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PLC communication source code

PPI电缆或自己焊接4、S7-200 PLC 默认参数即可5、默认一次最多读取100个VB字节或50个VW字,通过DLL函数修改,可以读取更多6、为了简化程序,仅提供V区操作,实际应用中足够了7、操作VW字时,地址应为偶数...


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