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ydp
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樓主  發(fā)表于: 2010-05-22 22:15
我正開(kāi)發(fā)一種毒刺猬單片電路，有人對PLC解密時(shí)就向電腦側供24伏或更高的高頻電壓，但不傷PLC。我把這毒刺猬單片電路內置在PLC里面。
fsdyc
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1樓  發(fā)表于: 2010-05-27 15:14
引用
引用第6樓tanghanshui于2010-05-23 15:44發(fā)表的  :
國外的機器一般不加密    他們的優(yōu)勢在于制造技術(shù)上



你錯了！美國格蘭克公司的機器賣(mài)給中國都是必須加密的。特別是“雙牽引”。他從來(lái)不會(huì )把程序給人，機械圖紙便是可以給客戶(hù)。

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