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樓主  發(fā)表于: 2018-06-22 09:51
西門(mén)子S7-300  PLC的profinet設備掉線(xiàn)或者分布式IO設備（以太網(wǎng)）掉線(xiàn)，怎么通過(guò)編程檢測到掉線(xiàn)？
應該在哪個(gè)OB塊里編程？
最好有實(shí)際例子說(shuō)明下，謝謝
luwenhua1985
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1樓  發(fā)表于: 2018-06-22 10:08
博途里有個(gè)診斷函數的
DeviceStates： 讀取 IO 系統的模塊狀態(tài)信息 S7-1200, S7-1500    
詞匯表
轉換程序狀態(tài)的顯示格式
說(shuō)明

指令“DeviceStates”用于查詢(xún) IO 系統中所有模塊的特定狀態(tài)信息，即：

PROFINET IO 系統中所有 IO 設備的狀態(tài)信息

或 DP 主站系統中所有 DP 從站的狀態(tài)信息

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