咨詢熱線－－-17750626260
PLC的掃描工作方式與電器控制的工作原理明顯不同。電器控制裝置采用硬邏輯的并行工作方式，如果某個繼電器的線圈通電或斷電，那么該繼電器的所有常開和常閉觸點不論處在控制線路的哪個位置上，都會立即同時動作；而PLC采用掃描工作方式（串行工作方式），如果某個軟繼電器的線圈被接通或斷開，其所有的觸點不會立即動作，必須等掃描到該時才會動作。但由于PLC的掃描速度快，通常PLC與電器控制裝置在I/O的處理結果上并沒有什么差別。

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廈門莫格電氣自動化有限公司

張芳（銷售工程師）

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