咨詢熱線－－-17750626260

當PLC運行時，是通過執(zhí)行反映控制要求的用戶程序來完成控制任務的，需要執(zhí)行眾多的操作，但CPU不可能同時去執(zhí)行多個操作，它只能按分時操作（串行工作）方式，每一次執(zhí)行一個操作，按順序逐個執(zhí)行。由于CPU的運算處理速度很快，所以從宏觀上來看，PLC外部出現(xiàn)的結果似乎是同時（并行）完成的。這種串行工作過程稱為PLC的掃描工作方式。

用掃描工作方式執(zhí)行用戶程序時，掃描是從條程序開始，在無中斷或跳轉控制的情況下，按程序存儲順序的先后，逐條執(zhí)行用戶程序，直到程序結束。然后再從頭開始掃描執(zhí)行，周而復始重復運行。

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【超大庫存】【當天付款】【順豐速運】【歡迎搶購】

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廈門莫格電氣自動化有限公司

張芳（銷售工程師）

電  話：/17750626260

Q    Q：177763184

郵  箱：177763184@qq.cm

傳  真：

網址：http://www.mogget.cn

誠信經營，質量為首，誠信至上，莫格電氣竭誠為您服務！

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