1 導言
可編程操控器是專門為工業(yè)操控規(guī)劃的，在規(guī)劃和制作進程中廠家采納了多層次抗攪擾辦法，使體系能在惡劣的工業(yè)環(huán)境下與強電設備一同作業(yè)。運轉的安穩(wěn)性和牢靠性很高，plc整機均勻無毛病作業(yè)時刻高達幾萬小時。跟著計算機技能的開展，plc的功用也越來越強，運用越來越便利，因而在工業(yè)操控體系中運用日益廣泛�？墒牵麢C的牢靠性高僅僅保證體系牢靠作業(yè)的前提，還有必要在規(guī)劃和設備plc體系進程中選用相應的辦法，才干保證體系牢靠作業(yè)。這篇文章首要論述在規(guī)劃和設備plc體系進程中的攪擾辦法。
2 plc體系的根本構成結構
可編程操控器硬件體系由plc主機、功用i/o單元和外部設備構成，如圖1所示。其間plc主機由cpu、存儲器、根本i/o模塊、i/o拓展接口、外設接口和電源等有些構成，各有些之間由內部體系總線銜接。
3 plc體系規(guī)劃時的抗攪擾辦法
3.1 硬件辦法
（1） 屏蔽：對電源變壓器、中央處理器、編程器等首要部件，選用導電、導磁性杰出的資料進行屏蔽處理，以防止外界攪擾信號的影響。
（2） 濾波：對供電體系計輸入線路選用多種形式的濾波處理，以消除和按捺高頻攪擾信號，也削弱了個模塊間的相互影響。
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