{"id":27886,"date":"2024-04-28T23:37:20","date_gmt":"2024-04-28T15:37:20","guid":{"rendered":"https:\/\/www.modbus.cn\/?p=27886"},"modified":"2026-06-30T23:54:52","modified_gmt":"2026-06-30T15:54:52","slug":"modbus-ascii-shu-ju-bao-wen-jie-gou-xiang-jie","status":"publish","type":"post","link":"https:\/\/www.modbus.cn\/en\/27886.html","title":{"rendered":"Modbus ASCII\u6570\u636e\u62a5\u6587\u7ed3\u6784\u8be6\u89e3"},"content":{"rendered":"

Modbus ASCII\u662fModbus\u7684\u4e00\u79cd\u6d88\u606f\u5e27\uff0c\u76f8\u6bd4RTU\uff0cASCII\u7684\u4f20\u8f93\u662f\u6309\u7167\u5b57\u7b26\u4f20\u7684\uff0c\u4f20\u8f93\u7684\u6570\u636e\u91cf\u4f1a\u6bd4RTU\u66f4\u591a\uff0c\u6240\u4ee5\u6570\u636e\u91cf\u5927\u7684\u65f6\u5019\u4e00\u822c\u4f7f\u7528\u7684RTU\uff0c\u6570\u636e\u91cf\u5c0f\u7684\u65f6\u5019\u624d\u4f1a\u7528ASCII\uff0c\u7136\u540eASCII\u534f\u8bae\u5e27\u91cc\u9762\u6dfb\u52a0\u4e86\u8d77\u59cb\u548c\u7ed3\u675f\uff0c\u66f4\u6362\u4e86\u6821\u9a8c\u7b97\u6cd5\uff0c\u4e0b\u9762\u8be6\u7ec6\u4ecb\u7ecdASCII\u534f\u8bae<\/p>\n\n\n\n

\u5e27\u683c\u5f0f<\/h2>\n\n\n\n

Modbus ASCII \u6a21\u5f0f\u4e0b\u7684\u901a\u8baf\u5e27\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u540d\u79f0<\/th>\u957f\u5ea6 (\u5b57\u8282)<\/th>\u63cf\u8ff0<\/th><\/tr><\/thead>
Start<\/td>1<\/td>\u4ee5\u5192\u53f7 :<\/mark> \u5f00\u5934\uff0cASCII \u5341\u516d\u8fdb\u5236\u503c\u4e3a 3A<\/td><\/tr>
Address<\/td>2<\/td>\u5341\u516d\u8fdb\u5236\u8282\u70b9\u5730\u5740\uff0c\u5b57\u7b26\u8868\u793a<\/td><\/tr>
Function<\/td>2<\/td>\u5341\u516d\u8fdb\u5236\u529f\u80fd\u7801\uff0c\u5b57\u7b26\u8868\u793a<\/td><\/tr>
Data<\/td>n x 2<\/td>n \u662f\u6570\u636e\u5b57\u8282\u6570\uff0c\u5b83\u53d6\u51b3\u4e8e\u529f\u80fd\u7801<\/td><\/tr>
LRC<\/td>2<\/td>LRC\u5197\u4f59\u68c0\u9a8c\u7801<\/td><\/tr>
End<\/td>2<\/td>CR \/ LF<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u6ce8\uff1a\u5730\u5740\u3001\u529f\u80fd\u3001\u6570\u636e\u548c LRC \u90fd\u662f\u8868\u793a 8 \u4f4d\u503c (0-255) \u7684\u5927\u5199\u5341\u516d\u8fdb\u5236\u53ef\u8bfb\u5b57\u7b26\u5bf9\uff1b\u5373\uff1a\u5728 Modbus ASCII \u4e2d\uff0c\u6bcf\u4e2a\u6570\u636e\u5b57\u8282\u88ab\u5206\u5272\u6210\u8868\u793a\u5341\u516d\u8fdb\u5236\u503c\u4e2d\u7684\u4e24\u4e2a ASCII \u5b57\u7b26\u7684\u4e24\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n

\u7ec4\u4ef6<\/th>\u63cf\u8ff0<\/th>\u5b57\u7b26\u6570<\/th>ASCII\u8868\u793a<\/th><\/tr><\/thead>
Start<\/td>\u6d88\u606f\u5f00\u59cb<\/td>1 CHAR<\/td>:<\/mark><\/strong><\/td><\/tr>
Address<\/td>\u8282\u70b9\u5730\u5740\uff08\u5341\u516d\u8fdb\u5236\u8868\u793a\uff09<\/td>2 CHARS<\/td><\/td><\/tr>
Function<\/td>\u529f\u80fd\u7801\uff08\u5341\u516d\u8fdb\u5236\u8868\u793a\uff09<\/td>2 CHARS<\/td><\/td><\/tr>
