"# Modbus \u5f02\u5e38\u7801\u5b8c\u5168\u8bca\u65ad\u624b\u518c\uff1a7\u79cd\u6807\u51c6\u5f02\u5e38\u7801\u4e0e26\u4e2a\u771f\u5b9e\u5de5\u7a0b\u6848\u4f8b\n\n> 2026-07-01 | 2026-07-01\n> https:\/\/www.modbus.cn\/en\/45423.html\n\n**Modbus\u6280\u672f\u6587\u6863**\n\n---\n\n## \u5f02\u5e38\u5e27\u957f\u4ec0\u4e48\u6837\n\nModbus \u7684\u5f02\u5e38\u54cd\u5e94\u548c\u6b63\u5e38\u54cd\u5e94\u53ea\u6709\u4e00\u4f4d\u4e4b\u5dee\u3002\u4e3b\u7ad9\u53d1\u51fa\u8bf7\u6c42\u540e\uff0c\u4ece\u7ad9\u628a\u529f\u80fd\u7801\u7684\u6700\u9ad8\u4f4d\u7f6e 1\uff0c\u540e\u9762\u8ddf\u4e00\u4e2a\u5355\u5b57\u8282\u7684\u5f02\u5e38\u7801\uff0c\u5e27\u5c31\u7ed3\u675f\u4e86\u3002\u6ca1\u6709\u6570\u636e\u533a\u3002\n\n\u6b63\u5e38\u5e27 vs \u5f02\u5e38\u5e27\u7684\u7ed3\u6784\u5bf9\u6bd4\uff1a\n\n```\n\u8bf7\u6c42:     01 03 00 00 00 01  \u2014 \u8bfb 1 \u53f7\u7ad9\uff0c\u4fdd\u6301\u5bc4\u5b58\u5668 0x0000\n\u6b63\u5e38\u54cd\u5e94:  01 03 02 12 34    \u2014 02=\u6570\u636e\u5b57\u8282\u6570\uff0c0x1234=\u8bfb\u56de\u7684\u503c\n\u5f02\u5e38\u54cd\u5e94:  01 83 02          \u2014 83=0x03|0x80\uff0c02=\u5f02\u5e38\u7801 0x02\n```\n\n\u4e0a\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff1a\u529f\u80fd\u7801 0x03 \u7684\u6700\u9ad8\u4f4d\u7f6e 1 \u540e\u53d8\u6210 0x83\u3002\u5f02\u5e38\u7801 0x02 \u4ee3\u8868\u300c\u975e\u6cd5\u6570\u636e\u5730\u5740\u300d\u2014\u2014\u8bf4\u660e 0x0000 \u8fd9\u4e2a\u5730\u5740\u5728\u8be5\u4ece\u7ad9\u91cc\u4e0d\u5b58\u5728\u3002\n\n\u591a\u770b\u4e00\u773c CRC \u6821\u9a8c\uff1a\u4e0d\u7ba1\u6b63\u5e38\u54cd\u5e94\u8fd8\u662f\u5f02\u5e38\u54cd\u5e94\uff0cCRC \u90fd\u662f\u4ece\u7ad9\u5730\u5740\u5f00\u59cb\u7b97\u5230\u6700\u540e\u4e00\u4e2a\u6570\u636e\u5b57\u8282\uff08\u4e0d\u542b CRC \u81ea\u5df1\uff09\u3002\u4e0a\u9762\u6211\u6545\u610f\u6ca1\u5199 CRC\uff0c\u5b9e\u9645\u5e27\u672b\u5c3e\u8fd8\u6709\u4e24\u4e2a\u5b57\u8282\u3002\n\nRTU \u548c TCP \u7684\u5f02\u5e38\u5e27\u6709\u533a\u522b\uff0c\u5dee\u5f02\u5728\u5c01\u88c5\u5c42\u3002TCP \u7684 MBAP \u5934\u91cc\u6709\u4e00\u4e2a 2 \u5b57\u8282\u7684\u300c\u957f\u5ea6\u300d\u5b57\u6bb5\uff0c\u8fd9\u4e2a\u957f\u5ea6\u5305\u542b\u4e86\u5355\u5143\u6807\u8bc6\u7b26 + \u529f\u80fd\u7801 + \u5f02\u5e38\u7801\u3002\u800c RTU \u9760 3.5 \u5b57\u7b26\u9759\u9ed8\u65f6\u95f4\u6765\u5206\u9694\u5e27\u3002\u534f\u8bae\u5c42\u4e0d\u4e00\u6837\uff0c\u4f46\u529f\u80fd\u7801\u548c\u5f02\u5e38\u7801\u7684\u8bed\u4e49\u5b8c\u5168\u4e00\u6837\u2014\u2014\u8fd9\u662f Modbus \u6700\u5e72\u51c0\u7684\u8bbe\u8ba1\u4e4b\u4e00\u3002\n\n\u8fd8\u6709\u4e00\u4e2a\u7ec6\u8282\u5bb9\u6613\u88ab\u5ffd\u7565\uff1a\u5f02\u5e38\u54cd\u5e94\u7684\u5e27\u957f\u5ea6\u662f\u56fa\u5b9a\u7684\u3002\u5bf9\u529f\u80fd\u7801 0x01~0x06\uff0c\u5f02\u5e38\u54cd\u5e94\u6c38\u8fdc\u53ea\u6709 3 \u4e2a\u5b57\u8282\uff08\u5730\u5740 + \u529f\u80fd\u7801|0x80 + \u5f02\u5e38\u7801\uff09\uff0cCRC \u53e6\u7b97\u3002\u5bf9 0x0F \u548c 0x10 \u8fd9\u7c7b\u591a\u64cd\u4f5c\u529f\u80fd\u7801\uff0c\u5f02\u5e38\u54cd\u5e94\u4e5f\u662f 3 \u5b57\u8282\u3002\u4ece\u7ad9\u4e0d\u9700\u8981\u544a\u8bc9\u4f60\u300c\u54ea\u4e00\u90e8\u5206\u51fa\u9519\u4e86\u300d\uff0c\u53ea\u544a\u8bc9\u4f60\u300c\u6574\u4e2a\u8bf7\u6c42\u88ab\u62d2\u4e86\u300d\u3002\u8fd9\u4e2a\u8bbe\u8ba1\u5f88\u7c97\u66b4\uff0c\u4f46\u4e5f\u5f88\u7b80\u5355\u2014\u2014\u4e3b\u7ad9\u6536\u5230\u5f02\u5e38\u7801\u540e\u81ea\u5df1\u60f3\u529e\u6cd5\u91cd\u8bd5\u6216\u62a5\u9519\u3002\n\n\u4e32\u53e3\u5c42\u9762\u7684\u65f6\u5e8f\u4e5f\u6709\u8bb2\u7a76\u3002Modbus RTU \u89c4\u5b9a\u4ece\u7ad9\u5fc5\u987b\u5728\u6536\u5230\u8bf7\u6c42\u540e\u7684\u6307\u5b9a\u65f6\u95f4\u5185\u5f00\u59cb\u54cd\u5e94\u2014\u2014\u4f46\u6807\u51c6\u5e76\u6ca1\u6709\u786c\u6027\u89c4\u5b9a\u8fd9\u4e2a\u65f6\u95f4\u7684\u5177\u4f53\u503c\u3002\u5b9e\u8df5\u4e2d\u591a\u6570\u4ece\u7ad9\u7684\u54cd\u5e94\u65f6\u95f4\u5728 5~50ms \u4e4b\u95f4\u3002\u8d85\u8fc7 1 \u79d2\u6ca1\u6536\u5230\u54cd\u5e94\uff08\u6216\u8005\u6ca1\u6536\u5230\u5f02\u5e38\u5e27\uff09\uff0c\u4e3b\u7ad9\u5e94\u8be5\u8ba4\u4e3a\u4ece\u7ad9\u65e0\u54cd\u5e94\u2014\u2014\u8fd9\u662f\u8d85\u65f6\uff0c\u4e0d\u662f\u5f02\u5e38\u7801\u3002\u5f88\u591a\u5de5\u63a7\u8f6f\u4ef6\u628a\u300cNo Response\u300d\u548c\u300cException Response\u300d\u6df7\u5728\u4e00\u8d77\u62a5\uff0c\u7ed9\u4f60\u4e00\u79cd\u8bbe\u5907\u8fd4\u56de\u4e86\u5f02\u5e38\u7801\u7684\u9519\u89c9\u3002\u5b9e\u9645\u4e0a\u4ece\u7ad9\u6839\u672c\u6ca1\u56de\u4efb\u4f55\u4e1c\u897f\u3002\u533a\u5206\u8fd9\u4e24\u79cd\u60c5\u51b5\u5bf9\u6392\u67e5\u95ee\u9898\u81f3\u5173\u91cd\u8981\u2014\u2014\u6ca1\u54cd\u5e94\u662f\u94fe\u8def\u5c42\u6216\u8bbe\u5907\u5c42\u7684\u95ee\u9898\uff0c\u5f02\u5e38\u7801\u662f\u4ece\u7ad9\u5e94\u7528\u5c42\u5728\u544a\u8bc9\u4f60\u300c\u6211\u6536\u5230\u4e86\u4f46\u6211\u4e0d\u5e72\u300d\u3002\n\n\u4e0b\u9762\u9010\u4e2a\u62c6\u89e3 7 \u79cd\u6807\u51c6\u5f02\u5e38\u7801\u3002\u6bcf\u4e2a\u90fd\u914d\u4e86\u771f\u5b9e\u62a5\u6587\u548c\u73b0\u573a\u6848\u4f8b\u2014\u2014\u4e0d\u662f\u62ff Wireshark \u4eff\u771f\u6293\u7684\uff0c\u662f\u4ea7\u7ebf\u3001\u53d8\u7535\u7ad9\u3001\u6c34\u6cf5\u623f\u91cc\u5b9e\u5b9e\u5728\u5728\u9047\u5230\u7684\u3002\n\n## 0x01 \u2014 \u975e\u6cd5\u529f\u80fd\u7801\n\n\u4ece\u7ad9\u4e0d\u652f\u6301\u4e3b\u7ad9\u8bf7\u6c42\u7684\u529f\u80fd\u7801\uff0c\u6216\u8005\u4ece\u7ad9\u5f53\u524d\u72b6\u6001\u4e0b\u8be5\u529f\u80fd\u7801\u88ab\u7981\u7528\u4e86\u3002\n\n\u4f60\u7ed9\u4e00\u53f0\u652f\u6301 03\/06\/16 \u7684\u6807\u51c6 Modbus \u8bbe\u5907\u53d1 0x08 \u8bca\u65ad\u529f\u80fd\u7801\uff0c\u5927\u6982\u7387\u6536\u5230 0x01\u3002\u56e0\u4e3a\u8bca\u65ad\u529f\u80fd\u7801\u662f\u53ef\u9009\u7684\uff0c\u5f88\u591a\u5ec9\u4ef7 I\/O \u6a21\u5757\u6839\u672c\u6ca1\u5b9e\u73b0\u3002\n\n### \u62a5\u6587\u793a\u4f8b\n\n```\n\u8bf7\u6c42:     02 08 00 00 AA 55\n\u5f02\u5e38\u54cd\u5e94:  02 88 01\n```\n\n0x08 = \u8bca\u65ad\uff0c\u5b50\u7801 0x0000 = \u56de\u73af\u6d4b\u8bd5\uff0c\u6570\u636e 0xAA55\u3002\u4ece\u7ad9\u76f4\u63a5\u56de 0x88(0x08|0x80) + 0x01\u3002\n\n### \u6848\u4f8b 1\uff1a\u53f0\u8fbe DVP \u7cfb\u5217 PLC \u4e0d\u652f\u6301\u8bca\u65ad\u529f\u80fd\u7801\n\n\u53f0\u8fbe DVP-SX2 \u7cfb\u5217\uff0c\u56fa\u4ef6\u7248\u672c V3.8\u3002\u9879\u76ee\u4e2d\u505a RS-485 \u7ebf\u8def\u8d28\u91cf\u6d4b\u8bd5\uff0c\u7528 Modbus Poll \u7684 Test Center \u53d1 0x08 \u8bca\u65ad\uff0c\u7ed3\u679c\u8fd4\u56de\u5f02\u5e38\u7801 0x01\u3002\u7ffb\u4e86 DVP \u7684\u624b\u518c\u786e\u8ba4\uff1aDVP \u53ea\u5b9e\u73b0\u4e86 01\/03\/05\/06\/0F\/10 \u516d\u4e2a\u529f\u80fd\u7801\uff0c0x08 \u4e0d\u5728\u5176\u5217\u3002\u60f3\u8981\u8bca\u65ad\u7ebf\u8def\u8d28\u91cf\u53ea\u80fd\u7528 0x01 \u8bfb\u7ebf\u5708\u6216\u8005 0x03 \u8bfb\u5bc4\u5b58\u5668\uff0c\u901a\u8fc7\u54cd\u5e94\u65f6\u95f4\u548c\u8fde\u7eed\u6210\u529f\u7387\u95f4\u63a5\u5224\u65ad\u3002\u8fd9\u4e2a\u4e8b\u60c5\u544a\u8bc9\u6211\u4eec\uff0c\u8bca\u65ad\u529f\u80fd\u7801\u867d\u7136\u5199\u8fdb\u4e86 Modbus \u6807\u51c6\uff0c\u4f46\u4e0d\u662f\u6240\u6709\u5382\u5546\u90fd\u4e70\u8d26\u3002\n\n### \u6848\u4f8b 2\uff1a\u897f\u95e8\u5b50 S7-1200 \u505a Modbus Server \u65f6\u4e0d\u652f\u6301\u8bfb\u7ebf\u5708\n\n\u897f\u95e8\u5b50 S7-1200 \u4ece TIA Portal V14 \u5f00\u59cb\u652f\u6301 Modbus TCP Server\u3002\u4f46\u5b83\u7684\u5b9e\u73b0\u53ea\u662f\u628a DB \u5757\u6620\u5c04\u5230\u4fdd\u6301\u5bc4\u5b58\u5668\uff080x03\/0x06\/0x10\uff09\uff0c\u7ebf\u5708 0x01\/0x05\/0x0F \u538b\u6839\u6ca1\u505a\u3002\u8ddf\u4e0a\u4f4d\u673a\u8c03\u8bd5\u7684\u65f6\u5019\uff0cSCADA \u7528 0x01 \u53bb\u8bfb\u8bbe\u5907\u72b6\u6001\u5b57\uff0cS7-1200 \u76f4\u63a5\u7529\u56de\u4e00\u4e2a 0x81 + 0x01\u3002\u89e3\u51b3\u529e\u6cd5\uff1a\u628a\u7ebf\u5708\u5730\u5740\u6620\u5c04\u5230\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\u6bb5\uff0c\u4e0a\u4f4d\u673a\u6539\u7528 0x03 \u8bfb\u3002\n\n### \u6848\u4f8b 3\uff1a\u53d8\u9891\u5668\u8fd0\u884c\u65f6\u7981\u6b62\u5199\u53c2\u6570\n\n\u6c47\u5ddd MD500 \u53d8\u9891\u5668\uff0c\u8fd0\u884c\u72b6\u6001\u4e0b\u5c1d\u8bd5\u7528 0x06 \u5199\u9891\u7387\u7ed9\u5b9a\u5bc4\u5b58\u5668 0x2000\u3002\u8fd4\u56de 0x01\u3002\u4e0d\u662f\u53d8\u9891\u5668\u4e0d\u652f\u6301 0x06 \u529f\u80fd\u7801\uff0c\u800c\u662f\u5f53\u524d\u72b6\u6001\u4e0d\u5141\u8bb8\u5199\u3002\u6c47\u5ddd\u7684\u624b\u518c\u91cc\u7ba1\u8fd9\u53eb\u300c\u8fd0\u884c\u7981\u6b62\u5199\u5165\u300d\uff0c\u4f46\u534f\u8bae\u5c42\u7528\u7684\u5c31\u662f\u6807\u51c6\u5f02\u5e38\u7801 0x01\u3002\u8fd9\u79cd\u8bed\u4e49\u6269\u5c55\u5728\u5f88\u591a\u56fd\u4ea7\u8bbe\u5907\u4e0a\u90fd\u80fd\u89c1\u5230\u2014\u2014\u7528\u6807\u51c6\u5f02\u5e38\u7801\u8868\u8fbe\u5382\u5546\u81ea\u5b9a\u4e49\u7684\u9650\u5236\u6761\u4ef6\u3002\n\n### \u6848\u4f8b 4\uff1aModbus Plus \u7279\u6709\u7684\u529f\u80fd\u7801\u5728 TCP \u7f51\u5173\u4e0a\u88ab\u62d2\n\n\u4e00\u53f0\u8001\u65e7\u7684 Modicon Quantum PLC\uff0c\u901a\u8fc7 BM85 \u7f51\u6865\u505a Modbus Plus \u5230 Modbus TCP \u7684\u8f6c\u6362\u3002Modbus Plus \u6709\u81ea\u5df1\u7684\u4e00\u5957\u6269\u5c55\u529f\u80fd\u7801\uff080x14~0x18 \u7528\u4e8e\u7f51\u7edc\u7ba1\u7406\uff09\uff0c\u4f46 BM85 \u7f51\u6865\u53ea\u900f\u4f20\u6807\u51c6 Modbus \u529f\u80fd\u7801\u3002\u4e0a\u4f4d\u673a\u4e0d\u5c0f\u5fc3\u53d1\u4e86 0x14 \u8bfb PLC \u7edf\u8ba1\u4fe1\u606f\u7684\u8bf7\u6c42\uff0c\u7f51\u6865\u5728\u5e94\u7528\u5c42\u68c0\u67e5\u540e\u76f4\u63a5\u8fd4\u56de 0x81+0x01\u3002\u6ce8\u610f\u8fd9\u91cc\u8fd4\u56de\u5f02\u5e38\u7801\u7684\u662f\u7f51\u5173\uff0c\u4e0d\u662f PLC\u2014\u2014PLC \u53ef\u80fd\u652f\u6301 0x14\uff0c\u4f46\u7f51\u5173\u4e0d\u652f\u6301\u3002\u7f51\u6865\u65e5\u5fd7\u91cc\u6ca1\u6709\u8fd9\u4e2a\u529f\u80fd\u7801\u7684\u89e3\u6790\u8def\u7531\uff0c\u76f4\u63a5\u62d2\u7edd\u4e86\u3002\u7f51\u5173\u505a\u529f\u80fd\u7801\u5b89\u5168\u8fc7\u6ee4\u7684\u60c5\u51b5\u5728\u5b9e\u9645\u9879\u76ee\u91cc\u5f88\u5e38\u89c1\uff0c\u5c24\u5176\u662f\u6709\u9632\u706b\u5899\u529f\u80fd\u7684\u5de5\u4e1a\u8def\u7531\u5668\u3002\n\n## 0x02 \u2014 \u975e\u6cd5\u6570\u636e\u5730\u5740\n\n\u4ece\u7ad9\u652f\u6301\u8be5\u529f\u80fd\u7801\uff0c\u4f46\u8bf7\u6c42\u7684\u8d77\u59cb\u5730\u5740 + \u6570\u91cf\u8d85\u51fa\u4e86\u4ece\u7ad9\u7684\u6709\u6548\u5730\u5740\u8303\u56f4\u3002\u8fd9\u662f\u73b0\u573a\u8c03\u8bd5\u78b0\u5230\u6700\u591a\u7684\u5f02\u5e38\u7801\uff0c\u6ca1\u6709\u4e4b\u4e00\u3002\n\n\u5173\u952e\u70b9\uff1a\u4e3b\u7ad9\u8f6f\u4ef6\u91cc\u586b\u7684\u5730\u5740\u548c\u534f\u8bae\u5c42\u5b9e\u9645\u53d1\u9001\u7684\u5730\u5740\u6709 offset\u3002Modbus \u534f\u8bae\u89c4\u5b9a\uff0c\u5730\u5740\u4ece 0 \u5f00\u59cb\u7f16\u53f7\u3002\u4f60\u5728 Modbus Poll \u91cc\u586b\u7684 40001\uff081-based \u4fdd\u6301\u5bc4\u5b58\u5668\uff09\uff0c\u534f\u8bae\u5c42\u53d1\u7684\u662f 0x0000\u3002\u5730\u5740\u8ba1\u7b97\u903b\u8f91\u5f04\u53cd\u4e86\uff0c\u8f7b\u5219\u8bfb\u5230\u9519\u8bef\u6570\u636e\uff0c\u91cd\u5219\u89e6\u53d1 0x02\u3002\n\n```\nPLC\/SCADA \u5730\u5740\u8868\u793a:   40001 (1-based, \u4fdd\u6301\u5bc4\u5b58\u5668)\n\u534f\u8bae\u5c42 PDU \u5730\u5740:      0x0000 (0-based)\n```\n\n### \u62a5\u6587\u793a\u4f8b\n\n```\n\u8bf7\u6c42:     01 03 00 64 00 0A  \u2014 \u8bfb 0x0064 = 400101\uff0c\u8bfb 10 \u4e2a\n\u5f02\u5e38\u54cd\u5e94:  01 83 02\n```\n\n\u4ece\u7ad9\u7684\u6709\u6548\u4fdd\u6301\u5bc4\u5b58\u5668\u8303\u56f4\u662f 40001~40090\uff08\u5373 PDU \u5730\u5740 0x0000~0x0059\uff09\uff0c\u8bf7\u6c42\u7684\u8d77\u59cb\u5730\u5740 0x0064 \u8d85\u4e86\uff0c\u76f4\u63a5 0x02\u3002\n\n### \u6848\u4f8b 1\uff1aSchneider TM3 \u6269\u5c55\u6a21\u5757\u5730\u5740\u4e0d\u591f\n\nSchneider Modicon M221 \u6302\u4e86\u4e24\u5757 TM3 \u6269\u5c55\u3002\u914d\u7f6e\u91cc\u7b2c\u4e00\u5757 TM3DI16 \u5360 %IW0~%IW1\uff0c\u7b2c\u4e8c\u5757 TM3AI4 \u5360 %IW2~%IW5\u3002\u4e0a\u4f4d\u673a SCADA \u7528 0x04\uff08\u8bfb\u8f93\u5165\u5bc4\u5b58\u5668\uff09\u53bb\u8bfb %IW10\uff0c\u4ece\u7ad9\u8fd4\u56de 0x02\u3002\u539f\u56e0\u5f88\u7b80\u5355\u2014\u2014M221 \u53ea\u5206\u914d\u4e86 %IW0~%IW5\uff0c%IW10 \u4e0d\u5728\u7269\u7406 I\/O \u6620\u5c04\u91cc\u3002SoMachine \u91cc\u770b\u4e00\u773c I\/O \u6620\u5c04\u8868\u5c31\u660e\u767d\u4e86\u3002\u8fd9\u79cd\u95ee\u9898\u5c5e\u4e8e\u914d\u7f6e\u548c\u5b9e\u9645\u786c\u4ef6\u4e0d\u5339\u914d\uff0c\u4e0d\u662f\u534f\u8bae\u7f3a\u9677\u3002\n\n### \u6848\u4f8b 2\uff1aModbus Poll \u5730\u5740 40001 \u548c 400001 \u7684\u5751\n\n\u4e00\u4e2a\u65b0\u624b\u5de5\u7a0b\u5e08\u7528 Modbus Poll \u70b9\u8868\u91cc\u6284\u7684\u5730\u5740\u662f 40001\uff0cModbus Poll \u5b9e\u9645\u53d1\u7684\u662f 0x0000\uff0c\u8bfb\u5230\u7684\u662f\u8bbe\u5907\u7b2c\u4e00\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\uff0c\u6ca1\u95ee\u9898\u3002\u4f46\u540e\u6765\u6362\u4e86\u53e6\u4e00\u4e2a\u56fd\u4ea7\u7ec4\u6001\u8f6f\u4ef6\uff0c\u90a3\u4e2a\u8f6f\u4ef6\u628a 40001 \u89e3\u6790\u6210\u4e86 4000 + 1 \u7684\u504f\u79fb\u91cf\uff0c\u5b9e\u9645\u53d1\u7684\u662f 0x0FA0\u3002\u4ece\u7ad9\u6839\u672c\u6ca1\u6709\u90a3\u4e48\u591a\u5bc4\u5b58\u5668\uff0c\u8fd4\u56de 0x02\u3002\u540c\u4e00\u4efd\u70b9\u8868\u3001\u540c\u4e00\u4e2a\u4ece\u7ad9\uff0c\u4e0d\u540c\u7684\u4e3b\u7ad9\u8f6f\u4ef6\u5730\u5740\u7ea6\u5b9a\u4e0d\u4e00\u6837\uff0c\u7ed3\u679c\u5c31\u4e0d\u4e00\u6837\u3002\u8fd9\u4e0d\u662f Modbus \u534f\u8bae\u7684\u95ee\u9898\uff0c\u662f\u5de5\u5177\u94fe\u5404\u73a9\u5404\u7684\u7ea6\u5b9a\u5bfc\u81f4\u7684\u3002\u5efa\u8bae\u76f4\u63a5\u7528 PDU \u5730\u5740\uff080-based\uff09\u8ddf\u540c\u4e8b\u6c9f\u901a\uff0c\u522b\u8bf4\u4ec0\u4e48 4 \u533a 5 \u533a\uff0c\u90a3\u90fd\u662f Modicon \u7684\u8001\u9ec4\u5386\u3002\n\n### \u6848\u4f8b 3\uff1a\u8bfb\u591a\u4e2a\u5bc4\u5b58\u5668\u65f6\u672b\u5c3e\u5730\u5740\u8d8a\u754c\n\n\u4e00\u53f0 Modbus \u7535\u8868\uff0c\u4fdd\u6301\u5bc4\u5b58\u5668 0x0000~0x003F\uff0864 \u4e2a\u5bc4\u5b58\u5668\uff09\u3002\u4e3b\u7ad9\u8bf7\u6c42\u8bfb 0x0038 \u8d77 10 \u4e2a\u5bc4\u5b58\u5668\uff080x0038~0x0041\uff09\u3002\u4ece\u7ad9\u68c0\u67e5\uff1a\u6700\u540e\u4e00\u4e2a\u5730\u5740 0x0038 + 9 = 0x0041 > 0x003F\uff0c\u76f4\u63a5\u6254 0x02\u3002\u5f88\u591a\u4ece\u7ad9\u5728\u505a\u5730\u5740\u5408\u6cd5\u6027\u68c0\u67e5\u65f6\uff0c\u4f1a\u5148\u7b97\u8d77\u59cb + \u6570\u91cf\u662f\u5426\u5728\u8303\u56f4\u5185\uff0c\u53ea\u8981\u4efb\u4f55\u4e00\u4e2a\u5730\u5740\u8d8a\u754c\u5c31\u6574\u5305\u62d2\u7edd\u3002\u4e0d\u662f\u4e00\u4e2a\u5bc4\u5b58\u5668\u8d8a\u754c\u8fd4\u56de\u90e8\u5206\u6570\u636e\u2014\u2014Modbus \u6807\u51c6\u6ca1\u6709\u90e8\u5206\u54cd\u5e94\u7684\u6982\u5ff5\u3002\n\n### \u6848\u4f8b 4\uff1a\u79bb\u6563\u8f93\u5165\u548c\u7ebf\u5708\u5730\u5740\u6df7\u6dc6\n\n\u8fd9\u4e2a\u5751\u5728\u7528\u4e86 Modicon \u8001\u5f0f 5 \u4f4d\u5730\u5740\u6807\u6ce8\u7684\u516c\u53f8\u91cc\u7279\u522b\u5e38\u89c1\u30021xxxx \u662f\u79bb\u6563\u8f93\u5165\uff08\u53ea\u8bfb\u4f4d\uff09\uff0c0xxxx \u662f\u7ebf\u5708\uff08\u8bfb\u5199\u4f4d\uff09\u3002\u4e0a\u4f4d\u673a\u7ec4\u6001\u91cc\u914d\u7f6e\u4e86\u5730\u5740 10001 \u6765\u8bfb\u8bbe\u5907\u72b6\u6001\uff0c\u4f46\u5b9e\u9645\u8be5\u4ece\u7ad9\u628a\u8bbe\u5907\u72b6\u6001\u653e\u5728\u4e86\u7ebf\u5708\u533a\uff080xxxx \u5bf9\u5e94 0x01 \u529f\u80fd\u7801\uff09\u3002\u4e0a\u4f4d\u673a\u7528 0x02\uff08\u8bfb\u79bb\u6563\u8f93\u5165\uff09\u53bb\u8bf7\u6c42\u5730\u5740 0x0000\uff0c\u4ece\u7ad9\u91cc 0x0000 \u5728\u79bb\u6563\u8f93\u5165\u533a\u786e\u5b9e\u4e0d\u5b58\u5728\u2014\u2014\u79bb\u6563\u8f93\u5165\u603b\u5171\u6709 8 \u8def\uff08\u5730\u5740 0x0000~0x0007\uff09\u4f46\u90a3 8 \u8def\u5df2\u7ecf\u5206\u914d\u7ed9\u4e86\u5176\u4ed6 DI\u3002\u4ece\u7ad9\u8fd4\u56de 0x02\u3002\u6362\u4e2a\u529f\u80fd\u7801\u6216\u8005\u6362\u4e2a\u5730\u5740\u90fd\u80fd\u89e3\u51b3\uff0c\u4f46\u524d\u63d0\u662f\u4f60\u5f97\u77e5\u9053\u4ece\u7ad9\u7684\u5730\u5740\u6620\u5c04\u8868\u957f\u4ec0\u4e48\u6837\u3002\u4e0d\u5c11\u5de5\u63a7\u5de5\u7a0b\u5e08\u76f4\u63a5\u628a\u6240\u6709\u79bb\u6563\u4fe1\u53f7\u5168\u6620\u5c04\u5230\u7ebf\u5708\u533a\u6216\u5168\u6620\u5c04\u5230\u4fdd\u6301\u5bc4\u5b58\u5668\u91cc\uff0c\u7701\u5f97\u7528\u6237\u641e\u6df7\u2014\u2014\u4f46\u524d\u63d0\u662f\u4f60\u624b\u91cc\u7684\u4ece\u7ad9\u5141\u8bb8\u4f60\u8fd9\u4e48\u505a\u3002\n\n## 0x03 \u2014 \u975e\u6cd5\u6570\u636e\u503c\n\n\u5730\u5740\u6709\u6548\u3001\u529f\u80fd\u7801\u6709\u6548\uff0c\u4f46\u8bf7\u6c42\u4f53\u4e2d\u643a\u5e26\u7684\u6570\u636e\u503c\u4e0d\u5728\u5141\u8bb8\u8303\u56f4\u5185\u3002\n\n\u8fd9\u662f\u4e00\u4e2a\u5bb9\u6613\u88ab\u5ffd\u7565\u7684\u5f02\u5e38\u7801\u3002\u5f88\u591a\u65f6\u5019\u4f60\u4f1a\u5148\u6000\u7591\u5730\u5740\u914d\u7f6e\u9519\u4e86\uff0c\u4f46\u5b9e\u9645\u662f\u5199\u7684\u503c\u8d8a\u754c\u4e86\u3002\n\n### \u62a5\u6587\u793a\u4f8b\n\n```\n\u8bf7\u6c42:     01 06 00 10 FF FF  \u2014 \u5199\u5355\u4e2a\u5bc4\u5b58\u5668\uff0c\u5730\u5740 0x0010\uff0c\u503c 0xFFFF\n\u5f02\u5e38\u54cd\u5e94:  01 86 03            \u2014 \u529f\u80fd\u7801 0x06|0x80 = 0x86\uff0c\u5f02\u5e38\u7801 0x03\n```\n\n\u4e3a\u4ec0\u4e48 0xFFFF\uff0865535\uff09\u975e\u6cd5\uff1f\u56e0\u4e3a\u90a3\u4e2a\u5bc4\u5b58\u5668\u662f 0~10000 \u7684\u5de5\u7a0b\u503c\u8303\u56f4\u300265535 \u5728 16 \u4f4d\u8868\u793a\u4e0a\u662f\u5408\u6cd5\u7684\uff0c\u4f46\u5728\u4e1a\u52a1\u903b\u8f91\u4e0a\u4e0d\u5408\u6cd5\u3002\n\n### \u6848\u4f8b 1\uff1a\u5199 EEPROM \u53c2\u6570\u8d85\u51fa\u914d\u7f6e\u8303\u56f4\n\n\u6b27\u59c6\u9f99 E5CC \u6e29\u63a7\u5668\uff0c\u5bc4\u5b58\u5668 0x0103\uff08PID \u6bd4\u4f8b\u5e26\uff09\u3002\u8be5\u53c2\u6570\u7684\u6709\u6548\u8303\u56f4\u662f 0.1~999.9\uff0c\u4ee5 0.1\u00b0C \u4e3a\u5355\u4f4d\u5b58\u50a8\uff0c\u5373\u5bc4\u5b58\u5668\u503c 1~9999\u3002\u4e0a\u4f4d\u673a\u4e0b\u53d1 0x0000\uff08\u5373 0.0\u00b0C\uff09\uff0c\u4ece\u7ad9\u6821\u9a8c\u540e\u53d1\u73b0\u503c\u5c0f\u4e8e\u4e0b\u9650 1\uff0c\u8fd4\u56de 0x03\u3002\u624b\u518c\u4e0a\u5199\u4e86\u8303\u56f4\uff0c\u4f46\u4e0a\u4f4d\u673a\u4ee3\u7801\u91cc\u5077\u61d2\u6ca1\u505a\u8fb9\u754c\u68c0\u67e5\u3002\u8c03\u4e86\u534a\u5c0f\u65f6\u624d\u53d1\u73b0\u662f\u5199\u503c\u8d85\u8303\u56f4\u2014\u2014\u8fd9\u79cd\u4f4e\u7ea7\u9519\u8bef\u6bcf\u4e2a\u4eba\u90fd\u4f1a\u72af\uff0c\u91cd\u8981\u7684\u662f\u8bb0\u4f4f\u5148\u7ffb\u624b\u518c\u518d\u770b\u5f02\u5e38\u7801\u3002\n\n### \u6848\u4f8b 2\uff1a\u5bf9\u53ea\u8bfb\u5bc4\u5b58\u5668\u6267\u884c\u5199\u64cd\u4f5c\n\nABB ACS580 \u53d8\u9891\u5668\uff0c\u5bc4\u5b58\u5668 0x2104\uff08\u5b9e\u9645\u8f6c\u901f\u53cd\u9988\uff0c\u53ea\u8bfb\uff09\u3002\u4e0a\u4f4d\u673a\u8bd5\u56fe\u7528 0x06 \u5199\u5165 1500\uff08\u60f3\u624b\u52a8\u7ed9\u8f6c\u901f\u503c\uff09\uff0c\u4ece\u7ad9\u8fd4\u56de 0x03\u30020x2104 \u8fd9\u4e2a\u5730\u5740\u672c\u8eab\u5b58\u5728\uff0c\u529f\u80fd\u7801 0x06 \u4e5f\u88ab\u652f\u6301\uff0c\u4f46\u8be5\u5730\u5740\u5728\u4ece\u7ad9\u5185\u90e8\u88ab\u6807\u8bb0\u4e3a\u53ea\u8bfb\u5c5e\u6027\u3002\u300c\u975e\u6cd5\u6570\u636e\u503c\u300d\u5728\u8fd9\u91cc\u7684\u542b\u4e49\u662f\u300c\u4f60\u5f80\u4e00\u4e2a\u4e0d\u63a5\u53d7\u5199\u5165\u7684\u5730\u5740\u5199\u4e86\u6570\u636e\u300d\u2014\u2014\u4e0d\u662f\u503c\u672c\u8eab\u975e\u6cd5\uff0c\u662f\u5199\u8fd9\u4e2a\u52a8\u4f5c\u975e\u6cd5\u3002Modbus \u534f\u8bae\u89c4\u8303\u91cc\uff0c0x03 \u7684\u63aa\u8f9e\u662f\u300cValue is not allowed\u300d\uff0c\u7ed9\u4e86\u4ece\u7ad9\u5b9e\u73b0\u81ea\u7531\u5ea6\u3002\u8bb8\u591a\u5382\u5546\u5c31\u628a\u53ea\u8bfb\u4fdd\u62a4\u5f52\u5230 0x03 \u4e0b\u3002\n\n### \u6848\u4f8b 3\uff1a\u591a\u5bc4\u5b58\u5668\u5199 \u2014\u2014 \u90e8\u5206\u5b57\u6bb5\u503c\u975e\u6cd5\n\n\u7528 0x10 \u6279\u91cf\u5199 5 \u4e2a\u5bc4\u5b58\u5668\uff0c\u524d 4 \u4e2a\u503c\u6ca1\u6bdb\u75c5\uff0c\u7b2c 5 \u4e2a\u5bc4\u5b58\u5668\u8981\u6c42\u503c\u5728 0~100\uff0c\u4f60\u5199\u4e86 200\u3002\u6709\u4e9b\u4ece\u7ad9\u4f1a\u6821\u9a8c\u5168\u90e8\u6570\u636e\u540e\u624d\u56de\u590d\uff0c5 \u4e2a\u5168\u5408\u6cd5\u5c31\u6267\u884c\uff0c\u4efb\u4f55\u4e00\u4e2a\u4e0d\u5408\u6cd5\u5c31\u6574\u4f53\u62d2\u7edd\u8fd4\u56de 0x03\u3002\u6709\u4e9b\u4ece\u7ad9\u5219\u9010\u4e2a\u6821\u9a8c\u3001\u53d1\u73b0\u7b2c\u4e00\u4e2a\u4e0d\u5408\u6cd5\u5c31\u62d2\u7edd\u3002\u89c4\u8303\u6ca1\u8bf4\u5fc5\u987b\u6309\u54ea\u79cd\u65b9\u5f0f\uff0c\u5404\u5bb6\u7684\u5b9e\u73b0\u4e0d\u4e00\u6837\u3002\u5efa\u8bae\u4f60\u5bf9\u81ea\u5df1\u7528\u7684\u8bbe\u5907\u505a\u4e00\u4e0b\u8fb9\u754c\u6d4b\u8bd5\uff0c\u5fc3\u91cc\u6709\u6570\u3002\n\n### \u6848\u4f8b 4\uff1aModbus \u7535\u8868\u7684\u9700\u91cf\u590d\u4f4d\u5bc4\u5b58\u5668\u6743\u9650\u63a7\u5236\n\n\u65bd\u8010\u5fb7 PM800 \u7cfb\u5217\u7535\u529b\u4eea\u8868\uff0c\u5bc4\u5b58\u5668 0x2F01\uff08\u9700\u91cf\u590d\u4f4d\u547d\u4ee4\uff09\u53ea\u80fd\u5199\u5165\u7279\u5b9a\u7684\u63a7\u5236\u5b57\u7ec4\u5408\uff080x1234 \u6216 0x5678\uff09\u3002\u4e0a\u4f4d\u673a\u8bef\u5199\u4e86 0x0001 \u8bd5\u56fe\u6e05\u9700\u91cf\uff0c\u4eea\u8868\u8fd4\u56de 0x03\u3002\u624b\u518c\u4e0a\u660e\u786e\u5199\u4e86\uff1a\u590d\u4f4d\u547d\u4ee4\u5bc4\u5b58\u5668\u7684\u6709\u6548\u503c\u662f 0x1234 \u548c 0x5678\uff0c\u5176\u4ed6\u4efb\u4f55\u503c\u90fd\u89e6\u53d1 0x03\u3002\u8fd9\u4e2a\u8bbe\u8ba1\u662f\u4e3a\u4e86\u9632\u6b62\u8bef\u64cd\u4f5c\u2014\u2014\u6bd5\u7adf\u67d0\u4e9b\u5bc4\u5b58\u5668\u5199\u9519\u4e86\u4e0d\u662f\u62a5\u9519\u90a3\u4e48\u7b80\u5355\uff0c\u662f\u771f\u7684\u4f1a\u6539\u53c2\u6570\u3002\n\n\u8fd8\u6709\u4e00\u4e2a\u4e0e 0x03 \u76f8\u5173\u7684\u9677\u9631\uff1a\u529f\u80fd\u7801 0x06 \u5199\u5355\u4e2a\u5bc4\u5b58\u5668\u65f6\uff0c\u5982\u679c\u8be5\u5bc4\u5b58\u5668\u662f 32 \u4f4d\u503c\u7684\u4f4e 16 \u4f4d\uff0c\u53ea\u5199\u4f4e 16 \u4f4d\u800c\u9ad8 16 \u4f4d\u672a\u521d\u59cb\u5316\uff0c\u4ece\u7ad9\u53ef\u80fd\u8fd4\u56de 0x03\u3002\u6bd4\u5982 AB ACS580 \u7684\u53c2\u6570 0x1000\uff0832 \u4f4d\u6d6e\u70b9\uff09\uff0c\u4f60\u5fc5\u987b\u7528 0x10 \u4e00\u6b21\u5199 2 \u4e2a\u5bc4\u5b58\u5668\uff0c\u4e0d\u80fd\u62c6\u6210\u4e24\u4e2a 0x06\u3002\u5206\u5f00\u5199\u7684\u8bdd\u4ece\u7ad9\u4f1a\u5728\u7b2c\u4e00\u4e2a 0x06 \u65f6\u5c31\u62a5 0x03\u2014\u2014\u56e0\u4e3a\u5b83\u77e5\u9053\u8fd9\u4e2a\u5730\u5740\u662f 32 \u4f4d\u5bf9\u9f50\u7684\uff0c\u4e0d\u63a5\u53d7 16 \u4f4d\u5199\u64cd\u4f5c\u3002\n\n## 0x04 \u2014 \u4ece\u7ad9\u8bbe\u5907\u6545\u969c\n\n\u4ece\u7ad9\u5728\u5904\u7406\u8bf7\u6c42\u7684\u8fc7\u7a0b\u4e2d\u53d1\u751f\u4e86\u4e0d\u53ef\u6062\u590d\u7684\u5185\u90e8\u9519\u8bef\uff0c\u5bfc\u81f4\u547d\u4ee4\u65e0\u6cd5\u6267\u884c\u3002\u8fd9\u4e2a\u5f02\u5e38\u7801\u544a\u8bc9\u4f60\u300c\u4e0d\u662f\u4f60\u7684\u8bf7\u6c42\u6709\u95ee\u9898\uff0c\u662f\u6211\u81ea\u5df1\u574f\u4e86\u300d\u3002\n\n0x04 \u662f\u73b0\u573a\u6700\u8ba9\u4eba\u7d27\u5f20\u7684\u5f02\u5e38\u7801\u30020x01~0x03 \u4f60\u6539\u6539\u914d\u7f6e\u5c31\u80fd\u89e3\u51b3\uff0c0x04 \u610f\u5473\u7740\u53ef\u80fd\u8981\u53bb\u8f66\u95f4\u91cc\u722c\u68af\u5b50\u4e86\u3002\n\n### \u62a5\u6587\u793a\u4f8b\n\n```\n\u8bf7\u6c42:     03 03 00 20 00 04  \u2014 \u8bfb 4 \u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\n\u5f02\u5e38\u54cd\u5e94:  03 83 04\n```\n\n\u540c\u4e00\u4e2a\u8bf7\u6c42\uff0c\u5341\u5206\u949f\u524d\u8fd8\u6b63\u5e38\u8fd4\u56de\u6570\u636e\uff0c\u73b0\u5728\u5f00\u59cb\u6301\u7eed\u8fd4\u56de 0x04\u3002\u786c\u4ef6\u6545\u969c\u7684\u53ef\u80fd\u6027\u5927\u4e86\u3002\n\n### \u6848\u4f8b 1\uff1aModbus \u4f20\u611f\u5668 EEPROM \u5199\u5165\u5931\u8d25\n\n\u4e00\u53f0\u6606\u4ed1\u6d77\u5cb8 JWSK-6 \u6e29\u6e7f\u5ea6\u53d8\u9001\u5668\uff0cModbus RTU \u63a5\u53e3\u3002\u8fdc\u7a0b\u6539\u4e86\u8bbe\u5907\u5730\u5740\u4ece 0x01 \u5230 0x05\uff0c\u5199 EEPROM \u7684\u8fc7\u7a0b\u4e2d\u4f9b\u7535\u6296\u52a8\u4e86\u4e00\u4e0b\u3002\u5199\u5165\u5931\u8d25\uff0c\u8bbe\u5907\u56fa\u4ef6\u68c0\u6d4b\u5230 EEPROM checksum \u4e0d\u5339\u914d\uff0c\u8fdb\u5165\u4e86 fail-safe \u6a21\u5f0f\u3002\u4e4b\u540e\u6240\u6709\u529f\u80fd\u7801\u8bf7\u6c42\uff08\u4e0d\u7ba1 0x03 \u8bfb\u8fd8\u662f 0x06 \u5199\uff09\u5168\u90e8\u8fd4\u56de 0x04\u3002\u67e5\u4e86\u624b\u518c\u786e\u8ba4\uff1a\u8be5\u4f20\u611f\u5668\u5728 EEPROM \u81ea\u68c0\u5931\u8d25\u540e\u4f1a\u9501\u6b7b\u901a\u4fe1\uff0c\u53ea\u80fd\u7269\u7406\u65ad\u7535\u91cd\u542f\u6062\u590d\u51fa\u5382\u8bbe\u7f6e\u3002\u8fd9\u5c5e\u4e8e\u56fa\u4ef6\u4fdd\u62a4\u673a\u5236\u2014\u2014\u6bd4\u8ba9\u4f60\u8bfb\u5230\u9519\u8bef\u503c\u5f3a\u3002\n\n### \u6848\u4f8b 2\uff1a\u6e29\u63a7\u5668\u63a2\u5934\u77ed\u8def\u5bfc\u81f4 AD \u8f6c\u6362\u5f02\u5e38\n\nRKC CB100 \u6e29\u63a7\u5668\uff0c\u70ed\u7535\u5076\u8f93\u5165\u7aef\u56e0\u4e3a\u63a5\u7ebf\u7aef\u5b50\u8fdb\u6c34\u77ed\u8def\u4e86\u3002AD \u8f6c\u6362\u82af\u7247\u8bfb\u5230\u7684\u662f\u6ea2\u51fa\u503c\uff0c\u56fa\u4ef6\u5224\u5b9a\u4f20\u611f\u5668\u6545\u969c\uff0c\u7136\u540e\u6240\u6709 0x03 \u8bfb PV \u503c\u7684\u8bf7\u6c42\u90fd\u8fd4\u56de 0x04\u3002\u8fd9\u4e2a 0x04 \u4e0d\u662f Modbus \u901a\u4fe1\u82af\u7247\u574f\uff0c\u662f\u4f20\u611f\u5668\u524d\u7aef\u6545\u969c\u901a\u8fc7\u56fa\u4ef6\u7684\u5f02\u5e38\u4f20\u9012\u673a\u5236\u53cd\u6620\u5230\u4e86\u534f\u8bae\u5c42\u3002\u6362\u4e86\u4e2a\u70ed\u7535\u5076\u3001\u64e6\u5e72\u7aef\u5b50\uff0c0x04 \u6d88\u5931\u4e86\u3002\n\n### \u6848\u4f8b 3\uff1a\u6269\u5c55 I\/O \u6a21\u5757\u6389\u7ebf\n\nSiemens ET200SP \u901a\u8fc7\u63a5\u53e3\u6a21\u5757\u505a Modbus TCP Server\u3002\u4e00\u4e2a DI \u6a21\u5757\u56e0\u4e3a\u80cc\u677f\u8fde\u63a5\u5668\u63a5\u89e6\u4e0d\u826f\u6389\u7ebf\u4e86\u3002\u5bf9\u4e8e\u6389\u7ebf\u6a21\u5757\u7684\u5bc4\u5b58\u5668\u5730\u5740\uff0c\u4ece\u7ad9\u7edf\u4e00\u8fd4\u56de 0x04\u3002\u4f46\u5176\u4ed6\u6b63\u5e38\u6a21\u5757\u7684\u5bc4\u5b58\u5668\u5730\u5740\u8bfb\u53d6\u6b63\u5e38\u3002\u8fd9\u8bf4\u660e\u4ece\u7ad9\u5185\u90e8\u7684\u6545\u969c\u9694\u79bb\u505a\u5f97\u597d\u2014\u2014\u574f\u4e00\u5757\u4e0d\u5f71\u54cd\u5168\u5c40\u3002\n\n### \u6848\u4f8b 4\uff1a\u6a21\u62df\u91cf\u8f93\u5165\u6a21\u5757\u8fc7\u538b\u4fdd\u62a4\u89e6\u53d1\n\n\u7814\u534e ADAM-4117 \u6a21\u62df\u91cf\u8f93\u5165\u6a21\u5757\uff0c\u91cf\u7a0b\u8bbe\u7f6e 0~5V\u3002\u67d0\u4e2a\u901a\u9053\u610f\u5916\u63a5\u5165\u4e86 12V \u4fe1\u53f7\uff0c\u6a21\u5757\u5185\u8fc7\u538b\u4fdd\u62a4\u7535\u8def\u542f\u52a8\uff0c\u8be5\u901a\u9053\u8fdb\u5165\u6545\u969c\u72b6\u6001\u3002\u6240\u6709 0x04 \u8bfb\u8be5\u901a\u9053\u503c\u7684\u8bf7\u6c42\u8fd4\u56de 0x04\uff0c\u914d\u7f6e\u6587\u4ef6\u663e\u793a\u9519\u8bef\u6807\u5fd7\u4f4d\u7f6e\u4f4d\u3002\u62d4\u6389\u8fc7\u538b\u4fe1\u53f7\u3001\u91cd\u65b0\u4e0a\u7535\u540e\u6062\u590d\u3002\u8fd9\u4e2a 0x04 \u7684\u6839\u56e0\u5728\u7269\u7406\u63a5\u7ebf\uff0c\u4e0d\u5728\u901a\u4fe1\u534f\u8bae\u3002\u6392\u67e5\u65f6\u5148\u628a\u7ebf\u7529\u4e86\uff0c\u518d\u7528\u4eff\u771f\u4fe1\u53f7\u6d4b\u2014\u2014\u4e0d\u8fc7\u6211\u8bb0\u5f97 ADAM-4117 \u6709\u65f6\u8981\u8f6f\u590d\u4f4d\uff0c\u5355\u9760\u91cd\u65b0\u4e0a\u7535\u4e0d\u591f\u3002\n\n## 0x05 \u2014 \u786e\u8ba4\uff08ACK\uff09\n\n0x05 \u4e0d\u662f\u9519\u8bef\u3002\u5b83\u662f\u4ece\u7ad9\u5bf9\u4e3b\u7ad9\u8bf4\uff1a\u300c\u6536\u5230\u4e86\uff0c\u6b63\u5728\u505a\uff0c\u4f60\u5148\u522b\u50ac\u3002\u300d\n\n\u6807\u51c6\u63aa\u8f9e\u662f\u300cAcknowledge\u300d\u3002\u4ece\u7ad9\u5df2\u7ecf\u63a5\u53d7\u4e86\u8bf7\u6c42\uff0c\u4f46\u5904\u7406\u9700\u8981\u8f83\u957f\u65f6\u95f4\uff08\u6bd4\u5982\u5199 Flash\u3001\u6267\u884c\u81ea\u6574\u5b9a\uff09\uff0c\u5148\u56de\u4e00\u4e2a 0x05 \u8ba9\u4e3b\u7ad9\u77e5\u9053\u8fde\u63a5\u6ca1\u65ad\uff0c\u540e\u7eed\u5904\u7406\u5b8c\u6210\u540e\u518d\u901a\u8fc7\u6b63\u5e38\u54cd\u5e94\u6216\u72b6\u6001\u4f4d\u544a\u77e5\u7ed3\u679c\u3002\n\n\u8fd9\u662f 7 \u4e2a\u6807\u51c6\u5f02\u5e38\u7801\u91cc\u6700\u7279\u6b8a\u7684\u4e00\u4e2a\u2014\u2014\u5b83\u662f\u552f\u4e00\u4e0d\u8868\u793a\u95ee\u9898\u7684\u5f02\u5e38\u7801\u3002\n\n### \u62a5\u6587\u793a\u4f8b\n\n```\n\u8bf7\u6c42:     01 06 0F A0 00 00  \u2014 \u5199\u5bc4\u5b58\u5668 0x0FA0 = 0x0000\uff0c\u89e6\u53d1\u53c2\u6570\u4fdd\u5b58\n\u5f02\u5e38\u54cd\u5e94:  01 86 05\n```\n\n### \u6848\u4f8b 1\uff1a\u53d8\u9891\u5668\u53c2\u6570\u5199\u5165 EEPROM\n\n\u53f0\u8fbe VFD-M \u53d8\u9891\u5668\uff0c\u5199 0x2000\uff08\u547d\u4ee4\u5bc4\u5b58\u5668\uff09= 0x0010 \u89e6\u53d1\u300c\u53c2\u6570\u5199\u5165 EEPROM\u300d\u64cd\u4f5c\u3002EEPROM \u64e6\u5199\u5468\u671f\u5728 10~30ms \u5de6\u53f3\u3002\u4ece\u7ad9\u6536\u5230\u547d\u4ee4\u540e\u5148\u56de 0x86 + 0x05\uff0c\u8868\u793a\u300c\u77e5\u9053\u4f60\u8981\u4fdd\u5b58\u53c2\u6570\uff0c\u6b63\u5728\u5199 Flash\u300d\u3002\u5927\u7ea6 20ms \u540e\u53ef\u4ee5\u518d\u6b21\u8f6e\u8be2\u547d\u4ee4\u5bc4\u5b58\u5668\uff0c\u8bfb\u5230 0x0000 \u8868\u793a\u5199\u5165\u5b8c\u6210\u3002\u5982\u679c\u5728 0x05 \u4e4b\u540e 50ms \u5185\u6ca1\u6709\u5b8c\u6210\uff0c\u6709\u4e9b\u53d8\u9891\u5668\u4f1a\u8d85\u65f6\u56de\u9000\u3002\n\n### \u6848\u4f8b 2\uff1a\u6e29\u5ea6\u63a7\u5236\u5668 PID \u81ea\u6574\u5b9a\n\n\u6b27\u59c6\u9f99 E5CC\uff0c\u5199 0x0101\uff08AT \u6267\u884c\/\u505c\u6b62\uff09= 0x0001 \u542f\u52a8\u81ea\u6574\u5b9a\u3002\u8fd9\u4e2a\u64cd\u4f5c\u9700\u8981\u51e0\u5206\u949f\u3002E5CC \u5148\u56de 0x05\uff0c\u7136\u540e\u81ea\u6574\u5b9a\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u6b63\u5e38\u8bfb\u53d6 PV \u548c SV \u503c\uff0c\u53ea\u662f AT \u6807\u5fd7\u4f4d\u4e3a ON\u3002\u81ea\u6574\u5b9a\u5b8c\u6210\u540e\uff0cAT \u81ea\u52a8 OFF\u3002\u4e0a\u4f4d\u673a\u9700\u8981\u5728\u6536\u5230 0x05 \u540e\u542f\u52a8\u8d85\u65f6\u8ba1\u65f6\u5668\uff0c\u4e0d\u8981\u4e00\u76f4\u5728\u90a3\u6b7b\u7b49\u2014\u2014\u6709\u4e9b\u8bbe\u5907\u7684\u81ea\u6574\u5b9a\u80fd\u8dd1 30 \u5206\u949f\u3002\n\n### \u6848\u4f8b 3\uff1a\u7f51\u5173\u540e\u7aef\u7684\u4ece\u7ad9\u54cd\u5e94\u6162\n\nModbus TCP \u8f6c RTU \u7f51\u5173\uff08\u6bd4\u5982 MOXA MGate MB3170\uff09\uff0c\u4e3b\u7ad9\u901a\u8fc7\u7f51\u5173\u8bfb\u4e00\u4e2a 9600bps \u4f4e\u901f\u603b\u7ebf\u4e0a\u7684\u4ece\u7ad9\u3002\u4e3b\u7ad9\u53d1\u4e86\u8bfb 125 \u4e2a\u5bc4\u5b58\u5668\u7684\u8bf7\u6c42\uff0c\u7f51\u5173\u628a\u8fd9\u4e2a\u8bf7\u6c42\u8f6c\u53d1\u5230 RTU \u603b\u7ebf\uff0c\u4f46\u56e0\u4e3a\u6570\u636e\u91cf\u5927\u3001\u6ce2\u7279\u7387\u4f4e\uff0cRTU \u4ece\u7ad9\u9700\u8981 200ms+ \u624d\u80fd\u56de\u5b8c\u6570\u636e\u3002\u7f51\u5173\u5728\u6536\u5230\u5b8c\u6574 RTU \u54cd\u5e94\u4e4b\u524d\uff0c\u5148\u7ed9 TCP \u4e3b\u7ad9\u56de\u4e00\u4e2a 0x05 \u5360\u4f4d\u2014\u2014\u8fd9\u5c31\u662f\u7f51\u5173\u5e38\u89c1\u7684\u300cpending\u300d\u5904\u7406\u65b9\u5f0f\u3002Modbus TCP \u89c4\u8303\u91cc\u5176\u5b9e\u6ca1\u6709\u660e\u786e\u89c4\u5b9a 0x05 \u5728\u8fd9\u79cd\u573a\u666f\u4e0b\u7684\u7528\u6cd5\uff0c\u4f46\u5f88\u591a\u7f51\u5173\u5382\u5546\u5c31\u8fd9\u4e48\u5e72\u4e86\u3002\n\n\u4e00\u4e2a\u9700\u8981\u6ce8\u610f\u7684\u8bbe\u8ba1\u7ec6\u8282\uff1a0x05 \u89e6\u53d1\u540e\uff0c\u4e3b\u7ad9\u4fa7\u7684\u7b49\u5f85\u7b56\u7565\u3002\u4e0d\u5e94\u7acb\u5373\u91cd\u53d1\u540c\u6837\u7684\u8bf7\u6c42\u2014\u2014\u8fd9\u4f1a\u8ba9\u4ece\u7ad9\u6536\u5230\u91cd\u590d\u547d\u4ee4\u3002\u6b63\u786e\u7684\u505a\u6cd5\u662f\uff1a\u8f6e\u8be2\u4e00\u4e2a\u72b6\u6001\u5bc4\u5b58\u5668\uff08\u5982\u679c\u4ece\u7ad9\u63d0\u4f9b\u4e86\uff09\u6216\u8005\u8bbe\u7acb\u8d85\u65f6\u8ba1\u65f6\u5668\uff0c\u8d85\u65f6\u540e\u53d1\u65b0\u7684\u67e5\u8be2\u547d\u4ee4\u3002\u6709\u4e9b SCADA \u9a71\u52a8\uff08\u6bd4\u5982 Kepware \u7684 Modbus \u9a71\u52a8\uff09\u5185\u7f6e\u4e86 0x05 \u7684\u5904\u7406\u903b\u8f91\uff0c\u6709\u4e9b\u5219\u76f4\u63a5\u62a5\u8d85\u65f6\u3002\u5982\u679c\u4f60\u81ea\u5df1\u5199 Modbus \u9a71\u52a8\uff0c0x05 \u7684\u5904\u7406\u903b\u8f91\u662f\u5fc5\u505a\u9879\u3002\n\n## 0x06 \u2014 \u4ece\u7ad9\u5fd9\n\n\u4ece\u7ad9\u73b0\u5728\u592a\u5fd9\u4e86\uff0c\u5904\u7406\u4e0d\u4e86\u4f60\u7684\u8bf7\u6c42\u3002\u547d\u4ee4\u88ab\u63a5\u53d7\u4e86\u4f46\u65e0\u6cd5\u6267\u884c\uff0c\u4e3b\u7ad9\u5e94\u8be5\u7a0d\u540e\u91cd\u8bd5\u3002\n\n0x05 \u548c 0x06 \u7684\u533a\u522b\uff1a0x05 \u662f\u300c\u6536\u5230\u4e86\uff0c\u5728\u5904\u7406\uff0c\u7b49\u7ed3\u679c\u300d\uff1b0x06 \u662f\u300c\u73b0\u5728\u6ca1\u7a7a\uff0c\u4f60\u8fc7\u4f1a\u513f\u518d\u6765\u300d\u30020x05 \u610f\u5473\u7740\u4ece\u7ad9\u5df2\u7ecf\u5f00\u59cb\u6267\u884c\u547d\u4ee4\u4e86\uff0c0x06 \u610f\u5473\u7740\u4ece\u7ad9\u6839\u672c\u6ca1\u5f00\u59cb\u6267\u884c\u3002\n\n### \u62a5\u6587\u793a\u4f8b\n\n```\n\u8bf7\u6c42:     01 06 20 00 07 D0  \u2014 \u5199\u5bc4\u5b58\u5668 0x2000 = 0x07D0(2000)\n\u5f02\u5e38\u54cd\u5e94:  01 86 06            \u2014 \u5fd9\uff0c\u6ca1\u7a7a\u5904\u7406\n```\n\n### \u6848\u4f8b 1\uff1a\u5199\u5b8c\u53c2\u6570\u7acb\u5373\u8bfb\n\n\u5199\u5165\u4e00\u4e2a\u9700\u8981\u5199 EEPROM \u7684\u53c2\u6570\u540e\uff0c10ms \u5185\u7acb\u5373\u53d1\u4e0b\u4e00\u4e2a\u8bf7\u6c42\u3002\u4ece\u7ad9 Flash \u63a7\u5236\u5668\u8fd8\u6ca1\u91ca\u653e\u603b\u7ebf\uff0c\u76f4\u63a5\u56de 0x06\u3002\u5f88\u591a\u5de5\u7a0b\u5e08\u5728\u8c03\u8bd5\u811a\u672c\u91cc\u51e0\u6beb\u79d2\u4e00\u4e2a\u8bf7\u6c42\u8fde\u7eed\u53d1\uff0c\u4ece\u7ad9\u6839\u672c\u6765\u4e0d\u53ca\u5904\u7406\u3002\u4e0d\u662f\u8bbe\u5907\u6162\uff0c\u662f\u4f60\u592a\u5feb\u4e86\u3002Modbus \u6ca1\u6709\u6d41\u63a7\u673a\u5236\uff0c\u4e3b\u7ad9\u9700\u8981\u81ea\u5df1\u63a7\u5236\u8282\u594f\u2014\u2014\u5199\u5b8c Flash \u76f8\u5173\u5bc4\u5b58\u5668\u540e\uff0c\u7559 30~50ms \u518d\u53d1\u4e0b\u4e00\u4e2a\u8bfb\u5199\u8bf7\u6c42\u3002\n\n### \u6848\u4f8b 2\uff1a\u9ad8\u901f\u8f6e\u8be2\u5bfc\u81f4\u4f4e\u901f\u8bbe\u5907\u7f13\u51b2\u533a\u6ea2\u51fa\n\n\u7528 Modbus Poll \u4ee5 20ms \u95f4\u9694\u8f6e\u8be2\u4e00\u53f0 9600bps \u7684 RTU \u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u3002\u521a\u542f\u52a8\u65f6\u6b63\u5e38\uff0c\u8fd0\u884c\u4e00\u5206\u949f\u540e\u5f00\u59cb\u95f4\u6b47\u6027\u51fa\u73b0 0x06\u30029600bps \u4f20\u8f93\u4e00\u4e2a\u5b57\u8282\u7ea6 1ms\uff0c\u4e00\u4e2a\u6700\u5c0f\u8bfb\u8bf7\u6c42+\u54cd\u5e94\u6765\u56de\u5927\u6982 30~40ms\u300220ms \u7684\u8f6e\u8be2\u95f4\u9694\u5df2\u7ecf\u5c0f\u4e8e\u8bbe\u5907\u7684\u6700\u5c0f\u54cd\u5e94\u5468\u671f\u3002\u4ece\u7ad9\u4e32\u53e3\u63a5\u6536\u7f13\u51b2\u533a\u88ab\u585e\u6ee1\u4e86\uff0c\u5b83\u5728\u5fd9\u7740\u4e22\u5f03\u6ea2\u51fa\u7684\u5e27\uff0c\u6ca1\u7cbe\u529b\u5904\u7406\u65b0\u8bf7\u6c42\u3002\u628a\u8f6e\u8be2\u95f4\u9694\u8c03\u5230 100ms \u5c31\u597d\u4e86\u3002\u6362\u6210 115200bps \u80fd\u8fdb\u4e00\u6b65\u7f29\u77ed\uff0c\u4f46\u5f88\u591a\u5de5\u63a7\u8bbe\u5907\u6700\u9ad8\u53ea\u652f\u6301\u5230 38400bps \u751a\u81f3 19200bps\u3002\n\n### \u6848\u4f8b 3\uff1a\u591a\u4e3b\u7ad9\u540c\u65f6\u8bbf\u95ee\u4e00\u4e2a\u4ece\u7ad9\n\n\u4e00\u4e2a RS-485 \u603b\u7ebf\u4e0a\u7684 Modbus RTU \u4ece\u7ad9\uff0c\u540c\u65f6\u63a5\u4e86 PLC \u548c\u4e0a\u4f4d\u673a SCADA \u4e24\u4e2a\u4e3b\u7ad9\u3002\u4e24\u4e2a\u4e3b\u7ad9\u4e4b\u95f4\u6ca1\u6709\u534f\u8c03\uff0c\u5404\u81ea\u4ee5 500ms \u548c 300ms \u95f4\u9694\u8f6e\u8be2\u3002\u78b0\u649e\u6982\u7387\u4e0a\u6765\u4e86\u2014\u2014\u4e24\u4e2a\u8bf7\u6c42\u5e27\u91cd\u53e0\uff0c\u4ece\u7ad9\u6536\u5230\u7684\u662f\u4e71\u7801\u3002\u6709\u4e9b\u4ece\u7ad9\u5728\u68c0\u6d4b\u5230\u5e27\u9519\u8bef\u540e\u4f1a\u5ffd\u7565\uff0c\u6709\u4e9b\u4ece\u7ad9\u4f1a\u6d88\u8017\u65f6\u95f4\u505a\u9519\u8bef\u5904\u7406\uff0c\u5bfc\u81f4\u521a\u6e05\u7a7a\u63a5\u6536\u7f13\u51b2\u533a\u65f6\u4e0b\u4e00\u4e2a\u4e3b\u7ad9\u7684\u5e27\u5c31\u5230\u4e86\u3002\u8fd8\u6ca1\u51c6\u5907\u597d\u63a5\u6536\u65b0\u5e27\uff0c\u53ea\u80fd\u56de 0x06\u3002RS-485 \u591a\u4e3b\u7ad9\u7684\u51b2\u7a81\u5904\u7406\uff0c\u5efa\u8bae\u4e0a\u786c\u4ef6\u6d41\u63a7\u6216\u5728\u4e3b\u7ad9\u4fa7\u505a\u4e92\u65a5\u9501\uff0c\u522b\u6307\u671b\u4ece\u7ad9\u81ea\u5df1\u641e\u5b9a\u3002\n\n### \u6848\u4f8b 4\uff1a\u4ece\u7ad9\u4e0a\u7535\u521d\u59cb\u5316\u671f\u95f4\u6536\u5230\u8bf7\u6c42\n\n\u5927\u90e8\u5206 Modbus \u4ece\u7ad9\u4e0a\u7535\u540e\u6709\u51e0\u5341\u6beb\u79d2\u5230\u51e0\u79d2\u7684\u521d\u59cb\u5316\u65f6\u95f4\u3002\u5728\u8fd9\u4e2a\u7a97\u53e3\u91cc\u53d1\u8bf7\u6c42\uff0c\u4ece\u7ad9\u7684 Modbus \u534f\u8bae\u6808\u8fd8\u6ca1\u51c6\u5907\u597d\u3002\u6709\u4e9b\u4ece\u7ad9\u76f4\u63a5\u4e0d\u56de\uff08No Response\uff09\uff0c\u6709\u4e9b\u4ece\u7ad9\u56de 0x06\u3002\u8fd9\u4e2a\u884c\u4e3a\u8ddf\u5177\u4f53\u7684\u56fa\u4ef6\u5b9e\u73b0\u6709\u5173\u3002\u4e39\u4f5b\u65af VLT FC302 \u53d8\u9891\u5668\u4e0a\u7535\u540e\u5927\u7ea6 2 \u79d2\u5185\u4f1a\u8fd4\u56de 0x06\uff0c\u521d\u59cb\u5316\u5b8c\u6210\u540e\u6062\u590d\u6b63\u5e38\u3002\u5982\u679c\u4f60\u7684 SCADA \u542f\u673a\u5c31\u53bb\u8bfb\u4ece\u7ad9\uff0c\u5934\u51e0\u4e2a\u8bf7\u6c42\u53ef\u80fd\u6536\u5230 0x06\u2014\u2014\u5728\u4e0a\u4f4d\u673a\u4ee3\u7801\u91cc\u52a0\u4e2a\u4e0a\u7535\u5ef6\u8fdf\u6216\u8005\u5bf9 0x06 \u505a\u81ea\u52a8\u91cd\u8bd5\uff08\u95f4\u9694 500ms\uff0c\u6700\u591a 3 \u6b21\uff09\u5c31\u80fd\u89c4\u907f\u3002\n\n0x06 \u548c 0x05 \u5f88\u5bb9\u6613\u641e\u6df7\uff0c\u8fd9\u91cc\u8bf4\u6e05\u695a\uff1a0x05 \u662f\u300c\u6b63\u5728\u5904\u7406\u4f60\u7684\u8bf7\u6c42\u300d\uff0c\u5904\u7406\u5b8c\u4e86\u4f1a\u56de\u6b63\u5e38\u6570\u636e\u30020x06 \u662f\u300c\u6ca1\u7a7a\u5904\u7406\u4f60\u7684\u8bf7\u6c42\uff0c\u8bf7\u6c42\u88ab\u4e22\u5f03\u4e86\u300d\u3002\u4e3b\u7ad9\u6536\u5230 0x05 \u5e94\u8be5\u7b49\u5f85\uff0c\u6536\u5230 0x06 \u5e94\u8be5\u91cd\u8bd5\u3002\u5982\u679c\u628a 0x06 \u5f53\u6210 0x05 \u5904\u7406\u2014\u2014\u7b49\u7740\u7b49\u7740\u5c31\u8d85\u65f6\u4e86\u3002\n\n## 0x0A \u2014 \u7f51\u5173\u8def\u5f84\u4e0d\u53ef\u7528\n\n\u8fd9\u4e2a\u5f02\u5e38\u7801\u53ea\u5728\u7f51\u5173\u573a\u666f\u51fa\u73b0\u3002\u7f51\u5173\u548c\u4e0b\u6e38\u4ece\u7ad9\u4e4b\u95f4\u7684\u901a\u4fe1\u51fa\u4e86\u95ee\u9898\u2014\u2014\u7f51\u5173\u672c\u8eab\u6ca1\u95ee\u9898\uff0c\u4f46\u5b83\u540e\u9762\u7684\u8bbe\u5907\u8fde\u4e0d\u4e0a\u4e86\u3002\n\nModbus \u6807\u51c6\u5b9a\u4e49\u7684\u63aa\u8f9e\u662f\u300cGateway Path Unavailable\u300d\u2014\u2014\u65e0\u6cd5\u5efa\u7acb\u5230\u76ee\u6807\u8bbe\u5907\u7684\u8def\u5f84\u3002\u8fd9\u91cc\u7684\u76ee\u6807\u8bbe\u5907\u4e0d\u662f\u5730\u5740 0x01 \u7684\u4ece\u7ad9\u672c\u4f53\uff0c\u800c\u662f\u7f51\u5173\u5185\u90e8\u7684\u300c\u8def\u7531\u300d\u5230\u4e0b\u6e38\u4ece\u7ad9\u7684\u8def\u5f84\u3002\n\n### \u62a5\u6587\u793a\u4f8b\n\n```\n\u8bf7\u6c42:     01 03 00 00 00 01  \u2014 \u901a\u8fc7\u7f51\u5173\u8bfb\u4e0b\u6e38\u4ece\u7ad9\n\u5f02\u5e38\u54cd\u5e94:  01 83 0A            \u2014 \u7f51\u5173\uff1a\u540e\u9762\u90a3\u4e2a\u4ece\u7ad9\u6ca1\u54cd\u5e94\n```\n\n### \u6848\u4f8b 1\uff1a\u4e32\u53e3\u670d\u52a1\u5668\u540e\u7aef\u7684\u4ece\u7ad9\u6389\u7ebf\n\nUSR-N510 \u4e32\u53e3\u670d\u52a1\u5668\u505a Modbus TCP \u8f6c RTU \u7f51\u5173\uff0c\u4e0b\u9762\u6302\u4e86 3 \u53f0 Modbus RTU \u4f20\u611f\u5668\uff08\u5730\u5740 0x01\u30010x02\u30010x03\uff09\u30020x02 \u4ece\u7ad9\u56e0\u4e3a\u7535\u6e90\u6a21\u5757\u70e7\u4e86\uff0c\u5b8c\u5168\u6389\u7ebf\u3002\u4e3b\u7ad9\u901a\u8fc7\u7f51\u5173\u8bfb 0x02 \u4ece\u7ad9\u65f6\uff0c\u4e32\u53e3\u670d\u52a1\u5668\u5c1d\u8bd5\u5728 RS-485 \u603b\u7ebf\u4e0a\u5e7f\u64ad\u8bf7\u6c42\uff0c\u7b49 500ms \u8d85\u65f6\u6ca1\u6536\u5230\u54cd\u5e94\uff0c\u7136\u540e\u5728 TCP \u4fa7\u7ed9\u4e3b\u7ad9\u56de\u4e86 0x0A\u30020x01 \u548c 0x03 \u4ece\u7ad9\u7684\u901a\u4fe1\u5b8c\u5168\u6b63\u5e38\u2014\u2014\u7f51\u5173\u672c\u8eab\u6d3b\u7740\uff0c\u53ea\u662f\u67d0\u4e00\u6761\u8def\u5f84\u65ad\u4e86\u3002\n\n### \u6848\u4f8b 2\uff1a\u7f51\u5173\u914d\u7f6e\u4e86\u9519\u8bef\u7684\u4e0b\u6e38\u53c2\u6570\n\nMOXA MGate MB3170\uff0c\u914d\u7f6e\u4e0b\u6e38\u4e3a 9600bps\u30018N1\u3002\u4f46\u5b9e\u9645 RS-485 \u603b\u7ebf\u4e0a\u7684\u8bbe\u5907\u662f 19200bps\u30018E1\uff08\u5076\u6821\u9a8c\uff09\u3002\u7f51\u5173\u6309\u7167 9600bps \u53d1\u8bf7\u6c42\u5e27\uff0c\u4ece\u7ad9\u6536\u5230\u7684\u662f\u4e71\u7801\uff0c\u4e0d\u54cd\u5e94\u3002\u7f51\u5173\u8d85\u65f6\u540e\u8fd4\u56de 0x0A\u3002\u8fd9\u79cd\u95ee\u9898\u5728\u6709\u591a\u5bb6\u7684\u8bbe\u5907\u6df7\u88c5\u7684 RS-485 \u603b\u7ebf\u4e0a\u5c24\u5176\u5e38\u89c1\u2014\u2014\u4e0d\u540c\u5382\u5546\u7684\u9ed8\u8ba4\u901a\u4fe1\u53c2\u6570\u4e0d\u4e00\u6837\uff0c\u9879\u76ee\u521d\u671f\u4e0d\u7edf\u4e00\u8c03\u4e00\u904d\u5c31\u4f1a\u8e29\u5751\u3002\n\n### \u6848\u4f8b 3\uff1aModbus TCP \u7ea7\u8054\u7f51\u5173\n\n\u4e00\u4e2a\u5927\u578b\u5206\u5e03\u5f0f\u573a\u666f\uff1a\u4e2d\u5fc3 SCADA \u2192 Modbus TCP \u4e3b\u7f51\u5173 \u2192 \u5149\u7ea4\u73af\u7f51 \u2192 \u5c31\u5730\u5b50\u7f51\u5173 \u2192 RS-485 \u4ece\u7ad9\u3002\u4e3b\u7f51\u5173\u5230\u5b50\u7f51\u5173\u4e4b\u95f4\u7684\u5149\u7ea4\u65ad\u4e86\uff0c\u4e3b\u7f51\u5173\u5bf9\u5b50\u7f51\u5173\u4e0b\u9762\u6240\u6709\u4ece\u7ad9\u7684\u8bf7\u6c42\u90fd\u8fd4\u56de 0x0A\u3002\u8fd9\u65f6\u5019\u6392\u67e5\u601d\u8def\u662f\u9010\u7ea7 ping\uff1a\u5148\u786e\u8ba4\u4e3b\u7f51\u5173\u5230\u5b50\u7f51\u5173\u7684 TCP \u8fde\u63a5\uff0c\u518d\u786e\u8ba4\u5b50\u7f51\u5173\u5230 RS-485 \u603b\u7ebf\uff0c\u6700\u540e\u624d\u662f\u4e32\u53e3\u8bbe\u5907\u672c\u8eab\u3002\n\n## \u5382\u5546\u81ea\u5b9a\u4e49\u5f02\u5e38\u7801\n\n\u9664 7 \u79cd\u6807\u51c6\u5f02\u5e38\u7801\uff0c\u5f88\u591a\u5382\u5546\u5728 0x80~0xFF \u533a\u6bb5\u5b9a\u4e49\u4e86\u79c1\u6709\u5f02\u5e38\u7801\u3002\u8fd9\u4e0d\u662f\u8fdd\u53cd\u6807\u51c6\u2014\u2014Modbus \u89c4\u8303\u5141\u8bb8\u5382\u5546\u6269\u5c55\u3002\u4f46\u4f60\u7684\u4e0a\u4f4d\u673a\u4ee3\u7801\u5982\u679c\u53ea\u8ba4\u8bc6 01~0A\uff0c\u78b0\u5230 0x90 \u5c31\u4f1a\u62a5\u300cUnknown Exception\u300d\u6216\u8005\u76f4\u63a5\u4e22\u5e27\u3002\n\n\u4e00\u4e9b\u5e38\u89c1\u5382\u5546\u6269\u5c55\uff1a\n\n\u5382\u5546\u81ea\u5b9a\u4e49\u5f02\u5e38\u7801\u542b\u4e49\u897f\u95e8\u5b50 S7-1200\/15000x80Modbus Server DB \u5757\u672a\u521d\u59cb\u5316\u6c47\u5ddd AM6000x81\u53c2\u6570\u9501\u5b9a\uff08\u9700\u8981\u5148\u5199\u89e3\u9501\u5bc4\u5b58\u5668\uff09\u53f0\u8fbe AS \u7cfb\u52170x8B\u529f\u80fd\u7801\u5728\u5f53\u524d PLC \u8fd0\u884c\u6a21\u5f0f\u4e0b\u88ab\u7981\u6b62\u90e8\u5206\u56fd\u4ea7\u6e29\u63a7\u56680x90~0x9F\u53c2\u6570\u6821\u9a8c\u5931\u8d25\uff08\u5199\u503c\u4e0e EEPROM \u4e0d\u7b26\uff09Schneider M2210xF0\u56fa\u4ef6\u4e0d\u652f\u6301\u7684\u5bc4\u5b58\u5668\u533a\u57df\n\n\u8fd9\u4e9b\u5f02\u5e38\u7801\u6ca1\u6709\u7edf\u4e00\u6807\u51c6\uff0c\u5f97\u7ffb\u5404\u5bb6\u624b\u518c\u3002\u6709\u4e9b\u5382\u5546\u5728\u624b\u518a\u7684 Modbus \u901a\u4fe1\u7ae0\u8282\u4f1a\u5217\u51fa\u5b8c\u6574\u7684\u5f02\u5e38\u7801\u8868\uff0c\u6709\u4e9b\u85cf\u5728\u9644\u5f55\u91cc\uff0c\u8fd8\u6709\u4e9b\u5e72\u8106\u4e0d\u5199\u2014\u2014\u4f60\u53ea\u80fd debug \u6293\u5230\u4e4b\u540e\u51ed\u7ecf\u9a8c\u5224\u65ad\u3002\n\n\u6709\u4e2a\u5751\uff1a\u90e8\u5206\u56fd\u4ea7 PLC \u5728\u9047\u5230 0x02 \u6761\u4ef6\u65f6\u4e5f\u4f1a\u56de 0x03\uff08\u4e0d\u533a\u5206\u975e\u6cd5\u5730\u5740\u548c\u975e\u6cd5\u6570\u636e\u503c\uff09\uff0c\u56e0\u4e3a\u5b83\u4eec\u5185\u90e8\u7684\u5f02\u5e38\u5904\u7406\u628a\u300c\u5730\u5740\u4e0d\u5b58\u5728\u300d\u548c\u300c\u503c\u4e0d\u5408\u6cd5\u300d\u5f52\u4e3a\u540c\u4e00\u4e2a\u9519\u8bef\u8def\u7531\u3002\u4f60\u6309\u6807\u51c6\u9884\u671f\u662f 0x02\uff0c\u5b9e\u9645\u6536\u5230 0x03\u2014\u2014\u522b\u8f83\u771f\uff0c\u5bf9\u7740\u624b\u518c\u7684\u5bc4\u5b58\u5668\u6620\u5c04\u8868\u67e5\u5c31\u662f\u4e86\u3002\n\n\u8fd8\u6709\u4e00\u4e2a\u5bb9\u6613\u88ab\u5ffd\u7565\u7684\uff1aCPU \u505c\u673a\u6a21\u5f0f\u4e0b\u7684\u5f02\u5e38\u7801\u884c\u4e3a\u3002\u5f88\u591a PLC \u5728 STOP \u72b6\u6001\u4e0b\u4ecd\u7136\u8fd0\u884c Modbus \u534f\u8bae\u6808\uff0c\u4f46\u884c\u4e3a\u4e0d\u540c\u3002\u897f\u95e8\u5b50 S7-1200 \u505a Modbus Server \u65f6\uff0cCPU \u4ece RUN \u5207\u6362\u5230 STOP\uff0c\u8bfb\u5230\u5df2\u6620\u5c04\u7684 DB \u5757\u8fd4\u56de 0x04\uff08\u300c\u8bbe\u5907\u6545\u969c\u300d\uff09\uff0c\u800c\u4e0d\u662f 0x01\u3002\u8fd9\u4e2a\u8bed\u4e49\u5f88\u5fae\u5999\u2014\u2014PLC \u6ca1\u574f\uff0c\u4f46\u5728 STOP \u6a21\u5f0f\u4e0b DB \u6570\u636e\u4e0d\u53ef\u7528\u3002\u65bd\u8010\u5fb7 M221 \u5728 STOP \u72b6\u6001\u4e0b\u5219\u4ecd\u7136\u54cd\u5e94 Modbus \u8bf7\u6c42\uff0c\u53ea\u662f\u6570\u636e\u4e0d\u66f4\u65b0\u3002\u4e09\u83f1 