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vir智能
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樓主  發(fā)表于: 2017-12-06 10:35
用X0做為驅動(dòng)條件，當輸入頻率達到1000時(shí)，PLC就接受不到了，可說(shuō)明書(shū)上高速輸入接收頻率可以達到200K，作為普通輸入時(shí)最高能接收頻率達到多少？
zhangqi_1234
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1樓  發(fā)表于: 2017-12-06 21:13
一種是軟件方法：使用高速計數器。修改端口的濾波常數，使用立即刷新指令（降低了抗干擾能力）。X0端口高速計數器的最高理論響應頻率是50KHz，但往往達不到。另一種是硬件方法：使用高速計數模塊。
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