D100ED20;
D100ED20現貨；
D100ED20供應。

數據采集



隨著PLC技術的發展，其數據存儲區越來越大。如OMRON公司的PLC，前期產品C60P的DM區僅64個字，而后來的C60H達到1000個字；到了CQMI可多達6000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。



電業部門曾這么使用PLC，用以實時記錄用戶用電情況，以實現不同用電時間、不同計價的收費辦法，鼓勵用戶在用電低谷時多用電，達到合理用電與節約用電的目的。




　　20、為天地立心，為生民立命，為往圣繼絕學，為萬世開太平。---張載
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