FX5U \u505a Modbus Server \u65f6\uff0cSTOP \u72b6\u6001\u4e0b\u76f4\u63a5\u4e0d\u54cd\u5e94\u4efb\u4f55\u8bf7\u6c42\uff0c\u4e0a\u4f4d\u673a\u770b\u5230\u7684\u662f\u8d85\u65f6\uff0c\u4e0d\u662f\u5f02\u5e38\u7801\u3002\u540c\u4e00\u5957 SCADA \u7cfb\u7edf\u8981\u9002\u914d\u4e0d\u540c\u54c1\u724c PLC \u7684 STOP \u884c\u4e3a\uff0c\u9a71\u52a8\u5c42\u9762\u5c31\u5f97\u505a\u5dee\u5f02\u5316\u5904\u7406\u3002\n\n\u5382\u5546\u6269\u5c55\u5f02\u5e38\u7801\u8fd8\u7ecf\u5e38\u88ab\u7528\u4e8e\u5b89\u5168\u573a\u666f\u3002\u6bd4\u5982\u67d0\u4e9b\u652f\u6301 Modbus Security\uff08\u57fa\u4e8e TLS\uff09\u7684\u7f51\u5173\u8bbe\u5907\uff0c\u4f1a\u5728\u8ba4\u8bc1\u5931\u8d25\u65f6\u8fd4\u56de\u81ea\u5b9a\u4e49\u5f02\u5e38\u7801 0xE0~0xEF \u8868\u793a\u5b89\u5168\u5c42\u62d2\u7edd\u3002\u8fd9\u4e0d\u662f Modbus \u6807\u51c6\u5b9a\u4e49\u7684\uff0c\u4f46\u786e\u5b9e\u5b58\u5728\u3002\u5982\u679c\u4f60\u7684 Modbus TCP \u901a\u4fe1\u7a81\u7136\u5f00\u59cb\u6536\u5230 0xE1\uff0c\u4e0d\u662f\u534f\u8bae\u6808\u89e3\u6790\u9519\u4e86\uff0c\u662f\u7f51\u5173\u5728\u544a\u8bc9\u4f60\u300cTLS \u63e1\u624b\u6ca1\u8fc7\u300d\u3002\n\n## \u7528 Wireshark \u6293\u5f02\u5e38\u5e27\n\n\u4e0d\u7ba1 RTU \u8fd8\u662f TCP\uff0cWireshark \u90fd\u80fd\u76f4\u63a5\u89e3\u6790 Modbus \u534f\u8bae\u3002\u524d\u63d0\u662f\u4f60\u7684\u6293\u5305\u70b9\u5728\u6b63\u786e\u7684\u7f51\u7edc\u4f4d\u7f6e\u3002\n\n### TCP \u573a\u666f\n\nModbus TCP \u8d70 502 \u7aef\u53e3\uff0cWireshark \u9ed8\u8ba4\u5c31\u89e3\u6790\u3002\u5728\u8fc7\u6ee4\u5668\u680f\u8f93\u5165 `modbus`\uff0c\u5f02\u5e38\u5e27\u4f1a\u663e\u793a\u4e3a\u7ea2\u8272\u80cc\u666f\u3002\n\n\u5c55\u5f00\u5f02\u5e38\u54cd\u5e94\u5e27\uff0c\u770b\u8fd9\u51e0\u4e2a\u5173\u952e\u5b57\u6bb5\uff1a\n\n```\nModbus\/TCP\n  Transaction Identifier: 1\n  Protocol Identifier: 0\n  Length: 3               \u2190 \u6ce8\u610f\u8fd9\u4e2a\u957f\u5ea6\n  Unit Identifier: 1\nModbus\n  Function Code: 131 (0x83)  \u2190 83 = 03 | 0x80\uff0cWireshark \u76f4\u63a5\u663e\u793a\u4e86\n  Exception Code: 2 (Illegal Data Address)\n```\n\n`Length: 3` \u662f MBAP \u5934\u91cc\u7684\u957f\u5ea6\u5b57\u6bb5\uff0c\u5b83 = Unit Identifier(1) + Function Code(1) + Exception Code(1) = 3 \u5b57\u8282\u3002\u6b63\u5e38\u54cd\u5e94\u8fd9\u4e2a\u503c\u4f1a\u66f4\u5927\uff08\u56e0\u4e3a\u540e\u9762\u6709\u6570\u636e\uff09\u3002\u53ea\u770b\u957f\u5ea6\u5c31\u80fd\u521d\u6b65\u5224\u65ad\u662f\u5f02\u5e38\u54cd\u5e94\u8fd8\u662f\u6b63\u5e38\u54cd\u5e94\u2014\u2014\u5f02\u5e38\u54cd\u5e94\u7684 TCP \u8f7d\u8377\u901a\u5e38\u53ea\u6709 3 \u5b57\u8282\u3002\n\n### RTU \u573a\u666f\n\nRTU \u6293\u5305\u9700\u8981\u7528 RS-485 \u8f6c USB \u8f6c\u6362\u5668\u642d\u4e00\u4e2a\u76d1\u542c\u8282\u70b9\u3002Wireshark \u5bf9 RTU \u7684\u652f\u6301\u4e0d\u5982 TCP \u597d\uff0c\u9700\u8981\u624b\u52a8\u6307\u5b9a\u7aef\u53e3\u914d\u7f6e\uff08\u6ce2\u7279\u7387\u3001\u6821\u9a8c\u7b49\uff09\u3002\u6293\u5230\u7684\u5f02\u5e38\u5e27\u683c\u5f0f\u548c TCP \u7c7b\u4f3c\uff0c\u4f46\u6ca1\u6709 MBAP \u5934\uff1a\n\n```\n`01 83 02 xx xx  \u2014 \u5730\u5740 01\uff0c\u529f\u80fd\u7801 83\uff0c\u5f02\u5e38\u7801 02\uff0cCRC xx xx`\n```\n\nRTU \u6293\u5305\u91cc\u6ca1\u6709 Transaction ID\uff0c\u4f60\u53ea\u80fd\u9760\u65f6\u95f4\u6233\u6765\u5224\u65ad\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u5bf9\u5e94\u5173\u7cfb\u3002\u8c03\u8bd5\u590d\u6742\u7684\u591a\u4ece\u7ad9 RTU \u603b\u7ebf\u65f6\uff0c\u5efa\u8bae\u5728 Wireshark \u91cc\u6309 Modbus \u5730\u5740\u8fc7\u6ee4\uff0c\u628a\u6bcf\u4e2a\u4ece\u7ad9\u7684\u6d41\u91cf\u5206\u5f00\u770b\u3002\n\nWireshark \u7684 Modbus \u89e3\u6790\u5668\u4ece 3.x \u7248\u672c\u5f00\u59cb\u652f\u6301\u5f02\u5e38\u7801\u7684\u4e2d\u6587\u663e\u793a\u3002\u5728 Preferences \u2192 Protocols \u2192 Modbus \u91cc\u52fe\u9009 Exception \u7684\u89e3\u6790\u9009\u9879\u3002\u4f46\u6ce8\u610f\uff1aWireshark \u53ea\u80fd\u89e3\u6790\u6807\u51c6\u5f02\u5e38\u7801 01~0A\uff0c\u5382\u5546\u81ea\u5b9a\u4e49\u7801\u4f1a\u663e\u793a\u6570\u5b57\u800c\u975e\u63cf\u8ff0\u6587\u672c\u3002\n\n\u8fd8\u6709\u4e00\u4e2a Wireshark \u5c0f\u6280\u5de7\uff1a\u7528 `modbus.exception_code` \u505a\u663e\u793a\u8fc7\u6ee4\u5668\u3002`modbus.exception_code == 2` \u8fc7\u6ee4\u51fa\u6240\u6709 0x02 \u5f02\u5e38\u5e27\u3002`modbus.exception_code >= 1 && modbus.exception_code <= 10` \u8fc7\u6ee4\u6240\u6709\u6807\u51c6\u5f02\u5e38\u3002\u5728\u73b0\u573a\u6392\u67e5\u65f6\uff0c\u5148\u770b\u5168\u5c40\u7edf\u8ba1\u2014\u2014Statistics \u2192 Protocol Hierarchy \u2192 Modbus\uff0c\u80fd\u770b\u5230\u5f02\u5e38\u5e27\u5360\u901a\u4fe1\u603b\u91cf\u7684\u767e\u5206\u6bd4\u3002\u5982\u679c\u5f02\u5e38\u5e27\u8d85\u8fc7 10%\uff0c\u4f60\u7684\u914d\u7f6e\u5927\u6982\u7387\u6709\u95ee\u9898\u3002\u5982\u679c\u53ea\u6709\u5076\u53d1\u7684 0x06\uff0c\u90a3\u662f\u65f6\u5e8f\u95ee\u9898\u3002\u5982\u679c\u6301\u7eed 0x04\uff0c\u51c6\u5907\u6362\u8bbe\u5907\u3002\n\n## Modbus Poll \u91cc\u7684\u5f02\u5e38\u63d0\u793a\n\nModbus Poll \u662f\u6700\u5e38\u7528\u7684\u8c03\u8bd5\u5de5\u5177\u3002\u5b83\u7684\u5f02\u5e38\u4fe1\u606f\u76f4\u63a5\u663e\u793a\u5728\u7a97\u53e3\u5e95\u90e8\u72b6\u6001\u680f\uff0c\u957f\u8fd9\u6837\uff1a\n\n```\nModbus Exception Response\nFunction: 3, Exception: 2 (Illegal Data Address)\n```\n\n\u7b2c\u4e00\u773c\u770b\u5230\u7ea2\u5b57\u522b\u614c\uff0c\u5148\u770b Function \u662f\u4ec0\u4e48\uff0c\u518d\u770b Exception \u662f\u4ec0\u4e48\u3002\u529f\u80fd\u7801\u544a\u8bc9\u4f60\u54ea\u4e2a\u64cd\u4f5c\u62a5\u9519\u4e86\uff0c\u5f02\u5e38\u7801\u544a\u8bc9\u4f60\u4e3a\u4ec0\u4e48\u3002\n\n\u6253\u5f00 Display \u2192 Communication\uff0c\u80fd\u770b\u5230\u5b8c\u6574\u7684\u6536\u53d1\u62a5\u6587\u3002\u5f02\u5e38\u5e27\u7528\u7ea2\u8272\u6807\u8bb0\uff0c\u70b9\u5f00\u770b\u539f\u59cb\u5341\u516d\u8fdb\u5236\uff1a\n\n```\nTx: 01 03 00 00 00 01 84 0A\nRx: 01 83 02 C0 F1\n```\n\n`Rx` \u7684\u7b2c\u4e8c\u5b57\u8282\u662f 0x83\uff08=0x03|0x80\uff09\uff0c\u7b2c\u4e09\u5b57\u8282 0x02 \u5c31\u662f\u5f02\u5e38\u7801\u3002`C0 F1` \u662f CRC\u3002Modbus Poll \u5e2e\u4f60\u89e3\u6790\u51fa\u6765\u4e86\uff0c\u4f46\u5b66\u4f1a\u81ea\u5df1\u770b\u539f\u59cb\u5e27\u662f\u4e00\u9879\u57fa\u672c\u529f\u2014\u2014\u4e0a\u7ebf\u90e8\u7f72\u540e\u4f60\u4e0d\u4f1a\u6c38\u8fdc\u6709 Modbus Poll \u53ef\u4ee5\u7528\u3002\n\n\u540c\u4e00\u4e2a\u8bf7\u6c42\u8fde\u7eed\u62a5 0x02\uff0c\u5148\u522b\u6539\u5730\u5740\uff0c\u5148\u786e\u8ba4\u4f60\u7684\u8d77\u59cb\u5730\u5740\u548c\u6570\u91cf\u662f\u5426\u5728\u4ece\u7ad9\u624b\u518c\u5217\u51fa\u7684\u6709\u6548\u8303\u56f4\u5185\u3002\u5f88\u591a\u65f6\u5019\u662f\u5730\u5740\u8ba1\u7b97\u903b\u8f91\u9519\u4e86\uff0c\u4e0d\u662f\u4f60\u5730\u5740\u5199\u9519\u4e86\u3002\u5c24\u5176\u662f\u4ece 1-based \u5bc4\u5b58\u5668\u5730\u5740\u5207\u6362\u5230 0-based PDU \u5730\u5740\u7684\u65f6\u5019\u2014\u2014\u8fd9\u4e2a\u5751\u57fa\u672c\u6bcf\u4e2a\u65b0\u624b\u90fd\u8981\u8e29\u4e00\u6b21\u3002\n\n## \u8c03\u8bd5\u65b9\u6cd5\u8bba\uff1a\u6536\u5230\u5f02\u5e38\u7801\u540e\u7684\u6392\u67e5\u6e05\u5355\n\n\u73b0\u573a\u51fa\u4e86\u5f02\u5e38\u7801\uff0c\u6309\u4e0b\u9762\u8fd9\u4e2a\u987a\u5e8f\u8d70\u2014\u2014\u4e0d\u662f\u6807\u51c6\u64cd\u4f5c\u6d41\u7a0b\uff0c\u662f\u8001\u5de5\u7a0b\u5e08\u7684\u8840\u6cea\u7ecf\u9a8c\u3002\n\n**\u7b2c\u4e00\u6b65\uff1a\u786e\u8ba4\u662f\u54ea\u4e2a\u4ece\u7ad9\u3001\u54ea\u4e2a\u529f\u80fd\u7801\u3001\u54ea\u4e2a\u5f02\u5e38\u7801**\n\n\u56e0\u4e3a\u73b0\u573a\u901a\u5e38\u4e0d\u6b62\u4e00\u53f0\u4ece\u7ad9\u3002\u7528 