某些干擾是可以預知的,如PLC的輸出命令使執行機構(如大功率電動機、電磁鐵)動作,常常會伴隨產生火花、電弧等干擾信號,它們產生的干擾信號可能使PLC接收錯誤的信息。在容易產生這些干擾的時間內,可用軟件*PLC的某些輸入信號,在干擾易發期過去后,再取消*。
采用冗余系統或熱備用系統
某些控制系統(如化工、造紙、冶金、核電站等)要求有極高的可靠性,如果控制系統出現故障,由此引起停產或設備損壞將造成極大的經濟損失。因此,僅僅通過提高PLC控制系統的自身可靠性是滿足不了要求。在這種要求極高可靠性的大型系統中,常采用冗余系統或熱備用系統來有效地解決上述問題。
聯系人:黃曉飛(銷售工程師)
移動電話:18030263579
固話:0592-6895320
QQ:2472574325
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