Data<\/td>\u6570\u636e\uff08\u6839\u636e\u529f\u80fd\u7801\u53d8\u5316\uff0c\u5341\u516d\u8fdb\u5236\u8868\u793a\uff09<\/td>n CHARS<\/td><\/td><\/tr>
LRC CHECK<\/td>\u7eb5\u5411\u5197\u4f59\u68c0\u9a8c\u7801\uff08LRC\uff09<\/td>2 CHARS<\/td><\/td><\/tr>
END<\/td>\u6d88\u606f\u7ed3\u675f\uff0c\u56de\u8f66\u6362\u884c<\/td>2 CHARS<\/td>CRLF<\/mark><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u5728 ASCII \u6a21\u5f0f\u4e0b\uff0cModbus \u6d88\u606f\u7684\u6bcf\u4e2a\u90e8\u5206\u90fd\u4ee5\u7279\u5b9a\u7684\u5b57\u7b26\u6570\u548c\u683c\u5f0f\u51fa\u73b0\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n

:AA BB CC...DD EE<CRLF><\/pre><\/div>\n\n\n\n
    \n
  • :<\/code> – \u6d88\u606f\u7684\u5f00\u59cb\u7b26\u53f7\u3002<\/li>\n\n\n\n
  • AA<\/code> – \u8282\u70b9\u5730\u5740\uff0c\u5341\u516d\u8fdb\u5236\u8868\u793a\u3002<\/li>\n\n\n\n
  • BB<\/code> – \u529f\u80fd\u7801\uff0c\u5341\u516d\u8fdb\u5236\u8868\u793a\u3002<\/li>\n\n\n\n
  • CC...DD<\/code> – \u6570\u636e\u5b57\u6bb5\uff0c\u6839\u636e\u529f\u80fd\u7801\u548c\u9700\u8981\u4f20\u8f93\u7684\u6570\u636e\u957f\u5ea6\u53d8\u5316\u3002<\/li>\n\n\n\n
  • EE<\/code> – LRC \u6821\u9a8c\u7801\uff0c\u7528\u4e8e\u9519\u8bef\u68c0\u6d4b\u3002<\/li>\n\n\n\n
  • <CRLF><\/code> – \u6d88\u606f\u7684\u7ed3\u675f\u7b26\u53f7\uff0c\u4ee3\u8868\u56de\u8f66\u548c\u6362\u884c\uff08Carriage Return Line Feed\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
    <\/figure>\n\n\n\n
    ASCII\u5e27\u7684\u4f20\u8f93\u72b6\u6001<\/h2>\n\n\n\n
    <\/figure>\n\n\n\n
    \u4e0a\u9762\u72b6\u6001\u56fe\u53ef\u4ee5\u5f97\u5230\u7684\u4fe1\u606f:<\/p>\n\n\n\n
    1\uff09\u201c\u7a7a\u95f2\u201d \u6001\u662f\u6ca1\u6709\u53d1\u9001\u548c\u63a5\u6536\u62a5\u6587\u8981\u5904\u7406\u7684\u6b63\u5e38\u72b6\u6001\u3002<\/p>\n\n\n\n
    2\uff09\u6bcf\u6b21\u63a5\u6536\u5230 “:” \u5b57\u7b26\u8868\u793a\u65b0\u7684\u62a5\u6587\u7684\u5f00\u59cb\u3002\u5982\u679c\u5728\u4e00\u4e2a\u62a5\u6587\u7684\u63a5\u6536\u8fc7\u7a0b\u4e2d\u6536\u5230\u8be5\u5b57\u7b26\uff0c\u5219\u5f53\u524d\u5730\u62a5\u6587\u88ab\u8ba4\u4e3a\u4e0d\u5b8c\u6574\u5e76\u88ab\u4e22\u5f03\u3002\u800c\u4e00\u4e2a\u65b0\u7684\u63a5\u6536\u7f13\u51b2\u533a\u88ab\u91cd\u65b0\u5206\u914d\u3002<\/p>\n\n\n\n
    3\uff09\u68c0\u6d4b\u5230\u5e27\u7ed3\u675f\u540e\uff0c\u5b8c\u6210 LRC \u8ba1\u7b97\u548c\u68c0\u9a8c\u3002\u7136\u540e\uff0c\u5206\u6790\u5730\u5740\u57df\u4ee5\u786e\u5b9a\u5e27\u662f\u5426\u53d1\u5f80\u6b64\u8bbe\u5907\uff0c\u5982\u679c\u4e0d\u662f\uff0c\u5219\u4e22\u5f03\u6b64\u5e27\u3002 \u4e3a\u4e86\u51cf\u5c11\u63a5\u6536\u5904\u7406\u65f6\u95f4\uff0c\u5730\u5740\u57df\u53ef\u4ee5\u5728\u4e00\u63a5\u5230\u5c31\u5206\u6790\uff0c\u800c\u4e0d\u9700\u8981\u7b49\u5230\u6574\u4e2a\u5e27\u7ed3\u675f\u3002<\/p>\n\n\n\n
