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產(chǎn)品簡介

CC-GDIL21 51306319-175
1可靠性高，抗*力強

2通用性強，使用方便

3采用模塊化結(jié)構(gòu)，系統(tǒng)組合靈活方便

4編程語言簡單、易學(xué)，便于掌握

5系統(tǒng)設(shè)計周期短

6對生產(chǎn)工藝以身試法適應(yīng)性強

7安裝簡單、調(diào)試方便、維護工作量小

詳細介紹

CC-GDIL21 51306319-175

：祖巧麗

：

PLC系統(tǒng)的模擬量是一個變動很大的不穩(wěn)定的值，可能是如下原因：

你可能使用了一個自供電或隔離的傳感器電源，兩個電源沒有彼此連接，即模擬量輸入模塊的電源地和傳感器的信號地沒有連接。這將會產(chǎn)生一個很高的上下振動的共模電壓，影響模擬量輸入值。

另一個原因可能是模擬量輸入模塊接線太長或絕緣不好。
可以用如下方法解決：

1）連接傳感器輸入的負端與模塊上的公共M 端以補償此種波動。（但要注意確保這是兩個電源系統(tǒng)之間的*。）

背景是：

模擬量輸入模塊內(nèi)部是不隔離的；

共模電壓不應(yīng)大于 12V；

對于60Hz干擾信號的共模抑制比為40dB。

2）使用模擬量輸入濾波器。

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