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lizhi9248
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樓主  發(fā)表于: 2007-10-04 11:00
我目前做了幾臺工控機，其中使用了三菱FX2N-4AD-TC溫度模塊讀取現場(chǎng)幾個(gè)點(diǎn)的溫度，因為用戶(hù)的閥站電源是220V交流電，對溫度信號干擾較大，造成溫度讀數亂跳不穩定，我本打算在溫度模塊的＋，－輸入端子之間加入0.1微法的無(wú)極性電容以便于過(guò)濾電磁干擾（不知可行），由于用戶(hù)所在地條件有限找不到該類(lèi)型電容，不知各位是否還有其他方法解決這個(gè)問(wèn)題。
xiugu
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1樓  發(fā)表于: 2007-11-08 20:45
如果干擾很?chē)乐�，取單存的取平均效果不好，可以根據工藝的特性，使用限幅，過(guò)濾掉不可信的數據，只平均有效數據，用PLC是可以實(shí)現的

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