    ASCII\u5e27\u7684\u62a5\u6587\u4f20\u8f93<\/h2>\n\n\n\n
    \u7531\u4e8eASCII\u62a5\u6587\u5e27\u4e0eRTU\u62a5\u6587\u5e27\u6709\u7740\u5f88\u5927\u7684\u4e0d\u540c\uff0cASCII\u62a5\u6587\u5e27\u662f\u6709\u8d77\u59cb\u548c\u7ed3\u675f\u6807\u8bc6\u7b26\u7684\uff0c\u800cRTU\u5e27\u6ca1\u6709\u8fd9\u6837\u7684\u6807\u8bc6\u3002\u6240\u4ee5ASCII\u62a5\u6587\u5e27\u7684\u63a5\u6536\u5c31\u7b80\u5355\u65b9\u4fbf\u591a\u4e86\uff0c\u4e5f\u4e0d\u9700\u8981\u4ec0\u4e48t3.5\u7684\u5e27\u95f4\u9694\u65f6\u95f4\u3002<\/p>\n\n\n\n
    \u4f46\u662f\u5462\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u63a5\u6536\u7684\u62a5\u6587\u5e27\u8fde\u7eed\uff0c\u8fd8\u662f\u53ef\u4ee5\u7ea6\u5b9a\u5b57\u7b26\u95f4\u7684\u4f20\u8f93\u65f6\u95f4\u7684\u3002\u4e00\u822c\u8ba4\u4e3a\uff0c\u62a5\u6587\u4e2d\u7684\u5b57\u7b26\u65f6\u95f4\u95f4\u9694\u53ef\u4ee5\u8fbe\u5230\u4e00\u79d2\uff0c\u5982\u679c\u8d85\u8fc7\u4e86\u8fd9\u4e2a\u65f6\u95f4\u95f4\u9694\uff0c\u5c31\u8ba4\u4e3a\u53d1\u751f\u4e86\u9519\u8bef\uff0c\u8981\u5e9f\u5f03\u6389\u8fd9\u4e00\u5e27\u62a5\u6587\u6570\u636e\uff0c\u91cd\u65b0\u5f00\u59cb\u63a5\u6536\u3002<\/p>\n\n\n\n
    Function Code<\/h2>\n\n\n\n
    ASCII \u6a21\u5f0f\u4e0b\u6700\u5e38\u7528\u7684\u529f\u80fd\u4ee3\u7801\u4e0e RTU \u6a21\u5f0f\u4e0b\u7684\u529f\u80fd\u4ee3\u7801\u5b9a\u4e49\u76f8\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684\u529f\u80fd\u7801\u53ca\u5176\u63cf\u8ff0\uff1a<\/p>\n\n\n\n
    \u8bbf\u95ee\u5730\u5740<\/th>\u6620\u5c04\u5730\u5740<\/th>\u63cf\u8ff0<\/th>\u529f\u80fd<\/th>R\/W<\/th><\/tr><\/thead>
    1 ~ 10000<\/td>address-1<\/td>Coils<\/td>01\/05\/15<\/td>R\/W<\/td><\/tr>
    10001 ~ 20000<\/td>address-10001<\/td>Discrete Inputs<\/td>02<\/td>R<\/td><\/tr>
    30001 ~ 40000<\/td>address-30001<\/td>Input Registers<\/td>04<\/td>R<\/td><\/tr>
    40001 ~ 50000<\/td>address-40001<\/td>Holding Registers<\/td>03\/06\/16<\/td>R\/W<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    ASCII\u4f20\u8f93\u793a\u4f8b<\/h3>\n\n\n\n
    \u4f8b\u5982\uff0c\u8981\u8bfb\u53d6\u5730\u5740 0x20C1<\/code> \u7684\u4e24\u4e2a\u5bc4\u5b58\u5668\uff0c\u9700\u8981\u53d1\u9001\u4ee5\u4e0b ASCII \u6d88\u606f\uff1a<\/p>\n\n\n\n
    :010420C1000218<CRLF><\/pre><\/div>\n\n\n\n
    \u8bf7\u6c42\uff1a<\/p>\n\n\n\n
      \n
    • :<\/code> – \u6d88\u606f\u5f00\u59cb – 0x3A<\/li>\n\n\n\n
    • 01<\/code> – \u4ece\u7ad9\u5730\u5740 – 0x01<\/li>\n\n\n\n
    • 04<\/code> – \u529f\u80fd\u7801 (\u8bfb\u53d6\u8f93\u5165\u5bc4\u5b58\u5668) – 0x04<\/li>\n\n\n\n
    • 20C1<\/code> – \u8981\u8bfb\u53d6\u7684\u5bc4\u5b58\u5668\u5730\u5740 – 0x20C1<\/li>\n\n\n\n
    • 0002<\/code> – \u8981\u8bfb\u53d6\u7684\u5bc4\u5b58\u5668\u957f\u5ea6 (\u5fc5\u987b\u662f 2) – 0x0002<\/li>\n\n\n\n
