"# Modbus\u3001ASCII\u3001\u4e32\u53e3\u3001\u6ce2\u7279\u7387\u7b49\u5e38\u7528\u672f\u8bed\u89e3\u91ca\n\n> 2022-11-16 | 2026-07-01\n> https:\/\/www.modbus.cn\/en\/11092.html\n\n**Modbus \u534f\u8bae\u6807\u51c6**\n\n---\n\n01 \u672f\u8bed\u89e3\u8bfb\n\n\u6821\u9a8c\u7801\uff1a\u6821\u9a8c\u7801\u662f\u7531\u524d\u9762\u7684\u6570\u636e\u901a\u8fc7\u67d0\u79cd\u7b97\u6cd5\u5f97\u51fa\u7684\uff0c\u7528\u4ee5\u68c0\u9a8c\u8be5\u7ec4\u6570\u636e\u7684\u6b63\u786e\u6027\u3002\u4ee3\u7801\u4f5c\u4e3a\u6570\u636e\u5728\u5411\u8ba1\u7b97\u673a\u6216\u5176\u5b83\u8bbe\u5907\u8fdb\u884c\u8f93\u5165\u65f6\uff0c\u5bb9\u6613\u4ea7\u751f\u8f93\u5165\u9519\u8bef\uff0c\u4e3a\u4e86\u51cf\u5c11\u8fd9\u79cd\u8f93\u5165\u9519\u8bef\uff0c\u7f16\u7801\u4e13\u5bb6\u53d1\u660e\u4e86\u5404\u79cd\u6821\u9a8c\u68c0\u9519\u65b9\u6cd5\uff0c\u5e76\u4f9d\u636e\u8fd9\u4e9b\u65b9\u6cd5\u8bbe\u7f6e\u4e86\u6821\u9a8c\u7801\u3002\n\n\u5e38\u7528\u7684\u6821\u9a8c\u6709\uff1a\u7d2f\u52a0\u548c\u6821\u9a8cSUM\u3001\u5b57\u8282\u5f02\u6216\u6821\u9a8cXOR\u3001\u7eb5\u5411\u5197\u4f59\u6821\u9a8cLRC\u3001\u5faa\u73af\u5197\u4f59\u6821\u9a8cCRC\u2026\u2026\n\n\u79bb\u6563\u91cf\u8f93\u5165\uff1a\u4e3b\u8981\u7528\u6765\u8bfb\u53d6\u5355\u4e2a\u4f4d\u7684\u6570\u636e\uff0c\u5982IO\u7684\u72b6\u6001\uff1b\n\n\u7ebf\u5708\uff1a\u5f00\u5173\u8f93\u51fa\u4fe1\u53f7\uff0c\u4e3b\u8981\u7528\u6765\u5199\u5165\u5355\u4e2a\u4f4d\u7684\u6570\u636e\uff0c\u4e0e\u79bb\u6563\u91cf\u6784\u6210\u7ec4\u6210\u5bf9\u4f4d\u7684\u64cd\u4f5c\uff1b\n\n\u8f93\u5165\u5bc4\u5b58\u5668\uff1a\u4e3b\u8981\u7528\u6765\u8bfb\u53d616\u4f4d\uff0c\u4e5f\u5c31\u662f\u4e24\u4e2a\u5b57\u8282\u7684\u6570\u636e\uff1b\n\n\u4fdd\u6301\u5bc4\u5b58\u5668\uff1a\u4e3b\u8981\u7528\u6765\u5199\u516516\u4f4d\u7684\u6570\u636e\u3002\n\nPLC\uff1a\u53ef\u7f16\u7a0b\u903b\u8f91\u63a7\u5236\u5668\uff0c\u662f\u4e00\u79cd\u91c7\u7528\u4e00\u7c7b\u53ef\u7f16\u7a0b\u7684\u5b58\u50a8\u5668\uff0c\u7528\u4e8e\u5176\u5185\u90e8\u5b58\u50a8\u7a0b\u5e8f\uff0c\u6267\u884c\u903b\u8f91\u8fd0\u7b97\u3001\u987a\u5e8f\u63a7\u5236\u3001\u5b9a\u65f6\u3001\u8ba1\u6570\u4e0e\u7b97\u672f\u64cd\u4f5c\u7b49\u9762\u5411\u7528\u6237\u7684\u6307\u4ee4\uff0c\u5e76\u901a\u8fc7\u6570\u5b57\u6216\u6a21\u62df\u5f0f\u8f93\u5165\/\u8f93\u51fa\u63a7\u5236\u5404\u79cd\u7c7b\u578b\u7684\u673a\u68b0\u6216\u751f\u4ea7\u8fc7\u7a0b\u3002\n\n\u4e32\u53e3\u901a\u4fe1\uff1a\u968f\u7740\u8ba1\u7b97\u673a\u7cfb\u7edf\u7684\u5e94\u7528\u548c\u5fae\u673a\u7f51\u7edc\u7684\u53d1\u5c55\uff0c\u901a\u4fe1\u529f\u80fd\u8d8a\u6765\u8d8a\u663e\u5f97\u91cd\u8981.\u8fd9\u91cc\u6240\u8bf4\u7684\u901a\u4fe1\u662f\u6307\u8ba1\u7b97\u673a\u4e0e\u5916\u754c\u7684\u4fe1\u606f\u4ea4\u6362.\u56e0\u6b64\uff0c\u901a\u4fe1\u65e2\u5305\u62ec\u8ba1\u7b97\u673a\u4e0e\u5916\u90e8\u8bbe\u5907\u4e4b\u95f4\uff0c\u4e5f\u5305\u62ec\u8ba1\u7b97\u673a\u548c\u8ba1\u7b97\u673a\u4e4b\u95f4\u7684\u4fe1\u606f\u4ea4\u6362.\u7531\u4e8e\u4e32\u884c\u901a\u4fe1\u662f\u5728\u4e00\u6839\u4f20\u8f93\u7ebf\u4e0a\u4e00\u4f4d\u4e00\u4f4d\u7684\u4f20\u9001\u4fe1\u606f\uff0c\u6240\u7528\u7684\u4f20\u8f93\u7ebf\u5c11\uff0c\u5e76\u4e14\u53ef\u4ee5\u501f\u52a9\u73b0\u6210\u7684\u7535\u8bdd\u7f51\u8fdb\u884c\u4fe1\u606f\u4f20\u9001\uff0c\u56e0\u6b64\uff0c\u7279\u522b\u9002\u5408\u4e8e\u8fdc\u8ddd\u79bb\u4f20\u8f93.\u5bf9\u4e8e\u90a3\u4e9b\u4e0e\u8ba1\u7b97\u673a\u76f8\u8ddd\u4e0d\u8fdc\u7684\u4eba\uff0d\u673a\u4ea4\u6362\u8bbe\u5907\u548c\u4e32\u884c\u5b58\u50a8\u7684\u5916\u90e8\u8bbe\u5907\u5982\u7ec8\u7aef\u3001\u6253\u5370\u673a\u3001\u903b\u8f91\u5206\u6790\u4eea\u3001\u78c1\u76d8\u7b49\uff0c\u91c7\u7528\u4e32\u884c\u65b9\u5f0f\u4ea4\u6362\u6570\u636e\u4e5f\u5f88\u666e\u904d.\u5728\u5b9e\u65f6\u63a7\u5236\u548c\u7ba1\u7406\u65b9\u9762\uff0c\u91c7\u7528\u591a\u53f0\u5fae\u673a\u5904\u7406\u673a\u7ec4\u6210\u5206\u7ea7\u5206\u5e03\u63a7\u5236\u7cfb\u7edf\u4e2d\uff0c\u5404 CPU \u4e4b\u95f4\u7684\u901a\u4fe1\u4e00\u822c\u90fd\u662f\u4e32\u884c\u65b9\u5f0f.\u6240\u4ee5\u4e32\u884c\u63a5\u53e3\u662f\u5fae\u673a\u5e94\u7528\u7cfb\u7edf\u5e38\u7528\u7684\u63a5\u53e3\u3002\u8bb8\u591a\u5916\u8bbe\u548c\u8ba1\u7b97\u673a\u6309\u4e32\u884c\u65b9\u5f0f\u8fdb\u884c\u901a\u4fe1\uff0c\u8fd9\u91cc\u6240\u8bf4\u7684\u4e32\u884c\u65b9\u5f0f\uff0c\u662f\u6307\u5916\u8bbe\u4e0e\u63a5\u53e3\u7535\u8def\u4e4b\u95f4\u7684\u4fe1\u606f\u4f20\u9001\u65b9\u5f0f\uff0c\u5b9e\u9645\u4e0a\uff0cCPU \u4e0e\u63a5\u53e3\u4e4b\u95f4\u4ecd\u6309\u5e76\u884c\u65b9\u5f0f\u5de5\u4f5c.\n\n\u4e32\u53e3\uff1a\u4e32\u53e3\u662f\u8ba1\u7b97\u673a\u4e0a\u4e00\u79cd\u975e\u5e38\u901a\u7528\u8bbe\u5907\u901a\u4fe1\u7684\u534f\u8bae\uff0c\u4e0d\u8981\u4e0e\u901a\u7528\u4e32\u884c\u603b\u7ebfUniversal Serial Bus\uff08USB\uff09\u6df7\u6dc6\u3002\u5927\u591a\u6570\u8ba1\u7b97\u673a\u5305\u542b\u4e24\u4e2a\u57fa\u4e8eRS232\u7684\u4e32\u53e3\u3002\u4e32\u53e3\u540c\u65f6\u4e5f\u662f\u4eea\u5668\u4eea\u8868\u8bbe\u5907\u901a\u7528\u7684\u901a\u4fe1\u534f\u8bae\uff1b\u5f88\u591aGPIB\u517c\u5bb9\u7684\u8bbe\u5907\u4e5f\u5e26\u6709RS-232\u53e3\u3002\u540c\u65f6\uff0c\u4e32\u53e3\u901a\u4fe1\u534f\u8bae\u4e5f\u53ef\u4ee5\u7528\u4e8e\u83b7\u53d6\u8fdc\u7a0b\u91c7\u96c6\u8bbe\u5907\u7684\u6570\u636e\u3002\n\n\u4e32\u53e3\u901a\u4fe1\u7684\u6982\u5ff5\u975e\u5e38\u7b80\u5355\uff0c\u4e32\u53e3\u6309\u4f4d\uff08bit\uff09\u53d1\u9001\u548c\u63a5\u6536\u5b57\u8282\u3002\u5c3d\u7ba1\u6bd4\u6309\u5b57\u8282\uff08byte\uff09\u7684\u5e76\u884c\u901a\u4fe1\u6162\uff0c\u4f46\u662f\u4e32\u53e3\u53ef\u4ee5\u5728\u4f7f\u7528\u4e00\u6839\u7ebf\u53d1\u9001\u6570\u636e\u7684\u540c\u65f6\u7528\u53e6\u4e00