1747-M15
1747-M15
1747-M15
3.4用于數據采集
隨著PLC技術的發展，其數據存儲區越來越大。如德維森公司的PLC，其數據存儲區（DM區）可達到9999個字。這樣龐大的數據存儲區，可以存儲大量數據。
數據采集可以用計數器，累計記錄采集到的脈沖數，并定時地轉存到DM區中去。
數據采集也可用A/D單元，當模擬量轉換成數字量后，再定時地轉存到DM區中去。
PLC還可配置上小型打印機，定期把DM區的數據打出來。
PLC也可與計算機通訊，由計算機把DM區的數據讀出，并由計算機再對這些數據作處理。這時，PLC即成為計算機的數據終端。
備貨，備貨，降降降，火火火，火火火……
備貨，備貨，降降降，火火火，火火火……
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