1747-M15
1747-M15
1747-M15
3.4用于數(shù)據(jù)采集
隨著PLC技術(shù)的發(fā)展，其數(shù)據(jù)存儲區(qū)越來越大。如德維森公司的PLC，其數(shù)據(jù)存儲區(qū)（DM區(qū)）可達到9999個字。這樣龐大的數(shù)據(jù)存儲區(qū)，可以存儲大量數(shù)據(jù)。
數(shù)據(jù)采集可以用計數(shù)器，累計記錄采集到的脈沖數(shù)，并定時地轉(zhuǎn)存到DM區(qū)中去。
數(shù)據(jù)采集也可用A/D單元，當(dāng)模擬量轉(zhuǎn)換成數(shù)字量后，再定時地轉(zhuǎn)存到DM區(qū)中去。
PLC還可配置上小型打印機，定期把DM區(qū)的數(shù)據(jù)打出來。
PLC也可與計算機通訊，由計算機把DM區(qū)的數(shù)據(jù)讀出，并由計算機再對這些數(shù)據(jù)作處理。這時，PLC即成為計算機的數(shù)據(jù)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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