\u6839\u7ebf\u63a5\u6536\u6570\u636e\u3002\u5b83\u5f88\u7b80\u5355\u5e76\u4e14\u80fd\u591f\u5b9e\u73b0\u8fdc\u8ddd\u79bb\u901a\u4fe1\u3002\u6bd4\u5982IEEE488\u5b9a\u4e49\u5e76\u884c\u901a\u884c\u72b6\u6001\u65f6\uff0c\u89c4\u5b9a\u8bbe\u5907\u7ebf\u603b\u957f\u4e0d\u5f97\u8d85\u8fc720\u7c73\uff0c\u5e76\u4e14\u4efb\u610f\u4e24\u4e2a\u8bbe\u5907\u95f4\u7684\u957f\u5ea6\u4e0d\u5f97\u8d85\u8fc72\u7c73\uff1b\u800c\u5bf9\u4e8e\u4e32\u53e3\u800c\u8a00\uff0c\u957f\u5ea6\u53ef\u8fbe1200\u7c73\u3002\n\n\u5178\u578b\u5730\uff0c\u4e32\u53e3\u7528\u4e8eASCII\u7801\u5b57\u7b26\u7684\u4f20\u8f93\u3002\u901a\u4fe1\u4f7f\u75283\u6839\u7ebf\u5b8c\u6210\uff1a\uff081\uff09\u5730\u7ebf\uff0c\uff082\uff09\u53d1\u9001\uff0c\uff083\uff09\u63a5\u6536\u3002\u7531\u4e8e\u4e32\u53e3\u901a\u4fe1\u662f\u5f02\u6b65\u7684\uff0c\u7aef\u53e3\u80fd\u591f\u5728\u4e00\u6839\u7ebf\u4e0a\u53d1\u9001\u6570\u636e\u540c\u65f6\u5728\u53e6\u4e00\u6839\u7ebf\u4e0a\u63a5\u6536\u6570\u636e\u3002\u5176\u4ed6\u7ebf\u7528\u4e8e\u63e1\u624b\uff0c\u4f46\u662f\u4e0d\u662f\u5fc5\u987b\u7684\u3002\u4e32\u53e3\u901a\u4fe1\u6700\u91cd\u8981\u7684\u53c2\u6570\u662f\u6ce2\u7279\u7387\u3001\u6570\u636e\u4f4d\u3001\u505c\u6b62\u4f4d\u548c\u5947\u5076\u6821\u9a8c\u3002\u5bf9\u4e8e\u4e24\u4e2a\u8fdb\u884c\u901a\u884c\u7684\u7aef\u53e3\uff0c\u8fd9\u4e9b\u53c2\u6570\u5fc5\u987b\u5339\u914d\uff1a\n\na. \u6ce2\u7279\u7387\uff1a\u8fd9\u662f\u4e00\u4e2a\u8861\u91cf\u901a\u4fe1\u901f\u5ea6\u7684\u53c2\u6570\u3002\u5b83\u8868\u793a\u6bcf\u79d2\u949f\u4f20\u9001\u7684bit\u7684\u4e2a\u6570\u3002\u4f8b\u5982300\u6ce2\u7279\u8868\u793a\u6bcf\u79d2\u949f\u53d1\u9001300\u4e2abit\u3002\u5f53\u6211\u4eec\u63d0\u5230\u65f6\u949f\u5468\u671f\u65f6\uff0c\u6211\u4eec\u5c31\u662f\u6307\u6ce2\u7279\u7387\u3002\u4f8b\u5982\u5982\u679c\u534f\u8bae\u9700\u89814800\u6ce2\u7279\u7387\uff0c\u90a3\u4e48\u65f6\u949f\u662f4800Hz\u3002\u8fd9\u610f\u5473\u7740\u4e32\u53e3\u901a\u4fe1\u5728\u6570\u636e\u7ebf\u4e0a\u7684\u91c7\u6837\u7387\u4e3a4800Hz\u3002\u901a\u5e38\u7535\u8bdd\u7ebf\u7684\u6ce2\u7279\u7387\u4e3a14400\uff0c28800\u548c36600\u3002\u6ce2\u7279\u7387\u53ef\u4ee5\u8fdc\u8fdc\u5927\u4e8e\u8fd9\u4e9b\u503c\uff0c\u4f46\u662f\u6ce2\u7279\u7387\u548c\u8ddd\u79bb\u6210\u53cd\u6bd4\u3002\u9ad8\u6ce2\u7279\u7387\u5e38\u5e38\u7528\u4e8e\u653e\u7f6e\u7684\u5f88\u8fd1\u7684\u4eea\u5668\u95f4\u7684\u901a\u4fe1\uff0c\u5178\u578b\u7684\u4f8b\u5b50\u5c31\u662fGPIB\u8bbe\u5907\u7684\u901a\u4fe1\u3002\n\nb. \u6570\u636e\u4f4d\uff1a\u8fd9\u662f\u8861\u91cf\u901a\u4fe1\u4e2d\u5b9e\u9645\u6570\u636e\u4f4d\u7684\u53c2\u6570\u3002\u5f53\u8ba1\u7b97\u673a\u53d1\u9001\u4e00\u4e2a\u4fe1\u606f\u5305\uff0c\u5b9e\u9645\u7684\u6570\u636e\u4e0d\u4f1a\u662f8\u4f4d\u7684\uff0c\u6807\u51c6\u7684\u503c\u662f5\u30017\u548c8\u4f4d\u3002\u5982\u4f55\u8bbe\u7f6e\u53d6\u51b3\u4e8e\u4f60\u60f3\u4f20\u9001\u7684\u4fe1\u606f\u3002\u6bd4\u5982\uff0c\u6807\u51c6\u7684ASCII\u7801\u662f0\uff5e127\uff087\u4f4d\uff09\u3002\u6269\u5c55\u7684ASCII\u7801\u662f0\uff5e255\uff088\u4f4d\uff09\u3002\u5982\u679c\u6570\u636e\u4f7f\u7528\u7b80\u5355\u7684\u6587\u672c\uff08\u6807\u51c6 ASCII\u7801\uff09\uff0c\u90a3\u4e48\u6bcf\u4e2a\u6570\u636e\u5305\u4f7f\u75287\u4f4d\u6570\u636e\u3002\u6bcf\u4e2a\u5305\u662f\u6307\u4e00\u4e2a\u5b57\u8282\uff0c\u5305\u62ec\u5f00\u59cb\/\u505c\u6b62\u4f4d\uff0c\u6570\u636e\u4f4d\u548c\u5947\u5076\u6821\u9a8c\u4f4d\u3002\u7531\u4e8e\u5b9e\u9645\u6570\u636e\u4f4d\u53d6\u51b3\u4e8e\u901a\u4fe1\u534f\u8bae\u7684\u9009\u53d6\uff0c\u672f\u8bed\u201c\u5305\u201d\u6307\u4efb\u4f55\u901a\u4fe1\u7684\u60c5\u51b5\u3002\n\nc. \u505c\u6b62\u4f4d\uff1a\u7528\u4e8e\u8868\u793a\u5355\u4e2a\u5305\u7684\u6700\u540e\u4e00\u4f4d\u3002\u5178\u578b\u7684\u503c\u4e3a1\uff0c1.5\u548c2\u4f4d\u3002\u7531\u4e8e\u6570\u636e\u662f\u5728\u4f20\u8f93\u7ebf\u4e0a\u5b9a\u65f6\u7684\uff0c\u5e76\u4e14\u6bcf\u4e00\u4e2a\u8bbe\u5907\u6709\u5176\u81ea\u5df1\u7684\u65f6\u949f\uff0c\u5f88\u53ef\u80fd\u5728\u901a\u4fe1\u4e2d\u4e24\u53f0\u8bbe\u5907\u95f4\u51fa\u73b0\u4e86\u5c0f\u5c0f\u7684\u4e0d\u540c\u6b65\u3002\u56e0\u6b64\u505c\u6b62\u4f4d\u4e0d\u4ec5\u4ec5\u662f\u8868\u793a\u4f20\u8f93\u7684\u7ed3\u675f\uff0c\u5e76\u4e14\u63d0\u4f9b\u8ba1\u7b97\u673a\u6821\u6b63\u65f6\u949f\u540c\u6b65\u7684\u673a\u4f1a\u3002\u9002\u7528\u4e8e\u505c\u6b62\u4f4d\u7684\u4f4d\u6570\u8d8a\u591a\uff0c\u4e0d\u540c\u65f6\u949f\u540c\u6b65\u7684\u5bb9\u5fcd\u7a0b\u5ea6\u8d8a\u5927\uff0c\u4f46\u662f\u6570\u636e\u4f20\u8f93\u7387\u540c\u65f6\u4e5f\u8d8a\u6162\u3002\n\nd. \u5947\u5076\u6821\u9a8c\u4f4d\uff1a\u5728\u4e32\u53e3\u901a\u4fe1\u4e2d\u4e00\u79cd\u7b80\u5355\u7684\u68c0\u9519\u65b9\u5f0f\u3002\u6709\u56db\u79cd\u68c0\u9519\u65b9\u5f0f\uff1a\u5076\u3001\u5947\u3001\u9ad8\u548c\u4f4e\u3002\u5f53\u7136\u6ca1\u6709\u6821\u9a8c\u4f4d\u4e5f\u662f\u53ef\u4ee5\u7684\u3002\u5bf9\u4e8e\u5076\u548c\u5947\u6821\u9a8c\u7684\u60c5\u51b5\uff0c\u4e32\u53e3\u4f1a\u8bbe\u7f6e\u6821\u9a8c\u4f4d\uff08\u6570\u636e\u4f4d\u540e\u9762\u7684\u4e00\u4f4d\uff09\uff0c\u7528\u4e00\u4e2a\u503c\u786e\u4fdd\u4f20\u8f93\u7684\u6570\u636e\u6709\u5076\u4e2a\u6216\u8005\u5947\u4e2a\u903b\u8f91\u9ad8\u4f4d\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6570\u636e\u662f011\uff0c\u90a3\u4e48\u5bf9\u4e8e\u5076\u6821\u9a8c\uff0c\u6821\u9a8c\u4f4d\u4e3a0\uff0c\u4fdd\u8bc1\u903b\u8f91\u9ad8\u7684\u4f4d\u6570\u662f\u5076\u6570\u4e2a\u3002\u5982\u679c\u662f\u5947\u6821\u9a8c\uff0c\u6821\u9a8c\u4f4d\u4f4d1\uff0c\u8fd9\u6837\u5c31\u67093\u4e2a\u903b\u8f91\u9ad8\u4f4d\u3002\u9ad8\u4f4d\u548c\u4f4e\u4f4d\u4e0d\u771f\u6b63\u7684\u68c0\u67e5\u6570\u636e\uff0c\u7b80\u5355\u7f6e\u4f4d\u903b\u8f91\u9ad8\u6216\u8005\u903b\u8f91\u4f4e\u6821\u9a8c\u3002\u8fd9\u6837\u4f7f\u5f97\u63a5\u6536\u8bbe\u5907\u80fd\u591f\u77e5\u9053\u4e00\u4e2a\u4f4d\u7684\u72b6\u6001\uff0c\u6709\u673a\u4f1a\u5224\u65ad\u662f\u5426\u6709\u566a\u58f0\u5e72\u6270\u4e86\u901a\u4fe1\u6216\u8005\u662f\u5426\u4f20\u8f93\u548c\u63a5\u6536\u6570\u636e\u662f\u5426\u4e0d\u540c\u6b65\u3002\n\n02 \u80cc\u666f\n\n\u65e9\u57281971\u5e74\uff0cModicon\u516c\u53f8\u9996\u6b21\u63a8\u51fa\u4e86Modbus\u534f\u8bae\uff0cModbusRTU\u548cModbus ASCII\u8bde\u751f\u4e8e\u6b64\u3002\u540e\u6765\u65bd\u8010\u5fb7\u7535\u6c14\uff08SchneiderElectric\uff09\u6536\u8d2d\u4e86Modicon\u516c\u53f8\uff0c\u5e76\u57281997\u5e74\u63a8\u51fa\u4e86ModbusTCP\u534f\u8bae\u30022004\u5e74\uff0c\u4e2d\u56fd\u56fd\u5bb6\u6807\u51c6\u59d4\u5458\u4f1a\u6b63\u5f0f\u628aModbus\u4f5c\u4e3a\u4e86\u56fd\u5bb6\u6807\u51c6\uff0c\u5f00\u542f\u4e86Modbus\u4e3a\u4e2d\u56fd\u5de5\u4e1a\u901a\u4fe1\u505a\u8d21\u732e\u7684\u65f6\u4ee3\u3002\n\n\u901a\u8fc7\u6b64\u534f\u8bae\uff0c\u63a7\u5236\u5668\u76f8\u4e92\u4e4b\u95f4\u3001\u63a7\u5236\u5668\u7ecf\u7531\u7f51\u7edc\u548c\u5176\u5b83\u8bbe\u5907\u4e4b\u95f4\u53ef\u4ee5\u901a\u4fe1\u3002Modbus\u534f\u8bae\u5177\u6709\u6807\u51c6\u3001\u5f00\u653e\uff0c\u53ef\u4ee5\u652f\u6301\u591a\u79cd\u7535\u6c14\u63a5\u53e3\uff0c\u6570\u636e\u5e27\u683c\u5f0f\u7b80\u5355\u7d27\u51d1\uff0c\u6570\u636e\u4f20\u8f93\u91cf\u5927\u3001\u5b9e\u65f6\u6027\u597d\u7b49\u7279\u70b9\uff0c\u5728\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u5df2\u7ecf\u6210\u4e3a\u901a\u7528\u5de5\u4e1a\u6807\u51c6\u3002\u6df1\u5165\u5206\u6790Modbus\u534f\u8bae\u5b9e\u73b0\u539f\u7406\u548c\u5176\u5b89\u5168\u6027\u5bf9\u63d0\u9ad8\u5de5\u63a7\u7cfb\u7edf\u5b89\u5168\u6027\u6709\u7740\u91cd\u8981\u7684\u73b0\u5b9e\u610f\u4e49\u3002ModbusRTU\u548cModbusASCII\u4e3b\u8981\u7528\u4e8e\u4e32\u884c\u901a\u4fe1\u9886\u57df\uff0c\u800cModbusTCP\u5219\u5e38\u7528\u4e8e\u4ee5\u592a\u7f51\u901a\u4fe1\u3002\u73b0\u5728\uff0cModbus\u5df2\u7ecf\u6210\u4e3a\u5de5\u4e1a\u9886\u57df\u901a\u4fe1\u534f\u8bae\u6807\u51c6\uff0c\u5e76\u4e14\u73b0\u5728\u662f\u5de5\u4e1a\u7535\u5b50\u8bbe\u5907\u4e4b\u95f4\u76f8\u5f53\u5e38\u7528\u7684\u8fde\u63a5\u65b9\u5f0f\u3002\n\n03 \u534f\u8bae\u539f\u7406\n\nModbus\u4f7f\u7528\u4e00\u79cd\u7b80\u5355\u7684MasterandSlave\u4e3b\u4ece\u534f\u8bae\uff08\u5ba2\u6237\u673a\/\u670d\u52a1\u5668\u534f\u8bae\uff09\u8fdb\u884c\u901a\u4fe1\u3002\u5ba2\u6237\u673a\u4f5c\u4e3a\u4e3b\u7ad9\uff0c\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\uff1b\u670d\u52a1\u5668\uff08\u4ece\u7ad9\uff09\u63a5\u5230\u8bf7\u6c42\u540e\uff0c\u5bf9\u8bf7\u6c42\u8fdb\u884c\u5206\u6790\u5e76\u4f5c\u51fa\u5e94\u7b54\u3002\u5176\u4e2d\u4f7f\u7528\u7684\u901a\u4fe1\u5e27\u88ab\u79f0\u4e3a\u5e94\u7528\u6570\u636e\u5355\u5143\uff08Application Data Unit\uff0cADU\uff09\uff0c\u5b83\u5305\u62ec\u901a\u4fe1\u5730\u5740\u6bb5\u3001\u529f\u80fd\u4ee3\u7801\u6bb5\u3001\u6570\u636e\u6bb5\u548c\u6821\u9a8c\u6bb5\uff0c\u5982\u4e0b\u56fe\uff1a\n\n\u4e00\u822c\u4f7f\u7528\u4e0a\uff0c\u76d1\u63a7\u7cfb\u7edf(HMI)\u90fd\u4e3aMaster\uff0cPLC\u3001\u7535\u8868\u3001\u4eea\u8868\u7b49\u90fd\u4e3aSlave\uff0cHMI\u7cfb\u7edf\u4e00\u76f4PollingSlave\u7684\u5404\u79cdrelayandregister\u6700\u65b0\u6570\u503c\uff0c\u7136\u540e\u505a\u663e\u793a\u53ca\u5404\u79cd\u903b\u8f91\u8ba1\u7b97\u53ca\u63a7\u5236\u8c03\u6574\u7b49\u5904\u7406\u3002\n\n\u5176\u4e2d\uff0c\u529f\u80fd\u4ee3\u7801\u6bb5\u548c\u6570\u636e\u6bb5\u7ec4\u5408\u79f0\u4e3a\u534f\u8bae\u6570\u636e\u5355\u5143\uff08Protocol Data Unit or Protocol Description Unit)\uff0cPDU\uff09\u3002\u529f\u80fd\u4ee3\u7801\u6bb5\u5360\u7528\u4e00\u4e2a\u5b57\u8282\uff0c\u53d6\u503c\u8303\u56f4\u4e3a1~255\uff0c\u5176\u4e2d128~255\u4e3a\u4fdd\u7559\u503c\uff0c\u7528\u4e8e\u5f02\u5e38\u6d88\u606f\u5e94\u7b54\u62a5\u6587\u30021~127\u4e3a\u529f\u80fd\u4ee3\u7801\u7f16\u53f7\uff0c\u5176\u4e2d65~72\u548c100~110\u4e3a\u7528\u6237\u81ea\u5b9a\u4e49\u7f16\u7801\u3002\n\n04 \u4f20\u8f93\u65b9\u5f0f\n\nModbus \u534f\u8bae\u662f\u4e00\u79cd\u5e94\u7528\u5c42\u62a5\u6587\u4f20\u8f93\u534f\u8bae\uff0c\u5305\u62ecASCII\u3001\uff32TU\u3001TCP\u4e09\u79cd\u62a5\u6587\u7c7b\u578b\uff0c\u534f\u8bae\u672c\u8eab\u5e76\u6ca1\u6709\u5b9a\u4e49\u7269\u7406\u5c42\uff0c\u53ea\u662f\u5b9a\u4e49\u4e86\u63a7\u5236\u5668\u80fd\u591f\u8ba4\u8bc6\u548c\u4f7f\u7528\u7684\u6d88\u606f\u7ed3\u6784\uff0c\u800c\u4e0d\u7ba1\u5b83\u4eec\u662f\u7ecf\u8fc7\u4f55\u79cd\u7f51\u7edc\u8fdb\u884c\u901a\u4fe1\u7684\u3002\n\nModbus \u534f\u8bae\u4f7f\u7528\u4e32\u53e3\u4f20\u8f93\u65f6\u53ef\u4ee5\u9009\u62e9\uff32TU\u6216ASCII\u6a21\u5f0f\uff0c\u5e76\u89c4\u5b9a\u4e86\u6d88\u606f\u3001\u6570\u636e\u7ed3\u6784\u3001\u547d\u4ee4\u548c\u5e94\u7b54\u65b9\u5f0f\u5e76\u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u6821\u9a8c\u3002ASCII \u6a21\u5f0f\u91c7\u7528L\uff32C\u6821\u9a8c\uff0c\uff32TU\u6a21\u5f0f\u91c7\u752816 \u4f4dC\uff32C\u6821\u9a8c\u3002\u901a\u8fc7\u4ee5\u592a\u7f51\u4f20\u8f93\u65f6\u4f7f\u7528TCP\uff0c\u8fd9\u79cd\u6a21\u5f0f\u4e0d\u4f7f\u7528\u6821\u9a8c\uff0c\u56e0\u4e3aTCP\u534f\u8bae\u662f\u4e00\u4e2a\u9762\u5411\u8fde\u63a5\u7684\u53ef\u9760\u534f\u8bae\u3002\n\n05 Modbus RTU\u4e0eModbus