2711-B5A9L2
2711-B5A9L2PLC的工作原理如下：
PLC是由CPU、內存、輸入/輸出模塊和通信模塊等組成的係統。在PLC係統中，通常包括輸入模塊和輸出模塊。輸入模塊負責將各種傳感器和開關信號轉換成數字信號並輸入到CPU中。輸出模塊負責接收CPU輸出的指令，並將其轉換成所需的控制信號並輸出到執行器中。
PLC係統的工作流程如下：
1. 在開始工作時，PLC讀取輸入信號。
2. CPU對應程序根據預設的邏輯，處理輸入信號並輸出所需的指令，將其傳遞給輸出模塊。
3. 輸出模塊將輸出信號轉換成控制信號，並將其輸出到執行器中。
2711-B5A9L2
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