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ljc2008
一學(xué)到老
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樓主  發(fā)表于: 2009-07-23 16:38
一只1000P的編碼器,覺(jué)得精度不夠,有個(gè)工程師說(shuō)可以倍頻,我想請教下三菱編程中,如何倍頻為4000p的?謝謝`
回憶依然最美
一不小心混進(jìn)社會(huì ), 浪子回頭已經(jīng)白費... ...
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1樓  發(fā)表于: 2009-07-23 19:39
可以肯定地說(shuō)只用FX CPU本身不可能實(shí)現樓主想要的功能,能不能實(shí)現4倍頻咱先不說(shuō),FX的高速計數器的最高響應頻率為30KHZ,樓主可以算一下要是4倍頻計數的最高頻率是否超出了CPU硬件高速計數器的最高響應頻率。如果用FX2N PLC來(lái)做的話(huà)可以安裝一塊FX2N-1HC高速計數模塊來(lái)做,可以實(shí)現樓主所要的功能,它可以實(shí)現單倍頻計數,雙倍頻計數和4倍頻計數。樓主也可以用S7-200 CPU224XP PLC,不需要加裝任何模塊就可以實(shí)現4倍頻計數。
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