ASCII\u6709\u4ec0\u4e48\u533a\u522b\n\nModbus\u662f\u4e00\u79cd\u5e94\u7528\u5c42\u534f\u8bae\uff0c\u5b83\u5b9a\u4e49\u4e86\u4e0e\u57fa\u7840\u7f51\u7edc\u65e0\u5173\u7684\u6570\u636e\u5355\u5143\uff08ADU\uff09\uff0c\u53ef\u4ee5\u5728\u4ee5\u592a\u7f51\uff08TCP\/IP\uff09\u6216\u4e32\u884c\u94fe\u8def\u4e0a\uff08RS232\u3001RS485\u7b49\uff09\u8fdb\u884c\u901a\u4fe1\uff08\u4ee5\u592a\u7f51ADU\u548c\u4e32\u884cADU\u7565\u6709\u4e0d\u540c\uff09\u3002\u5728\u4e32\u884c\u94fe\u8def\u4e0a\uff0cModbus\u534f\u8bae\u6709\u4e24\u79cd\u4f20\u8f93\u6a21\u5f0f\u2014\u2014ASCII\u6a21\u5f0f\u548cRTU\u6a21\u5f0f\u3002\u5176\u4e2d\uff0cASCII\u662f\u82f1\u6587\u201cAmerican Standard Code for Information Interchange\u201d\u7684\u7f29\u5199\uff0c\u4e2d\u6587\u7ffb\u8bd1\u4e3a\u201c\u7f8e\u56fd\u56fd\u5bb6\u4fe1\u606f\u4ea4\u6362\u6807\u51c6\u7f16\u7801\u201d\uff1bRTU\u662f\u82f1\u6587\u201c Remote Terminal Unit\u201d\u7684\u7f29\u5199\uff0c\u4e2d\u6587\u7ffb\u8bd1\u4e3a\u201c\u8fdc\u7a0b\u7ec8\u7aef\u8bbe\u5907\u201d\u3002\n\n\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u6765\u770b\u770bModbus\u7684\u5de5\u4f5c\u539f\u7406\u3002\n\nModbus\u91c7\u7528\u4e3b\u4ece\uff08Master-Salve\uff09\u901a\u4fe1\u6a21\u5f0f\uff0c\u4ec5\u6709\u4e3b\u8bbe\u5907\uff08Master\uff09\u80fd\u5bf9\u4f20\u8f93\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u4ece\u8bbe\u5907\uff08Slave\uff09\u6839\u636e\u4e3b\u8bbe\u5907\u7684\u8bf7\u6c42\u8fdb\u884c\u5e94\u7b54\u3002\u5178\u578b\u7684\u4e3b\u8bbe\u5907\u5305\u62ec\u73b0\u573a\u4eea\u8868\u548c\u663e\u793a\u9762\u677f\uff0c\u5178\u578b\u7684\u4ece\u8bbe\u5907\u4e3a\u53ef\u7f16\u7a0b\u903b\u8f91\u63a7\u5236\u5668\uff08PLC\uff09\u3002\n\n\u5728\u4e32\u884c\u94fe\u8def\u7684\u4e3b\u4ece\u901a\u4fe1\u4e2d\uff0cModbus\u4e3b\u8bbe\u5907\u53ef\u4ee5\u8fde\u63a5\u4e00\u4e2a\u6216N\uff08\u6700\u5927\u4e3a247\uff09\u4e2a\u4ece\u8bbe\u5907\uff0c\u4e3b\u4ece\u8bbe\u5907\u4e4b\u95f4\u7684\u901a\u4fe1\u5305\u62ec\u5355\u64ad\u6a21\u5f0f\u548c\u5e7f\u64ad\u6a21\u5f0f\u3002\n\n\u5728\u5e7f\u64ad\u6a21\u5f0f\u4e2d\uff0cModbus\u4e3b\u8bbe\u5907\u53ef\u540c\u65f6\u5411\u591a\u4e2a\u4ece\u8bbe\u5907\u53d1\u9001\u8bf7\u6c42\uff08\u8bbe\u5907\u5730\u57400\u7528\u4e8e\u5e7f\u64ad\u6a21\u5f0f\uff09\uff0c\u4ece\u8bbe\u5907\u5bf9\u5e7f\u64ad\u8bf7\u6c42\u4e0d\u8fdb\u884c\u54cd\u5e94\u3002\n\n\u5728\u5355\u64ad\u6a21\u5f0f\u4e2d\uff0c\u4e3b\u8bbe\u5907\u53d1\u9001\u8bf7\u6c42\u81f3\u67d0\u4e2a\u7279\u5b9a\u7684\u4ece\u8bbe\u5907\uff08\u6bcf\u4e2aModbus\u4ece\u8bbe\u5907\u5177\u6709\u552f\u4e00\u5730\u5740\uff09\uff0c\u8bf7\u6c42\u7684\u6d88\u606f\u5e27\u4e2d\u4f1a\u5305\u542b\u529f\u80fd\u4ee3\u7801\u548c\u6570\u636e\uff0c\u6bd4\u5982\u529f\u80fd\u4ee3\u7801\u201c01\u201d\u7528\u6765\u8bfb\u53d6\u79bb\u6563\u91cf\u7ebf\u5708\u7684\u72b6\u6001\u3002\u4ece\u8bbe\u5907\u63a5\u5230\u8bf7\u6c42\u540e\uff0c\u8fdb\u884c\u5e94\u7b54\u5e76\u628a\u6d88\u606f\u53cd\u9988\u4e3b\u8bbe\u5907\u3002\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/11\/20250925133311300.jpg)\n\n\u5728\u4e3b\u4ece\u8bbe\u5907\u7684\u901a\u4fe1\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528ASCII\u6a21\u5f0f\u6216\u8005RTU\u6a21\u5f0f\u3002\n\n\u5728ASCII\uff08AmericanStandard Code for Information Interchange\uff09\u4f20\u8f93\u6a21\u5f0f\u4e0b\uff0c\u6d88\u606f\u5e27\u4ee5\u82f1\u6587\u5192\u53f7\uff08\u201c\uff1a\u201d\uff0cASCII3A Hex\uff09\u5f00\u59cb\uff0c\u4ee5\u56de\u8f66\u548c\u6362\u53f7\uff08CRLF\uff0cASCII 0D and 0A Hex\uff09\u7b26\u53f7\u7ed3\u675f\uff0c\u5141\u8bb8\u7684\u4f20\u8f93\u7684\u5b57\u7b26\u96c6\u4e3a\u5341\u516d\u8fdb\u5236\u76840~9\u548cA~F\uff1b\u7f51\u7edc\u4e2d\u7684\u4ece\u8bbe\u5907\u76d1\u89c6\u4f20\u8f93\u901a\u8def\u4e0a\u662f\u5426\u6709\u82f1\u6587\u5192\u53f7\uff08\u201c\uff1a\u201d\uff09\uff0c\u5982\u679c\u6709\u7684\u8bdd\uff0c\u5c31\u5bf9\u6d88\u606f\u5e27\u8fdb\u884c\u89e3\u7801\uff0c\u67e5\u770b\u6d88\u606f\u4e2d\u7684\u5730\u5740\u662f\u5426\u4e0e\u81ea\u5df1\u7684\u5730\u5740\u76f8\u540c\uff0c\u5982\u679c\u76f8\u540c\u7684\u8bdd\uff0c\u5c31\u63a5\u6536\u5176\u4e2d\u7684\u6570\u636e\uff1b\u5982\u679c\u4e0d\u540c\u7684\u8bdd\uff0c\u5219\u4e0d\u4e88\u7406\u4f1a\u3002\n\n\u5728ASCII\u6a21\u5f0f\u4e0b\uff0c\u6bcf\u4e2a8\u4f4d\u7684\u5b57\u8282\u88ab\u62c6\u5206\u6210\u4e24\u4e2aASCII\u5b57\u7b26\u8fdb\u884c\u53d1\u9001\uff0c\u6bd4\u5982\u5341\u516d\u8fdb\u5236\u65700xAF ,\u4f1a\u88ab\u5206\u89e3\u6210ASCII\u5b57\u7b26\u201cA\u201d\u548c\u201cF\u201d\u8fdb\u884c\u53d1\u9001\uff0c\u53d1\u9001\u7684\u5b57\u7b26\u91cf\u6bd4RTU\u589e\u52a0\u4e00\u500d\u3002ASCII\u6a21\u5f0f\u7684\u597d\u5904\u662f\u5141\u8bb8\u4e24\u4e2a\u5b57\u7b26\u4e4b\u95f4\u95f4\u9694\u7684\u65f6\u95f4\u957f\u8fbe1s\u800c\u4e0d\u5f15\u53d1\u901a\u4fe1\u6545\u969c\uff0c\u8be5\u6a21\u5f0f\u91c7\u7528\u7eb5\u5411\u5197\u4f59\u6821\u9a8c\uff08Longitudinal Redundancy Check \uff0cLRC)\uff09 \u7684\u65b9\u6cd5\u6765\u68c0\u9a8c\u9519\u8bef\uff0c\n\n\u5f53\u63a7\u5236\u5668\u8bbe\u4e3a\u5728Modbus \u7f51\u7edc\u4e0a\u4ee5\uff32TU \u6a21\u5f0f\u901a\u4fe1\uff0c\u6d88\u606f\u4e2d\u7684\u6bcf\u4e2a8Bit \u5b57\u8282\u90fd\u5305\u542b\u4e24\u4e2a4 Bit \u7684\u5341\u516d\u8fdb\u5236\u5b57\u7b26\uff0c\u8fd9\u79cd\u6a21\u5f0f\u6ca1\u6709\u5f00\u59cb\u548c\u7ed3\u675f\u6807\u8bb0\u3002\u5176\u4f18\u70b9\u662f: \u5728\u540c\u6837\u7684\u6ce2\u7279\u7387\u4e0b\uff0c\u53ef\u6bd4\u4f20\u9001\u66f4\u591a\u7684\u6570\u636e\u3002\n\n\u5728RTU\uff08RemoteTerminal Unit\uff09\u6a21\u5f0f\u4e0b\uff0c\u6bcf\u4e2a\u5b57\u8282\u53ef\u4ee5\u4f20\u8f93\u4e24\u4e2a\u5341\u516d\u8fdb\u5236\u5b57\u7b26\uff0c\u6bd4\u5982\u5341\u516d\u8fdb\u5236\u65700xAF\uff0c\u76f4\u63a5\u4ee5\u5341\u516d\u8fdb\u52360xAF\uff08\u4e8c\u8fdb\u5236\uff1a10101111\uff09\u8fdb\u884c\u53d1\u9001\uff0c\u56e0\u6b64\u5b83\u7684\u53d1\u9001\u5bc6\u5ea6\u6bd4ASCII\u6a21\u5f0f\u9ad8\u4e00\u500d\uff1bRTU\u6a21\u5f0f\u91c7\u7528\u5faa\u73af\u5197\u4f59\u6821\u9a8c\uff08CRC\uff09\uff0c\u4e0b\u9762\u662f\u5bf9RTU\u6a21\u5f0f\u7684\u603b\u7ed3\uff1a\n\n\u5177\u4f53\u683c\u5f0f\u5982\u56fe \u6240\u793a\u3002\n\n06 Modbus TCP\u53ca\u5176\u6ce8\u610f\u70b9\n\n6.1 \u4e3b\u673a\u548c\u4ece\u673a\u3001\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\n\n\u3010\u5728modbus\u534f\u8bae\u4e2d\u3011\n\n\u4e3b\u673a\u53d1\u9001modbus\u8bf7\u6c42\uff0c\u4ece\u673a\u6839\u636e\u8bf7\u6c42\u5185\u5bb9\u5411\u4e3b\u673a\u8fd4\u56de\u54cd\u5e94\u3002\u5728modbus\u534f\u8bae\u4e2d\uff0c\u4e3b\u673a\u603b\u662f\u4e3b\u52a8\u65b9\uff0c\u4ece\u673a\u603b\u662f\u88ab\u52a8\u65b9\u3002\n\n\u3010\u5728\u7f51\u7edc\u5e94\u7528\u4e2d\u3011\n\n\u5728\u7f51\u7edc\u5e94\u7528\u4e2d\u5b58\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\uff0c\u5ba2\u6237\u7aef\uff08\u4f8b\u5982\u6d4f\u89c8\u5668\uff09\u53d1\u9001\u8bf7\u6c42\u5230\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u8fd4\u56de\u5185\u5bb9\uff08\u4f8b\u5982HTML\u6587\u672c\uff09\u3002\n\n\u3010\u5728modbus tcp\u4e2d\u3011\n\n\u4e3b\u673a\u662f\u5ba2\u6237\u7aef\uff0c\u800c\u4ece\u673a\u662f\u670d\u52a1\u5668\u7aef\u3002\u5343\u4e07\u4e0d\u8981\u4ee5\u4e3a\u670d\u52a1\u5668\u7aef\u91cd\u8981\uff0c\u4e3b\u673a\u4e5f\u91cd\u8981\uff0c\u6240\u4ee5\u4e3b\u673a\u5c31\u662f\u670d\u52a1\u5668\u7aef\u3002\n\n6.2 \u662f\u5426\u53ef\u4ee5\u591a\u4e3b\u673a\n\n    \u901a\u8fc7\u524d\u9762\u7684\u5206\u6790\uff0c\u4e3b\u673a\u4e3a\u5ba2\u6237\u7aef\u90a3\u4e48modbustcp\u652f\u6301\u591a\u4e2a\u4e3b\u673a\uff0c\u5728\u4e00\u4e2a   \u5c40\u57df\u7f51\u4e2d\u53ef\u5b58\u5728\u591a\u4e2a\u4e3b\u673a\u548c\u591a\u4e2a\u4ece\u673a\u3002\u4ece\u673a\u7684\u8fde\u63a5\u80fd\u529b\uff08\u8fde\u63a5\u4e3b\u673a\u7684\u6570   \u91cf\uff09\u7531uIP\u7684\u6700\u5927TCP\u8fde\u63a5\u4e2a\u6570\u51b3\u5b9a\u3002\n\n6.3 modbus TCP\u534f\u8bae\u7b80\u8ff0\n\nmodbus TCP\u548cmodbus RTU\u57fa\u672c\u76f8\u540c\uff0c\u4f46\u662f\u4e5f\u5b58\u5728\u4e00\u4e9b\u533a\u522b\n\na.\u4ece\u673a\u5730\u5740\u53d8\u5f97\u4e0d\u518d\u91cd\u8981\uff0c\u591a\u6570\u60c5\u51b5\u4e0b\u5ffd\u7565\u3002\u4ece\u67d0\u79cd\u610f\u4e49\u4e0a\u8bf4\u4ece\u673a\u5730\u5740\u88abIP\u5730\u5740\u53d6\u4ee3\n\nb.CRC\u6821\u9a8c\u53d8\u5f97\u4e0d\u518d\u91cd\u8981\uff0c\u751a\u81f3\u53ef\u4ee5\u5ffd\u7565\u3002\u7531\u4e8eTCP\u6570\u636e\u5305\u4e2d\u5df2\u7ecf\u5b58\u5728\u6821\u9a8c\uff0c\u4e3a\u4e86\u4e0d\u91cd\u590d\u9020\u8f6e\u5b50\uff0cmodbus TCP\u5e72\u8106\u53d6\u6d88\u4e86CRC\u6821\u9a8c\u3002\n\nTCP \u6a21\u5f0f\u662f\u4e3a\u4e86\u8ba9Modbus \u6570\u636e\u987a\u5229\u5728\u4ee5\u592a\u7f51\u4e0a\u4f20\u8f93\u4ea7\u751f\u7684\uff0c\u4f7f\u7528TCP502 \u7aef\u53e3\u3002\u8be5\u534f\u8bae\u7269\u7406\u5c42\uff0c\u6570\u636e\u94fe\u8def\u5c42\uff0c\u7f51\u7edc\u5c42\uff0c\u4f20\u8f93\u5c42\u90fd\u662f\u57fa\u4e8eTCP \u534f\u8bae\uff0c\u53ea\u5728\u5e94\u7528\u5c42\uff0c\u5c06Modbus \u534f\u8bae\u4fee\u6539\u540e\u5c01\u88c5\u8fdb\u53bb; \u63a5\u6536\u7aef\u5c06\u8be5TCP \u6570\u636e\u5305\u62c6\u5c01\u540e\uff0c\u91cd\u65b0\u83b7\u5f97\u539f\u59cbModbus \u5e27\uff0c\u7136\u540e\u6309\u7167Modbus \u534f\u8bae\u89c4\u8303\u8fdb\u884c\u89e3\u6790\uff0c\u5e76\u5c06\u8fd4\u56de\u7684\u6570\u636e\u5305\u91cd\u65b0\u5c01\u88c5\u8fdbTCP \u534f\u8bae\u4e2d\uff0c\u8fd4\u56de\u5230\u53d1\u9001\u7aef\u3002\u4e0e\u4e32\u884c\u94fe\u8def\u4f20\u8f93\u7684\u6570\u636e\u683c\u5f0f\u4e0d\u540c\uff0cTCP \u6a21\u5f0f\u53bb\u9664\u4e86\u9644\u52a0\u5730\u5740\u548c\u6821\u9a8c\uff0c\u589e\u52a0\u4e86\u62a5\u6587\u5934\uff0c\u5176\u5177\u4f53\u683c\u5f0f\u5982\u56fe4\u6240\u793a\u3002\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/11\/20250925133312981.jpg)\n\n\u5728modbus TCP\u4e2d\u5305\u542b\u4e00\u4e2aMBAP\u5934\uff0c\u8be5\u5934\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206\n\n\u3010\u6ce8\u610f\u3011\n\n\u30101\u3011\u4f20\u8f93\u6807\u5fd7\u53ef\u7406\u89e3\u4e3a\u5e8f\u5217\u53f7\uff0c\u9632\u6b62 MODBUS TCP\u901a\u4fe1\u9519\u4f4d\uff0c\u4f8b\u5982\u540e\u53d1\u751f\u7684\u54cd\u5e94\u5148\u5230\u4e86\u4e3b\u673a\uff0c\u800c\u65e9\u53d1\u751f\u7684\u54cd\u5e94\u540e\u5230\u4e3b\u673a\n\n\u30102\u3011\u5355\u5143\u6807\u5fd7\u53ef\u7406\u89e3\u4e3a\u4ece\u673a\u5730\u5740\uff0c\u6b64\u65f6\u5df2\u7ecf\u4e0d\u518d\u91cd\u8981\n\n6.4 modbus tcp \u548c TCP IP\u7684\u5173\u7cfb\n\nmodbus TCP\u53ef\u4ee5\u7406\u89e3\u4e3a\u53d1\u751f\u5728TCP\u4e0a\u7684\u5e94\u7528\u5c42\u534f\u8bae\uff0c\u65e2\u7136\u662fTCP\u534f\u8bae\u90a3\u4e48\u4e00\u4e2a\u5b8c\u6574\u7684MODBUSTCP\u62a5\u6587\u5fc5\u7136\u5305\u62ecTCP\u9996\u90e8\uff0cIP\u9996\u90e8\u548cEthernet\u9996\u90e8\u3002\n\n07 \u529f\u80fd\u7801\u4f5c\u7528\n\n\u542f\u52a8Modbus\u4e8b\u52a1\u5904\u7406\u7684\u5ba2\u6237\u673a\u521b\u5efaModbus\u5e94\u7528\u6570\u636e\u5355\u5143\u3002\u529f\u80fd\u7801\uff08PDU\u4e2d\u7684\uff09\u5411\u670d\u52a1\u5668\u6307\u793a\u5c06\u6267\u884c\u54ea\u79cd\u64cd\u4f5c\u3002\n\n\u7528\u4e00\u4e2a\u5b57\u8282\u7f16\u7801Modbus\u6570\u636e\u5355\u5143\u7684\u529f\u80fd\u7801\u57df\u3002\u6709\u6548\u8303\u56f4\u662f\u5341\u5236\u52361-255\uff08128-255\u4e3a\u5f02\u5e38\u54cd\u5e94\u4fdd\u7559\uff09\u3002\u5f53\u4ece\u5ba2\u6237\u673a\u5411\u670d\u52a1\u5668\u53d1\u9001\u62a5\u6587\u65f6\uff0c\u529f\u80fd\u7801\u57df\u901a\u8fc7\u670d\u52a1\u5668\u6267\u884c\u54ea\u79cd\u64cd\u4f5c\u3002\n\n\u4ece\u5ba2\u6237\u673a\u5411\u670d\u52a1\u5668\u53d1\u9001\u7684\u62a5\u6587\u6570\u636e\u57df\u5305\u62ec\u9644\u52a0\u4fe1\u606f\uff0c\u670d\u52a1\u5668\u4f7f\u7528\u8fd9\u4e2a\u4fe1\u606f\u6267\u884c\u529f\u80fd\u7801\u5b9a\u4e49\u7684\u64cd\u4f5c\u3002\u8fd9\u4e2a\u57df\u8fd8\u5305\u62ec\u79bb\u6563\u9879\u76ee\u548c\u5bc4\u5b58\u5668\u5730\u5740\u3001\u5904\u7406\u9879\u76ee\u7684\u6570\u91cf\u4ee5\u53ca\u57df\u4e2d\u7684\u5b9e\u9645\u6570\u636e\u5b57\u8282\u6570\u3002\n\n\u5728\u67d0\u79cd\u8bf7\u6c42\u4e2d\uff0c\u6570\u636e\u57df\u53ef\u4ee5\u662f\u4e0d\u5b58\u5728\u7684\uff0c\u5728\u6b64\u60c5\u51b5\u4e0b\u670d\u52a1\u5668\u4e0d\u9700\u8981\u4efb\u4f55\u9644\u52a0\u4fe1\u606f\u3002\u529f\u80fd\u7801\u4ec5\u8bf4\u660e\u64cd\u4f5c\u3002\n\n\u529f\u80fd\u7801\u7684\u7c7b\u578b\n\n\u529f\u80fd\u7801\u4e3b\u8981\u5206\u4e3a\u6709\u6548\u529f\u80fd\u7801\u3001\u5f02\u5e38\u529f\u80fd\u7801\u548c\u9519\u8bef\u529f\u80fd\u7801\u3002\n\n\u5982\u679c\u5728\u4e00\u4e2a\u6b63\u786e\u63a5\u6536Modbus