    • 18<\/code> – LRC \u6821\u9a8c\u7801<\/li>\n\n\n\n
    • <CRLF><\/code> – \u6d88\u606f\u7ed3\u675f\uff0c\u56de\u8f66\u6362\u884c – 0x0D0A<\/li>\n<\/ul>\n\n\n\n
      \u54cd\u5e94\uff1a<\/p>\n\n\n\n
      :01040400001234B1<CRLF><\/pre><\/div>\n\n\n\n
      \u54cd\u5e94\uff1a<\/p>\n\n\n\n
        \n
      • :<\/code> – \u6d88\u606f\u5f00\u59cb – 0x3A<\/li>\n\n\n\n
      • 01<\/code> – \u4ece\u7ad9\u5730\u5740 – 0x01<\/li>\n\n\n\n
      • 04<\/code> – \u529f\u80fd\u7801 (\u8bfb\u53d6\u8f93\u5165\u5bc4\u5b58\u5668) – 0x04<\/li>\n\n\n\n
      • 04<\/code> – \u8bfb\u53d6\u6570\u636e\u957f\u5ea6 (4 \u5b57\u8282) – 0x04<\/li>\n\n\n\n
      • 00001234<\/code> – \u4ece VAR1 \u8bfb\u53d6\u7684\u503c – 0x00001234<\/li>\n\n\n\n
      • B1<\/code> – LRC \u6821\u9a8c\u7801<\/li>\n\n\n\n
      • <CRLF><\/code> – \u6d88\u606f\u7ed3\u675f\uff0c\u56de\u8f66\u6362\u884c – 0x0D0A<\/li>\n<\/ul>\n\n\n\n
        \u5e38\u7528\u529f\u80fd\u7801\u64cd\u4f5c<\/h2>\n\n\n\n
        \u4ee5\u4e0b\u662f Modbus \u7684\u5e38\u7528\u529f\u80fd\u7801\u53ca\u5176\u8bf7\u6c42\u548c\u54cd\u5e94\u793a\u4f8b\uff1a<\/p>\n\n\n\n
        \u529f\u80fd 01\uff0801H\uff09\u8bfb\u7ebf\u5708<\/h3>\n\n\n\n
          \n
        • \u8bf7\u6c42\uff1a\u8bfb\u53d6\u4ece\u673a\u4e2d\u7ebf\u5708\u7684 ON\/OFF \u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n
          <\/figure>\n\n\n\n
            \n
          • \u54cd\u5e94\uff1a\u7ebf\u5708\u72b6\u6001\u54cd\u5e94\u6d88\u606f\u88ab\u6253\u5305\u4e3a\u6570\u636e\u5b57\u6bb5\u7684\u6bcf\u6bd4\u7279\u8868\u793a\u4e00\u4e2a\u7ebf\u5708\u3002<\/li>\n<\/ul>\n\n\n\n
            <\/figure>\n\n\n\n
            \u529f\u80fd 02\uff0802H\uff09\u8bfb\u79bb\u6563\u8f93\u5165<\/h3>\n\n\n\n
              \n
            • \u8bf7\u6c42\uff1a\u8bfb\u53d6\u4ece\u673a\u4e2d\u79bb\u6563\u8f93\u5165\u7684 ON\/OFF \u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n
              <\/figure>\n\n\n\n
                \n
              • \u54cd\u5e94\uff1a\u79bb\u6563\u8f93\u5165\u72b6\u6001\u54cd\u5e94\u6d88\u606f\u7684\u6784\u9020\u4e0e\u7ebf\u5708\u72b6\u6001\u76f8\u540c\u3002<\/li>\n<\/ul>\n\n\n\n
                <\/figure>\n\n\n\n
                \u529f\u80fd 03\uff0803H\uff09\u8bfb\u4fdd\u6301\u5bc4\u5b58\u5668<\/h3>\n\n\n\n
                  \n
                • \u8bf7\u6c42\uff1a\u8bfb\u53d6\u4ece\u673a\u4e2d\u4fdd\u6301\u5bc4\u5b58\u5668\u7684\u4e8c\u8fdb\u5236\u5185\u5bb9\u3002<\/li>\n<\/ul>\n\n\n\n
                  <\/figure>\n\n\n\n
                    \n
                  • \u54cd\u5e94\uff1a\u4fdd\u6301\u5bc4\u5b58\u5668\u6570\u636e\u5728\u6bcf\u4e2a\u5bc4\u5b58\u5668\u4e2d\u6253\u5305\u4e3a\u4e24\u4e2a\u5b57\u8282\u3002<\/li>\n<\/ul>\n\n\n\n
