FD3015VL;
FD3015VL現貨；
FD3015VL供應。
①PLC工作可靠，出現故障的情況不多，這大大減輕了維修的工作量。這在講述PLC的第三個特點時，還將進一步介紹。

②即使PLC出現故障，維修也很方便。這是因為PLC都設有很多故障提示信號，如PLC支持內存保持數據的電池電壓不足，相應的就有電壓低信號指示。而且，PLC本身還可作故障情況記錄。所以，PLC出了故障，很易診斷。同時，診斷出故障后排故也很簡單?？砂茨�塊排故，而模塊的備件市場可以買到，進行簡單的更換就可以。至于軟件，調試好后不會出故障，再多只要依據使用經驗進行調整，使之完善就是了。


　　1) 若要人不知，除非己莫為。(枚乘《上書諫吳王》)
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