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已經知道的
   字符   0           1           2        3          4         5          6          7          8        9        A         B          C          D          E        F
  
ASCII碼 H30     H31      H32   H33    H34     H35    H36    H37     H38   H39    H41    H42     H43     H44    H45   H46



                    ENQ       變頻器站號  指令代碼    等待時間       數據       總和校驗  

字符                  00                 FA                                               02                      49

ASCII碼    H05          H30 H30       H46 H41                                  H30   H32         H34  H49
                                      

這行不明白                  H30+H30+H46+H41+H30+H32
                                    =H149

請問               H30+H30+H46+H41+H30+H32=H149用哪個方式加得到H149請高手詳細解答 謝謝！  

有道理，不能用十進制加法直接算