                    <\/figure>\n\n\n\n
                    \u529f\u80fd 04\uff0804H\uff09\u8bfb\u8f93\u5165\u5bc4\u5b58\u5668<\/h3>\n\n\n\n
                      \n
                    • \u8bf7\u6c42\uff1a\u8bfb\u53d6\u4ece\u673a\u4e2d\u8f93\u5165\u5bc4\u5b58\u5668\u7684\u4e8c\u8fdb\u5236\u5185\u5bb9\u3002<\/li>\n<\/ul>\n\n\n\n
                      <\/figure>\n\n\n\n
                        \n
                      • \u54cd\u5e94\uff1a\u8bfb\u8f93\u5165\u5bc4\u5b58\u5668\u6570\u636e\u7684\u54cd\u5e94\u6d88\u606f\u7684\u6784\u9020\u4e0e\u8bfb\u53d6\u4fdd\u6301\u5bc4\u5b58\u5668\u76f8\u540c\u3002<\/li>\n<\/ul>\n\n\n\n
                        <\/figure>\n\n\n\n
                        \u529f\u80fd 05\uff0805H\uff09\u5199\u5355\u7ebf\u5708<\/h3>\n\n\n\n
                          \n
                        • \u8bf7\u6c42\uff1a\u5c06\u5355\u4e2a\u7ebf\u5708\u5199\u5165 ON \u6216 OFF\u3002<\/li>\n<\/ul>\n\n\n\n
                          <\/figure>\n\n\n\n
                            \n
                          • \u54cd\u5e94\uff1a\u6b63\u5e38\u7684\u54cd\u5e94\u662f\u8bf7\u6c42\u7684\u56de\u663e\u3002<\/li>\n<\/ul>\n\n\n\n
                            <\/figure>\n\n\n\n
                            \u529f\u80fd 06\uff0806H\uff09\u5199\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668<\/h3>\n\n\n\n
                              \n
                            • \u8bf7\u6c42\u5c06\u4e00\u4e2a\u503c\u5199\u5165\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u4e2d\u3002\u5f53\u5e7f\u64ad\u65f6\uff0c\u8be5\u51fd\u6570\u5728\u6240\u6709\u9644\u52a0\u7684\u4ece\u673a\u4e0a\u8bbe\u7f6e\u76f8\u540c\u7684\u5bc4\u5b58\u5668\u5f15\u7528\u3002\u8bf7\u6c42\u6d88\u606f\u6307\u5b9a\u8981\u5199\u5165\u7684\u5bc4\u5b58\u5668\u5f15\u7528\uff08\u6307\u5b9a\u5730\u5740\u548c\u6570\u503c\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
                              <\/figure>\n\n\n\n
                                \n
                              • \u54cd\u5e94<\/span>
                                \u6b63\u5e38\u7684\u54cd\u5e94\u662f\u8bf7\u6c42\u7684\u56de\u663e\uff0c\u5728\u5199\u5165\u4fdd\u6301\u5bc4\u5b58\u5668\u5185\u5bb9\u4e4b\u540e\u8fd4\u56de\u3002<\/p><\/li>\n<\/ul>\n\n\n\n
                                <\/figure>\n\n\n\n
                                \u529f\u80fd 15\uff080FH\uff09\u5199\u591a\u4e2a\u7ebf\u5708<\/h3>\n\n\n\n
                                  \n
                                • \u8bf7\u6c42\uff1a\u5c06\u4e00\u4e2a\u7ebf\u5708\u5e8f\u5217\u4e2d\u7684\u6bcf\u4e2a\u7ebf\u5708\u5199\u5165 ON \u6216 OFF\u3002<\/li>\n<\/ul>\n\n\n\n
                                  <\/figure>\n\n\n\n
                                    \n