ADU\u4e2d\uff0c\u4e0d\u51fa\u73b0\u4e0e\u8bf7\u6c42Modbus\u529f\u80fd\u6709\u5173\u7684\u5dee\u9519\uff0c\u90a3\u4e48\u670d\u52a1\u5668\u81f3\u5ba2\u6237\u673a\u7684\u54cd\u5e94\u6570\u636e\u4f1a\u5305\u542b\u8bf7\u6c42\u4e2d\u7684\u6b63\u5e38\u529f\u80fd\u7801\u3002\u5982\u679c\u51fa\u73b0\u4e0e\u8bf7\u6c42Modbus\u529f\u80fd\u6709\u5173\u7684\u5dee\u9519\uff0c\u90a3\u4e48\u54cd\u5e94\u6570\u636e\u4f1a\u5305\u542b\u4e00\u4e2a\u5f02\u5e38\u7801\u548c\u9519\u8bef\u7801\u3002\n\n\u4f8b\u5982\uff0c\u5ba2\u6237\u673a\u80fd\u591f\u8bfb\u4e00\u7ec4\u79bb\u6563\u91cf\u8f93\u51fa\u6216\u8f93\u5165\u7684\u5f00\/\u5173\u72b6\u6001\uff0c\u6216\u8005\u7528\u6237\u80fd\u591f\u8bfb\/\u5199\u4e00\u7ec4\u5bc4\u5b58\u5668\u6570\u636e\u5185\u5bb9\u3002\u5f53\u670d\u52a1\u5668\u5bf9\u5ba2\u6237\u673a\u54cd\u5e94\u65f6\uff0c\u5b83\u4f7f\u7528\u529f\u80fd\u7801\u57df\u6765\u6307\u793a\u6b63\u5e38\uff08\u65e0\u5dee\u9519\uff09\u54cd\u5e94\u6216\u51fa\u73b0\u67d0\u79cd\u5dee\u9519\uff08\u79f0\u4e3a\u5f02\u5e38\u54cd\u5e94\uff09\u3002\u5bf9\u4e8e\u4e00\u4e2a\u6b63\u5e38\u54cd\u5e94\u6765\u8bf4\uff0c\u670d\u52a1\u5668\u4ec5\u5bf9\u539f\u59cb\u529f\u80fd\u7801\u54cd\u5e94\uff0c\u5982\u4e0b\u56fe\uff1a\n\n\u5bf9\u4e8e\u5f02\u5e38\u54cd\u5e94\uff0c\u670d\u52a1\u5668\u8fd4\u56de\u4e00\u4e2a\u4e0e\u5ba2\u6237\u673a\u7b49\u540c\u7684\u7801\uff0c\u8bbe\u7f6e\u8be5\u539f\u59cb\u529f\u80fd\u7801\u7684\u6700\u9ad8\u6709\u6548\u4f4d\u4e3a\u903b\u8f911\uff0c\u5e76\u52a0\u8be5\u5f02\u5e38\u7801\u540e\u589e\u52a0\u9519\u8bef\u7801\uff0c\u4ee5\u901a\u77e5\u5ba2\u6237\u673a\u5f02\u5e38\u539f\u56e0\u3002\u5982\u4e0b\u56fe\uff1a\n\n\u6709\u6548\u529f\u80fd\u7801\n\n\u6709\u6548\u529f\u80fd\u7801\u6709\u4e8c\u5341\u51e0\u79cd\uff0c\u4f46\u662f\u4e00\u822c\u4f7f\u7528\u4e0a\u90fd\u4ee51\u30012\u30013\u30014\u30015\u30016\u300115\u300116\u7b49\u516b\u79cd\u6700\u4e3a\u5e38\u7528\uff0c\u4ee5\u53ca\u53e6\u5916\u7279\u6b8a\u4f7f\u7528\u768420\u300121\u4e24\u79cd\uff0c\u6b64\u4e3aGeneral Reference Register\uff0c\u7edd\u5927\u90e8\u4efd\u7684Modbus\u8bbe\u5907\u5e76\u4e0d\u4f1a\u63d0\u4f9b\u6b64Register\u3002\u4e8ePLC\u4e0a\u4e3b\u8981\u7684\u63a7\u5236\u6570\u636e\u6709\u4e0b\u5217\u56db\u79cd\u578b\u5f0f\u3002\u6b64\u516b\u79cd\u529f\u80fd\u7801\u5c31\u662f\u5904\u7406\u8fd9\u4e9b\u63a7\u5236\u8d44\u6599\uff0c\u8be6\u7ec6\u8bf4\u660e\u5982\u4e0b\u5404\u70b9\uff1a\n\n\u63a7\u5236\u6570\u636e\u56db\u79cd\u578b\u5f0f\uff1a\n\nDI\uff1aDigitalInput\uff08\u6570\u5b57\u8f93\u5165\uff0c\u79bb\u6563\u8f93\u5165\uff09\uff0c\u4e00\u4e2a\u5730\u5740\u4e00\u4e2a\u6570\u636e\u4f4d\uff0c\u7528\u6237\u53ea\u80fd\u8bfb\u53d6\u5b83\u7684\u72b6\u6001\uff0c\u4e0d\u80fd\u4fee\u6539\u3002\u4ee5\u4e00\u4e2a bit\u8868\u793a On\/Off\uff0c\u7528\u6765\u8bb0\u5f55\u63a7\u5236\u4fe1\u53f7\u7684\u72b6\u6001\u8f93\u5165\uff0c\u4f8b\u5982\uff1a\u5f00\u5173\uff0c\u63a5\u89e6\u70b9\uff0c\u9a6c\u8fbe\u8fd0\u8f6c\uff0c\u8d85\u9650switch\u2026\u7b49\u7b49\u3002\u4e8ePLC\u4e0a\u88ab\u79f0\u4e3aInput relay\u3001input coil\u7b49\u3002\n\nDO\uff1aDigitalOutput\uff08\u6570\u5b57\u8f93\u51fa\uff0c\u7ebf\u5708\u8f93\u51fa\uff09\uff0c\u4e00\u4e2a\u5730\u5740\u4e00\u4e2a\u6570\u636e\u4f4d\uff0c\u7528\u6237\u53ef\u4ee5\u7f6e\u4f4d\u3001\u590d\u4f4d\uff0c\u53ef\u4ee5\u56de\u8bfb\u72b6\u6001\u3002\u4ee5\u4e00\u4e2a bit\u8868\u793a On\/Off\uff0c\u7528\u6765\u8f93\u51fa\u63a7\u5236\u4fe1\u53f7\uff0c\u4ee5\u6fc0\u6d3b\u6216\u505c\u6b62\u9a6c\u8fbe\uff0c\u8b66\u94c3\uff0c\u706f\u5149\u2026\u7b49\u7b49\u3002\u4e8ePLC\u4e0a\u88ab\u79f0\u4e3aOutput relay\u3001Output coil\u7b49\u3002\n\nAI\uff1aAnalog Input\uff08\u6a21\u62df\u8f93\u5165\uff0c\u8f93\u5165\u5bc4\u5b58\u5668\uff09\uff0c\u4e00\u4e2a\u5730\u574016\u4f4d\u6570\u636e\uff0c\u7528\u6237\u53ea\u80fd\u8bfb\uff0c\u4e0d\u80fd\u4fee\u6539\uff0c\uff0c\u4ee516 bits integer\u8868\u793a\u4e00\u4e2a\u6570\u503c\uff0c\u7528\u6765\u8bb0\u5f55\u63a7\u5236\u4fe1\u53f7\u7684\u6570\u503c\u8f93\u5165\uff0c\u4f8b\u5982\uff1a\u6e29\u5ea6\u3001\u6d41\u91cf\u3001\u6599\u91cf\u3001\u901f\u5ea6\u3001\u8f6c\u901f\u3001\u6587\u4ef6\u677f\u5f00\u5ea6\u3001\u6db2\u4f4d\u3001\u91cd\u91cf\u2026\u7b49\u7b49\u3002\u4e8ePLC\u4e0a\u88ab\u79f0\u4e3aInput register\u3002\n\nAO\uff1aAnalogOutput\uff08\u6a21\u62df\u8f93\u51fa\uff0c\u4fdd\u6301\u5bc4\u5b58\u5668\uff09\uff0c\u4e00\u4e2a\u5730\u574016\u4f4d\u6570\u636e\uff0c\u7528\u6237\u53ef\u4ee5\u5199\uff0c\u4e5f\u53ef\u4ee5\u56de\u8bfb\uff0c\u4ee516 bits integer\u8868\u793a\u4e00\u4e2a\u6570\u503c\uff0c\u7528\u6765\u8f93\u51fa\u63a7\u5236\u4fe1\u53f7\u7684\u6570\u503c\uff0c\u4f8b\u5982\uff1a\u6e29\u5ea6\u3001\u6d41\u91cf\u3001\u901f\u5ea6\u3001\u8f6c\u901f\u3001\u6587\u4ef6\u677f\u5f00\u5ea6\u3001\u9972\u6599\u91cf\u2026\u7b49\u7b49\u8bbe\u5b9a\u503c\u3002\u4e8ePLC\u4e0a\u88ab\u79f0\u4e3aOutput