Modbus_rtu源码
unsigned char addrlh_217; //寄存器地址次低字符
unsigned char addrll_217; //最低字符
unsigned char addrl_217; //寄存器地址
unsigned char datahh_217; //要预置的状态最高字符
unsigned char datahl_217; //要预置的状态次高字符
unsigned char datah_217; //转换为的10进制数
unsigned char datalh_217; //要预置的状态的次低字符
unsigned char datall_217; //要预置的状态的最低字符
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