                                  • \u54cd\u5e94\uff1a\u6b63\u5e38\u54cd\u5e94\u8fd4\u56de\u4ece\u5730\u5740\u3001\u529f\u80fd\u4ee3\u7801\u3001\u8d77\u59cb\u5730\u5740\u548c\u5199\u5165\u7684\u7ebf\u5708\u6570\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n
                                    <\/figure>\n\n\n\n
                                    \u529f\u80fd 16\uff0810H\uff09\u5199\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668<\/h3>\n\n\n\n
                                      \n
                                    • \u8bf7\u6c42\uff1a\u5c06\u503c\u5199\u5165\u5230\u4e00\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u5e8f\u5217\u4e2d\u3002<\/li>\n<\/ul>\n\n\n\n
                                      <\/figure>\n\n\n\n
                                        \n
                                      • \u54cd\u5e94\uff1a\u6b63\u5e38\u54cd\u5e94\u8fd4\u56de\u4ece\u5730\u5740\u3001\u529f\u80fd\u4ee3\u7801\u3001\u8d77\u59cb\u5730\u5740\u548c\u5199\u5165\u7684\u5bc4\u5b58\u5668\u6570\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n
                                        <\/figure>\n\n\n\n
                                        LRC\u6821\u9a8c<\/h3>\n\n\n\n
                                        LRC \u6821\u9a8c\u7801\u7684\u8ba1\u7b97\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                                        unsigned char ucMBLRC( unsigned char * pucFrame, unsigned short usLen )\n{\n    unsigned char ucLRC = 0;  \/* LRC char initialized *\/\n\n    while( usLen-- )\n    {\n        ucLRC += *pucFrame++;   \/* Add buffer byte without carry *\/\n    }\n\n    \/* Return twos complement *\/\n    ucLRC = ( UCHAR ) ( -( ( CHAR ) ucLRC ) );\n    return ucLRC;\n}<\/pre><\/div>\n<\/span>","protected":false},"excerpt":{"rendered":"
                                        MODBUS ASCII \u2014 <\/p>","protected":false},"author":1,"featured_media":27977,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[1394],"tags":[643,629,902,560,559],"class_list":["post-27886","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-modbus-protocol","tag-ascii","tag-lrc","tag-902","tag-560","tag-559"],"_links":{"self":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts\/27886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/comments?post=27886"}],"version-history":[{"count":0,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/posts\/27886\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/media\/27977"}],"wp:attachment":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/media?parent=27886"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/categories?post=27886"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/tags?post=27886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}