register\u3001Holding register\u3002\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/11\/20250925133313845.jpg)\n\n08 Modbus\u534f\u8bae\u5b89\u5168\u5206\u6790\n\nModbus \u534f\u8bae\u662f\u5178\u578b\u7684\u5de5\u63a7\u7f51\u534f\u8bae\uff0c\u7814\u7a76\u5176\u5b89\u5168\u6027\u5bf9\u4e8e\u52a0\u5f3a\u5de5\u4e1a\u63a7\u5236\u7f51\u7edc\u7684\u5b89\u5168\u6027\u6709\u91cd\u8981\u610f\u4e49\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u534f\u8bae\u5b89\u5168\u6027\u95ee\u9898\u53ef\u4ee5\u5206\u4e3a\u4e24\u79cd\uff0c\u4e00\u79cd\u662f\u534f\u8bae\u81ea\u8eab\u7684\u8bbe\u8ba1\u548c\u63cf\u8ff0\u5f15\u8d77\u7684\u5b89\u5168\u95ee\u9898; \u53e6\u4e00\u79cd\u662f\u534f\u8bae\u7684\u4e0d\u6b63\u786e\u5b9e\u73b0\u5f15\u8d77\u7684\u5b89\u5168\u95ee\u9898\u3002Modbus \u534f\u8bae\u4e5f\u5b58\u5728\u7740\n\n\u8fd9\u4e24\u65b9\u9762\u7684\u95ee\u9898\u3002\n\n8.1Modbus \u534f\u8bae\u7684\u56fa\u6709\u95ee\u9898\n\n\u7edd\u5927\u591a\u6570\u5de5\u63a7\u534f\u8bae\u5728\u8bbe\u8ba1\u4e4b\u521d\uff0c\u4ec5\u4ec5\u8003\u8651\u4e86\u529f\u80fd\u5b9e\u73b0\u3001\u63d0\u9ad8\u6548\u7387\u3001\u63d0\u9ad8\u53ef\u9760\u6027\u7b49\u65b9\u9762\uff0c\u800c\u6ca1\u8003\u8651\u8fc7\u5b89\u5168\u6027\u95ee\u9898\u3002Modbus \u534f\u8bae\u4e5f\u4e0d\u4f8b\u5916\uff0c\u5c3d\u7ba1\u5176\u5df2\u7ecf\u6210\u4e3a\u4e8b\u5b9e\u4e0a\u7684\u5de5\u4e1a\u6807\u51c6\u3002\u4ece\u524d\u9762\u539f\u7406\u5206\u6790\u53ef\u4ee5\u770b\u51fa\u5176\u672c\u8eab\u7684\u5b89\u5168\u6027\u95ee\u9898\u662f: \u7f3a\u4e4f\u8ba4\u8bc1\u3001\u6388\u6743\u3001\u52a0\u5bc6\u7b49\u5b89\u5168\u9632\u62a4\u673a\u5236\u548c\u529f\u80fd\u7801\u6ee5\u7528\u95ee\u9898\u3002\n\n( 1) \u7f3a\u4e4f\u8ba4\u8bc1\n\n\u8ba4\u8bc1\u7684\u76ee\u7684\u662f\u4fdd\u8bc1\u6536\u5230\u7684\u4fe1\u606f\u6765\u81ea\u5408\u6cd5\u7684\u7528\u6237\uff0c\u672a\u8ba4\u8bc1\u7528\u6237\u5411\u8bbe\u5907\u53d1\u9001\u63a7\u5236\u547d\u4ee4\u4e0d\u4f1a\u88ab\u6267\u884c\u3002\u5728Modbus \u534f\u8bae\u901a\u4fe1\u8fc7\u7a0b\u4e2d\uff0c\u6ca1\u6709\u4efb\u4f55\u8ba4\u8bc1\u65b9\u9762\u7684\u76f8\u5173\u5b9a\u4e49\uff0c\u653b\u51fb\u8005\u53ea\u9700\u8981\u627e\u5230\u4e00\u4e2a\u5408\u6cd5\u7684\u5730\u5740\u5c31\u53ef\u4ee5\u4f7f\u7528\u529f\u80fd\u7801\u5c31\u80fd\u5efa\u7acb\u4e00\u4e2aModbus \u901a\u4fe1\u4f1a\u8bdd\uff0c\u4ece\u800c\u6270\u4e71\u6574\u4e2a\u6216\u8005\u90e8\u5206\u63a7\u5236\u8fc7\u7a0b\u3002\n\n( 2) \u7f3a\u4e4f\u6388\u6743\n\n\u6388\u6743\u662f\u4fdd\u8bc1\u4e0d\u540c\u7684\u7279\u6743\u64cd\u4f5c\u9700\u8981\u7531\u62e5\u6709\u4e0d\u540c\u6743\u9650\u7684\u8ba4\u8bc1\u7528\u6237\u6765\u5b8c\u6210\uff0c\u8fd9\u6837\u53ef\u5927\u5927\u964d\u4f4e\u8bef\u64cd\u4f5c\u4e0e\u5185\u90e8\u653b\u51fb\u7684\u6982\u7387\u3002\u76ee\u524d\uff0cModbus \u534f\u8bae\u6ca1\u6709\u57fa\u4e8e\u89d2\u8272\u7684\u8bbf\u95ee\u63a7\u5236\u673a\u5236\uff0c\u4e5f\u6ca1\u6709\u5bf9\u7528\u6237\u5206\u7c7b\uff0c\u6ca1\u6709\u5bf9\u7528\u6237\u7684\u6743\u9650\u8fdb\u884c\u5212\u5206\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u4efb\u610f\u7528\u6237\u53ef\u4ee5\u6267\u884c\u4efb\u610f\u529f\u80fd\u3002\n\n( 3) \u7f3a\u4e4f\u52a0\u5bc6\n\n\u52a0\u5bc6\u53ef\u4ee5\u4fdd\u8bc1\u901a\u4fe1\u8fc7\u7a0b\u4e2d\u53cc\u65b9\u7684\u4fe1\u606f\u4e0d\u88ab\u7b2c\u4e09\u65b9\u975e\u6cd5\u83b7\u53d6\u3002Modbus \u534f\u8bae\u901a\u4fe1\u8fc7\u7a0b\u4e2d\uff0c\u5730\u5740\u548c\u547d\u4ee4\u5168\u90e8\u91c7\u7528\u660e\u6587\u4f20\u8f93\uff0c\u56e0\u6b64\u6570\u636e\u53ef\u4ee5\u5f88\u5bb9\u6613\u7684\u88ab\u653b\u51fb\u8005\n\n\u6355\u83b7\u548c\u89e3\u6790\uff0c\u4e3a\u653b\u51fb\u8005\u63d0\u4f9b\u4fbf\u5229\u3002\n\n( 4) \u529f\u80fd\u7801\u6ee5\u7528\n\n\u529f\u80fd\u7801\u662fModbus \u534f\u8bae\u4e2d\u7684\u4e00\u9879\u91cd\u8981\u5185\u5bb9\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u901a\u4fe1\u90fd\u5305\u542b\u529f\u80fd\u7801\u3002\u76ee\u524d\uff0c\u529f\u80fd\u7801\u6ee5\u7528\u662f\u5bfc\u81f4Modbus \u7f51\u7edc\u5f02\u5e38\u7684\u4e00\u4e2a\u4e3b\u8981\u56e0\u7d20\u3002\u4f8b\u5982\u4e0d\u5408\u6cd5\u62a5\u6587\u957f\u5ea6\uff0c\u77ed\u5468\u671f\u7684\u65e0\u7528\u547d\u4ee4\uff0c\u4e0d\u6b63\u786e\u7684\u62a5\u6587\u957f\u5ea6\uff0c\u786e\u8ba4\u5f02\u5e38\u4ee3\u7801\u5ef6\u8fdf\u7b49\u90fd\u6709\u53ef\u80fd\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u653b\u51fb\u3002\n\n8.2\u534f\u8bae\u5b9e\u73b0\u4ea7\u751f\u7684\u95ee\u9898\n\n\u867d\u7136Modbus \u534f\u8bae\u83b7\u5f97\u4e86\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u4f46\u662f\u5728\u5b9e\u73b0\u5177\u4f53\u7684\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u65f6\uff0c\u5f00\u53d1\u8005\u5e76\u4e0d\u5177\u5907\u5b89\u5168\u77e5\u8bc6\u6216\u8005\u6ca1\u6709\u610f\u8bc6\u5230\u5b89\u5168\u95ee\u9898\u3002\u8fd9\u6837\u5c31\u5bfc\u81f4\u4e86\u4f7f\u7528Modbus \u534f\u8bae\u7684\u7cfb\u7edf\u4e2d\u53ef\u80fd\u5b58\u5728\u5404\u79cd\u5404\u6837\u7684\u5b89\u5168\u6f0f\u6d1e\u3002\n\n( 1) \u8bbe\u8ba1\u5b89\u5168\u95ee\u9898\n\nModbus \u7cfb\u7edf\u5f00\u53d1\u8005\u91cd\u70b9\u5173\u6ce8\u7684\u662f\u5176\u529f\u80fd\u5b9e\u73b0\u95ee\u9898\uff0c\u5b89\u5168\u95ee\u9898\u5728\u8bbe\u8ba1\u65f6\u5f88\u5c11\u88ab\u6ce8\u610f\u5230\u3002\u8bbe\u8ba1\u5b89\u5168\u662f\u6307\u8bbe\u8ba1\u65f6\u5145\u5206\u8003\u8651\u5b89\u5168\u6027\uff0c\u89e3\u51b3Modbus \u7cfb\u7edf\u53ef\u80fd\u51fa\u73b0\u7684\u5404\u79cd\u5f02\u5e38\u548c\u975e\u6cd5\u64cd\u4f5c\u7b49\u95ee\u9898\u3002\u6bd4\u5982\u5728\u901a\u4fe1\u8fc7\u7a0b\u4e2d\uff0c\u67d0\u4e2a\u8282\u70b9\u88ab\u6076\u610f\u63a7\u5236\u540e\u53d1\u51fa\u975e\u6cd5\u6570\u636e\uff0c\u5c31\u9700\u8981\u8003\u8651\u8fd9\u4e9b\u6570\u636e\u7684\u5224\u522b\u548c\u5904\u7406\u95ee\u9898\u3002\n\n( 