1746-A10
1746-A10
1746-A10
當然，A值越大越好，它可使PLC系統(tǒng)得到充分的利用，是為什么要使用PLC的重要指標。而從上式可知，MTBF越大，MTTR越小，則A越大。所以，PLC的可靠措施都是圍繞提高MTBF及MTTR值進行的。
鑒于可靠工作是PLC的重要特點，至關(guān)重要，故有關(guān)提高MTBF及降低MTTR的措施如何，以及PLC的MTBF與MTTR值也成為PLC性能的重要指標。
8經(jīng)濟指標
以上七條講的都是PLC的技術(shù)性能。其實，使用PLC，還要考慮經(jīng)濟指標。經(jīng)濟是基礎(chǔ)，經(jīng)濟上不合算，不能帶來經(jīng)濟效益，使用PLC也就沒有基礎(chǔ)。所以，這個指標也是重要的。經(jīng)濟指標zui簡單的就是看價格。一般講，同樣技術(shù)性能的PLC，價格低其經(jīng)濟指標就好
現(xiàn)貨，現(xiàn)貨，降降降，火火火，火火火……
現(xiàn)貨，現(xiàn)貨，降降降，火火火，火火火……
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