值是外圍設備發(fā)貨來(lái)的值,如果滿(mǎn)足接收條件,INPUT指令接通,再把緩存區的值讀進(jìn)D里面,如果不滿(mǎn)足或不正確值會(huì )踢掉,如果只看緩存區的值有可能的值并不是正確的值,你只需看D就行了
Rules are always made by the strong, and history is always written by the winners.
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2樓  發(fā)表于: 2018-12-24 21:52
樓主,你用WTOB是可以的,又或者用G.CPPRTL這個(gè),設置好報文格式,直接轉化為數值
具體參考手冊
Rules are always made by the strong, and history is always written by the winners.

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