2) \u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\n\n\u7f13\u51b2\u533a\u6ea2\u51fa\u662f\u6307\u5728\u5411\u7f13\u51b2\u533a\u5185\u586b\u5145\u6570\u636e\u65f6\u8d85\u8fc7\u4e86\u7f13\u51b2\u533a\u672c\u8eab\u7684\u5bb9\u91cf\u5bfc\u81f4\u6ea2\u51fa\u7684\u6570\u636e\u8986\u76d6\u5728\u5408\u6cd5\u6570\u636e\u4e0a\uff0c\u8fd9\u662f\u5728\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u6700\u5e38\u89c1\u4e5f\u662f\u975e\u5e38\u5371\u9669\u7684\u6f0f\u6d1e\uff0c\u53ef\u4ee5\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\uff0c\u6216\u8005\u88ab\u653b\u51fb\u8005\u5229\u7528\u6765\u63a7\u5236\u7cfb\u7edf\u3002Modbus \u7cfb\u7edf\u5f00\u53d1\u8005\u5927\u591a\u4e0d\u5177\u5907\u5b89\u5168\u5f00\u53d1\u77e5\u8bc6\uff0c\u8fd9\u6837\u5c31\u4f1a\u4ea7\u751f\u5f88\u591a\u7684\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u4e00\u65e6\u88ab\u6076\u610f\u8005\u5229\u7528\u4f1a\u5bfc\u81f4\u4e25\u91cd\u7684\u540e\u679c\u3002\n\n( 3) Modbus TCP \u5b89\u5168\u95ee\u9898\n\n\u76ee\u524d\uff0cModbus \u534f\u8bae\u5df2\u7ecf\u53ef\u4ee5\u5728\u901a\u7528\u8ba1\u7b97\u673a\u548c\u901a\u7528\u64cd\u4f5c\u7cfb\u7edf\u4e0a\u5b9e\u73b0\uff0c\u8fd0\u884c\u4e8eTCP \/IP \u4e4b\u4e0a\u4ee5\u6ee1\u8db3\u53d1\u5c55\u9700\u8981\u3002\u8fd9\u6837\uff0cTCP \/IP \u534f\u8bae\u81ea\u8eab\u5b58\u5728\u7684\u5b89\u5168\u95ee\u9898\u4e0d\u53ef\u907f\u514d\u5730\u4f1a\u5f71\u54cd\u5230\u5de5\u63a7\u7f51\u7edc\u5b89\u5168\u3002\u975e\u6cd5\u7f51\u7edc\u6570\u636e\u83b7\u53d6\uff0c\u4e2d\u95f4\u4eba\uff0c\u62d2\u7edd\u670d\u52a1\uff0c IP \u6b3a\u9a97\uff0c\u75c5\u6bd2\u6728\u9a6c\u7b49\u5728IP \u4e92\u8054\u7f51\u4e2d\u7684\u5e38\u7528\u653b\u51fb\u624b\u6bb5\u90fd\u4f1a\u5f71\u54cdModbus \u7cfb\u7edf\u5b89\u5168\u3002\n\n8.3\u5b89\u5168\u5efa\u8bae\n\n\u76ee\u524d\uff0cModbus \u7cfb\u7edf\u91c7\u53d6\u7684\u5b89\u5168\u9632\u62a4\u63aa\u65bd\u666e\u904d\u4e0d\u8db3\uff0c\u8fd9\u91cc\u53c2\u8003\u4fe1\u606f\u5b89\u5168\u4e1a\u5185\u7814\u7a76\u5e76\u7ed3\u5408\u5de5\u63a7\u7cfb\u7edf\u81ea\u8eab\u7684\u5b89\u5168\u95ee\u9898\uff0c\u63d0\u51fa\u4e86\u4e00\u4e9b\u5b89\u5168\u5efa\u8bae\uff0c\u80fd\u591f\u6709\u6548\u5730\u964d\u4f4e\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u9762\u4e34\u7684\u5a01\u80c1\u3002\n\n( 1) \u4ece\u6e90\u5934\u5f00\u59cb\n\n\u5de5\u63a7\u7f51\u7edc\u6f0f\u6d1e\uff0c\u5f88\u5927\u4e00\u90e8\u5206\u662f\u5176\u5b9e\u73b0\u8fc7\u7a0b\u51fa\u73b0\u7684\u6f0f\u6d1e\u3002\u5982\u679c\u4ece\u6e90\u5934\u5f00\u59cb\u63a7\u5236\uff0c\u4eceModbus \u7cfb\u7edf\u7684\u9700\u6c42\u8bbe\u8ba1\u3001\u5f00\u53d1\u5b9e\u73b0\u3001\u5185\u90e8\u6d4b\u8bd5\u548c\u90e8\u7f72\u7b49\u9636\u6bb5\uff0c\u5168\u751f\u547d\u5468\u671f\u7684\u4ecb\u5165\u5b89\u5168\u624b\u6bb5\uff0c\u878d\u5165\u5b89\u5168\u8bbe\u8ba1\u3001\u5b89\u5168\u7f16\u7801\u4ee5\u53ca\u5b89\u5168\u6d4b\u8bd5\u7b49\u6280\u672f\uff0c\u53ef\u4ee5\u6781\u5927\u5730\u6d88\u9664\u5b89\u5168\u6f0f\u6d1e\uff0c\u964d\u4f4e\u6574\u4e2aModbus \u7cfb\u7edf\u7684\u5b89\u5168\u98ce\u9669\u3002\n\n( 2) \u5f02\u5e38\u884c\u4e3a\u68c0\u6d4b\n\n\u5f02\u5e38\u884c\u4e3a\u4ee3\u8868\u7740\u53ef\u80fd\u53d1\u751f\u5a01\u80c1\uff0c\u4e0d\u7ba1\u662f\u6709\u6ca1\u6709\u653b\u51fb\u8005\uff0c\u56e0\u6b64\u5f00\u53d1\u9488\u5bf9Modbus \u7cfb\u7edf\u7684\u4e13\u7528\u5f02\u5e38\u884c\u4e3a\u68c0\u6d4b\u8bbe\u5907\u53ef\u4ee5\u6781\u5927\u63d0\u9ad8\u5de5\u63a7\u7f51\u7edc\u7684\u5b89\u5168\u6027\u3002\u9488\u5bf9Modbus \u7cfb\u7edf\uff0c\u9996\u5148\u8981\u5206\u6790\u5176\u5b58\u5728\u7684\u5404\u79cd\u64cd\u4f5c\u884c\u4e3a\uff0c\u4f9d\u636e\u201c\u4e3b\u4f53\uff0c\u5730\u70b9\uff0c\u65f6\u95f4\uff0c\u8bbf\u95ee\u65b9\u5f0f\uff0c\u64cd\u4f5c\uff0c\u5ba2\u4f53\u201d\u7b49\u884c\u4e3a\u63cf\u8ff0\u6210\u4e00\u4e2a\u516d\u5143\u7ec4\u6a21\u578b; \u8fdb\u800c\u5206\u6790\u5176\u884c\u4e3a\u662f\u5426\u5c5e\u4e8e\u5f02\u5e38; \u6700\u7ec8\u51b3\u5b9a\u91c7\u53d6\u8bb0\u5f55\u6216\u8005\u62a5\u8b66\u7b49\u63aa\u65bd\u3002\n\n( 3) \u5b89\u5168\u5ba1\u8ba1\n\nModbus \u7684\u5b89\u5168\u5ba1\u8ba1\u5c31\u662f\u5bf9\u534f\u8bae\u6570\u636e\u8fdb\u884c\u6df1\u5ea6\u89e3\u7801\u5206\u6790\uff0c\u8bb0\u5f55\u64cd\u4f5c\u7684\u65f6\u95f4\u3001\u5730\u70b9\u3001\u64cd\u4f5c\u8005\u548c\u64cd\u4f5c\u884c\u4e3a\u7b49\u5173\u952e\u4fe1\u606f\uff0c\u5b9e\u73b0\u5bf9Modbus \u7cfb\u7edf\u7684\u5b89\u5168\u5ba1\u8ba1\u65e5\u5fd7\u8bb0\u5f55\u548c\u5ba1\u8ba1\u529f\u80fd\uff0c\u4ece\u800c\u63d0\u4f9b\u5b89\u5168\u4e8b\u4ef6\u7206\u53d1\u540e\u7684\u65f6\u5019\u8ffd\u67e5\u80fd\u529b\u3002\n\n( 4) \u4f7f\u7528\u7f51\u7edc\u5b89\u5168\u8bbe\u5907\n\n\u4f7f\u7528\u5165\u4fb5\u9632\u5fa1\u548c\u9632\u706b\u5899\u7b49\u7f51\u7edc\u5b89\u5168\u8bbe\u5907\u3002\u9632\u706b\u5899\u662f\u4e00\u4e2a\u4e32\u884c\u8bbe\u5907\uff0c\u901a\u8fc7\u8bbe\u7f6e\uff0c\u53ea\u5141\u8bb8\u7279\u5b9a\u7684\u5730\u5740\u8bbf\u95ee\u670d\u52a1\u7aef\uff0c\u7981\u6b62\u5916\u90e8\u5730\u5740\u8bbf\u95eeModbus \u670d\u52a1\u5668\uff0c\u53ef\u4ee5\u6709\u6548\u7684\u9632\u6b62\u5916\u90e8\u5165\u4fb5; \u5165\u4fb5\u9632\u5fa1\u8bbe\u5907\u53ef\u4ee5\u5206\u6790Modbus\u534f\u8bae\u7684\u5177\u4f53\u64cd\u4f5c\u5185\u5bb9\uff0c\u6709\u6548\u5730\u68c0\u6d4b\u5e76\u963b\u6b62\u6765\u81ea\u5185\u90e8\/\u5916\u90e8\u7684\u5f02\u5e38\u64cd\u4f5c\u548c\u5404\u79cd\u6e17\u900f\u653b\u51fb\u884c\u4e3a\uff0c\u5bf9\u5185\u7f51\u63d0\u4f9b\u4fdd\u62a4\u529f\u80fd\u3002\n\n**\u6765\u6e90\uff1a\u7f51\u7edc\u3002**\n\n---\n*modbus.cn*\n"