140ACO02000C
140ACO02000C
PLC在每次掃描工作過(guò)程中除了執(zhí)行用戶程序外,還要完成內(nèi)部處理、輸入采樣、通信服務(wù)、程序執(zhí)行、自診斷、輸出刷新等工作。PLC工作的全過(guò)程包括三個(gè)部分,即上電處理、掃描過(guò)程和出錯(cuò)處理。PLC工作的全過(guò)程可用圖4所示的運(yùn)行框圖來(lái)表示。
PLC通電后,CPU在系統(tǒng)程序的控制下*行內(nèi)部處理,包括硬件初始化、I/O模塊配置檢查、停電保持范圍設(shè)定及其他初始化處理等工作。
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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◆ 企業(yè)名稱:廈門泰尼電氣有限公司
◆ : 小廖(女士)
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