我們的體會是,ControlLogix雙CPU冗余控制的軟件方式實現(xiàn)是一種經(jīng)濟、有效的方法,它成本支出不大,卻能使系統(tǒng)的可靠性大大提高。
另外,雙CPU冗余控制時,如何利用Map命令,只將具有主控制權的CPU數(shù)據(jù)通過ControlNet網(wǎng)傳送給其他控制設備,是值得進一步研究的。
PLC診斷軋鋼生產(chǎn)設備故障的基本原理
軋鋼設備的故障信號有數(shù)字量和模擬量之分,PLC采用不同的方法對這兩種信號對應的故障進行診斷。
基于數(shù)字量信號的故障診斷
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