隨著微電子技術(shù)、計算機技術(shù)及數(shù)字控制技術(shù)的高速發(fā)展,到80年代末,PLC技術(shù)已經(jīng)很成熟,并從開關量邏輯控制擴展到計算機數(shù)字控制 (CNC) 等領域。近年生產(chǎn)的PLC在處理速度、控制功能、通信能力等方面均有新的突破,并向電氣控制、儀表控制、計算機控制一體化方向發(fā)展,性能價格比不斷提高,成為了工業(yè)自動化的支柱之一。這時候的可編程控制器的功能已不限于邏輯運算,具有了連續(xù)模擬量處理、高速計數(shù)、遠程輸入和輸出和網(wǎng)絡通信等功能。電工委員會(IEC)將可編程邏輯控制器改稱為可編程控制器PC(Programmable Controller)。后來由于發(fā)現(xiàn)其簡寫與個人計算機(Personal Computer)相同,所以又重新沿用PLC的簡稱。
IC697PWR720 GE Fanuc 90-70 IC697PWR720 is a single-slot module that plugs into the power supply slot, which is the leftmost slot in an IC697 rack. GE Fanuc 90-70 must be connected to an external power supply through a cable. GE Fanuc 90-70 monitors the +5 volt output and the TTL compatible Input Power OK signal (TTL) from the external power supply.
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