Modbus Poll \u6216 Wireshark \u6293\u539f\u59cb\u62a5\u6587\uff0c\u62ff\u5230\u4ece\u7ad9\u5730\u5740 + \u529f\u80fd\u7801 + \u5f02\u5e38\u7801\u8fd9\u4e09\u4e2a\u6570\u3002\u5982\u679c\u4f60\u662f\u7528\u811a\u672c\u5728\u6d4b\uff0c\u52a0\u4e00\u884c `print(hex(response[0]), hex(response[1]), hex(response[2]))`\uff0c\u522b\u53ea\u770b\u65e5\u5fd7\u91cc\u7684\u300c\u901a\u4fe1\u5931\u8d25\u300d\u3002\n\n**\u7b2c\u4e8c\u6b65\uff1a\u5f02\u5e38\u7801\u5206\u7c7b\u2014\u2014\u8f6f\u4ef6\u539f\u56e0\u8fd8\u662f\u786c\u4ef6\u539f\u56e0\uff1f**\n\n0x01 \/ 0x02 \/ 0x03 \u5927\u6982\u7387\u662f\u4f60\u7684\u8bf7\u6c42\u6709\u95ee\u9898\u3002\u67e5\u914d\u7f6e\u3001\u67e5\u5730\u5740\u6620\u5c04\u3001\u67e5\u6570\u636e\u8303\u56f4\u30020x04 \/ 0x0A \u5927\u6982\u7387\u662f\u4ece\u7ad9\u6216\u94fe\u8def\u6709\u95ee\u9898\u3002\u5148\u65ad\u7535\u91cd\u542f\u4ece\u7ad9\u8bd5\u8bd5\u2014\u2014\u5982\u679c\u662f 0x04 \u53d8\u6b63\u5e38\u4e86\uff0c\u8bf4\u660e\u662f\u8bbe\u5907\u5185\u90e8\u6545\u969c\u6062\u590d\uff0c\u4f46\u4e0d\u4ee3\u8868\u6839\u672c\u539f\u56e0\u5df2\u89e3\u51b3\u30020x06 \u662f\u65f6\u5e8f\u95ee\u9898\uff0c\u8c03\u6162\u8f6e\u8be2\u95f4\u9694\u3002\n\n**\u7b2c\u4e09\u6b65\uff1a\u9694\u79bb\u53d8\u91cf**\n\n\u540c\u4e00\u53f0\u4e3b\u7ad9\uff0c\u6362\u4e00\u4e2a\u4ece\u7ad9\u5730\u5740\u8bd5\u8bd5\u3002\u80fd\u901a\u4fe1 \u2192 \u95ee\u9898\u5728\u539f\u4ece\u7ad9\u3002\u4e0d\u80fd\u901a\u4fe1 \u2192 \u95ee\u9898\u5728\u4e3b\u7ad9\u7aef\u6216\u603b\u7ebf\u3002\u540c\u4e00\u4e2a\u4ece\u7ad9\u5730\u5740\uff0c\u7528 Modbus Poll \u8bd5\u8bd5\u3002\u80fd\u901a\u4fe1 \u2192 \u4f60\u7684\u4e0a\u4f4d\u673a\u4ee3\u7801\u6709\u95ee\u9898\u3002\u4e0d\u80fd\u901a\u4fe1 \u2192 \u4ece\u7ad9\u6216\u94fe\u8def\u6709\u95ee\u9898\u3002\u8fd9\u662f\u6700\u5e38\u89c1\u7684\u4e8c\u5206\u6392\u67e5\u6cd5\uff0c\u4f46\u5f88\u591a\u4eba\u8df3\u8fc7\u4e86\u8fd9\u4e00\u6b65\uff0c\u76f4\u63a5\u6000\u7591\u786c\u4ef6\u574f\u4e86\u3002\n\n**\u7b2c\u56db\u6b65\uff1a\u770b\u624b\u518c**\n\n\u5f02\u5e38\u7801\u51fa\u6765\u4e86\uff0c\u7ffb\u4ece\u7ad9\u624b\u518c\u7684 Modbus \u901a\u4fe1\u7ae0\u8282\u3002\u6709\u4e9b\u5382\u5546\u4f1a\u5217\u51fa\u6240\u6709\u53ef\u80fd\u8fd4\u56de\u7684\u5f02\u5e38\u7801\u548c\u89e6\u53d1\u6761\u4ef6\u3002\u5982\u679c\u624b\u518c\u6ca1\u6709\u5f02\u5e38\u7801\u8868\uff0c\u627e\u5730\u5740\u6620\u5c04\u8868\uff0c\u624b\u52a8\u5bf9\u7167\u4f60\u7684\u8bf7\u6c42\u5730\u5740\u662f\u5426\u5728\u6709\u6548\u8303\u56f4\u5185\u3002\u5f88\u591a\u73b0\u573a\u7684\u300c\u901a\u4fe1\u6545\u969c\u300d\u5176\u5b9e\u662f\u4f60\u8bfb\u4e86\u4e00\u4e2a\u4fdd\u7559\u5730\u5740\u6216\u8005\u53ea\u5199\u5730\u5740\u3002\n\n**\u7b2c\u4e94\u6b65\uff1a\u6293\u5305**\n\n\u7528 Wireshark \u6216\u8005\u4e32\u53e3\u76d1\u63a7\u5de5\u5177\u6293\u539f\u59cb\u62a5\u6587\u3002\u770b\u7684\u662f\uff1a\u4e3b\u7ad9\u5230\u5e95\u53d1\u51fa\u4e86\u4ec0\u4e48\uff1f\u4ece\u7ad9\u5230\u5e95\u56de\u590d\u4e86\u4ec0\u4e48\uff1f\u6709\u6ca1\u6709 CRC \u9519\u8bef\uff1f\u6709\u6ca1\u6709\u5e27\u4e0d\u5b8c\u6574\uff1f\u5f88\u591a\u65f6\u5019\u4f60\u770b\u65e5\u5fd7\u4ee5\u4e3a\u53d1\u51fa\u53bb\u4e86 01 03 00 00 00 01\uff0c\u5b9e\u9645\u6293\u5305\u53d1\u73b0\u6ce2\u7279\u7387\u9519\u4e86\u4ece\u7ad9\u5f53\u566a\u97f3\u6254\u4e86\u3002\u4e0d\u8981\u76f8\u4fe1\u4f60\u7684\u4ee3\u7801\u65e5\u5fd7\uff0c\u8981\u76f8\u4fe1\u6293\u5305\u5de5\u5177\u3002\n\n**\u7b2c\u516d\u6b65\uff1a\u66ff\u6362\u6d4b\u8bd5**\n\n\u6362\u4e00\u53f0\u540c\u578b\u53f7\u7684\u65b0\u4ece\u7ad9\u63a5\u4e0a\u53bb\uff0c\u540c\u6837\u7684\u8bf7\u6c42\u770b\u7ed3\u679c\u3002\u5982\u679c\u65b0\u8bbe\u5907\u6b63\u5e38\uff0c\u539f\u8bbe\u5907\u8fd4\u5f02\u5e38\u7801\u2014\u2014\u8bbe\u5907\u786c\u4ef6\u6545\u969c\u3002\u5982\u679c\u65b0\u8bbe\u5907\u4e5f\u8fd4\u540c\u6837\u7684\u5f02\u5e38\u7801\u2014\u2014\u4f60\u7684\u8bf7\u6c42\u6709\u95ee\u9898\u3002\u5982\u679c\u624b\u5934\u6ca1\u6709\u5907\u7528\u8bbe\u5907\uff0c\u6362\u4e00\u4e2a\u786e\u5b9a\u80fd\u6b63\u5e38\u5de5\u4f5c\u7684\u4ece\u7ad9\u5730\u5740\u6765\u6d4b\u901a\u4fe1\u94fe\u8def\u3002\u94fe\u8def\u7684\u5acc\u7591\u6392\u9664\u4e86\uff0c\u95ee\u9898\u5c31\u5728\u7279\u5b9a\u8bbe\u5907\u4e0a\u3002\n\n**\u7b2c\u4e03\u6b65\uff1a\u5982\u679c\u8fd8\u662f\u641e\u4e0d\u5b9a**\n\n\u628a\u539f\u59cb\u62a5\u6587\uff08\u5341\u516d\u8fdb\u5236\uff09\u3001\u4ece\u7ad9\u578b\u53f7\u548c\u56fa\u4ef6\u7248\u672c\u3001\u4f60\u7684\u4e3b\u7ad9\u5e73\u53f0\u4fe1\u606f\u53d1\u7ed9\u4ece\u7ad9\u5382\u5546\u7684 FAE\u3002\u522b\u53d1\u65e5\u5fd7\u622a\u56fe\uff0c\u53d1\u539f\u59cb\u62a5\u6587\u2014\u2014FAE \u770b\u539f\u59cb\u62a5\u6587\u6bd4\u770b\u4f60\u7684\u63cf\u8ff0\u51c6\u5f97\u591a\u3002\u5982\u679c FAE \u4e5f\u4e0d\u56de\uff0c\u53bb modbus.cn \u8bba\u575b\u8d34\u539f\u59cb\u62a5\u6587\u6c42\u52a9\u3002\u793e\u533a\u7684\u8c03\u8bd5\u7ecf\u9a8c\u6709\u65f6\u6bd4\u5382\u5546\u624b\u518c\u8fd8\u9760\u8c31\uff0c\u56e0\u4e3a\u624b\u518c\u662f\u7406\u8bba\uff0c\u793e\u533a\u662f\u8840\u6cea\u3002\n\n**\u8865\u5145\uff1a\u81ea\u5df1\u5199 Modbus \u9a71\u52a8\u65f6\u7684\u5f02\u5e38\u7801\u5904\u7406\u6a21\u677f**\n\n\u5982\u679c\u4f60\u5728\u5199\u4e0a\u4f4d\u673a\u7684 Modbus \u4e3b\u7ad9\u9a71\u52a8\uff08\u7528 C\/Python\/Node.js \u7b49\uff09\uff0c\u5f02\u5e38\u5e27\u5904\u7406\u81f3\u5c11\u8981\u8986\u76d6\u8fd9\u51e0\u79cd\u60c5\u51b5\uff1a\n\n1. \u68c0\u67e5\u54cd\u5e94\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u662f\u5426\u7b49\u4e8e\u8bf7\u6c42\u7684\u4ece\u7ad9\u5730\u5740\uff08\u5730\u5740\u4e0d\u5339\u914d = \u4e0d\u662f\u7ed9\u4f60\u7684\u54cd\u5e94\uff0c\u4e22\u5f03\uff09\n2. \u529f\u80fd\u7801\u7684 bit 7 \u662f\u5426\u4e3a 1\uff08\u4e3a 1 \u5219\u63d0\u53d6\u5f02\u5e38\u7801\uff0c\u4e3a 0 \u5219\u6b63\u5e38\u89e3\u6790\u6570\u636e\u533a\uff09\n3. \u5f02\u5e38\u7801 0x05 \u7279\u6b8a\u5904\u7406\uff1a\u4e0d\u629b\u51fa\u5f02\u5e38\uff0c\u8fdb\u5165\u7b49\u5f85\u72b6\u6001\uff0c\u8f6e\u8be2\u72b6\u6001\u5bc4\u5b58\u5668\u6216\u8d85\u65f6\u91cd\u53d1\n4. \u5f02\u5e38\u7801 0x06 \u7279\u6b8a\u5904\u7406\uff1a\u5ef6\u8fdf 50~100ms \u540e\u91cd\u8bd5\uff0c\u6700\u591a\u91cd\u8bd5 3 \u6b21\n5. \u5176\u4ed6\u5f02\u5e38\u7801\uff1a\u8bb0\u5f55\u65e5\u5fd7\u3001\u901a\u77e5\u4e0a\u4f4d\u5c42\u8fdb\u884c\u9519\u8bef\u5904\u7406\uff08\u544a\u8b66\u3001\u91cd\u8bd5\u3001\u5207\u6362\u5907\u7528\u94fe\u8def\u7b49\uff09\n6. \u5382\u5546\u81ea\u5b9a\u4e49\u7801 0x80~0xFF\uff1a\u9700\u8981\u8bbe\u5907\u578b\u53f7\u76f8\u5173\u7684\u5b57\u5178\u6765\u89e3\u6790\uff0c\u5426\u5219\u6309 Unknown Exception \u5904\u7406\n\n\u9519\u8bef\u7684\u505a\u6cd5\u662f\u628a\u6240\u6709\u5f02\u5e38\u7801\u90fd\u5f53\u4f5c\u300c\u901a\u4fe1\u5931\u8d25\u300d\u7136\u540e\u91cd\u8bd5\u2014\u20140x02 \u91cd\u8bd5\u4e00\u4e07\u6b21\u4e5f\u662f 0x02\uff0c\u5730\u5740\u9519\u4e86\u5c31\u662f\u9519\u4e86\u3002\u6b63\u786e\u7684\u505a\u6cd5\u662f\u6839\u636e\u5f02\u5e38\u7801\u5206\u7c7b\u91c7\u53d6\u4e0d\u540c\u7b56\u7565\u3002\u8fd9\u90e8\u5206\u903b\u8f91\u5199\u597d\u4e86\uff0c\u4f60\u7684\u9a71\u52a8\u5c31\u80fd\u9002\u914d\u5e02\u9762 90% \u7684 Modbus \u4ece\u7ad9\u8bbe\u5907\u3002\u5269\u4e0b\u7684 10% \u662f\u90a3\u4e9b\u4e0d\u6309\u6807\u51c6\u8fd4\u56de\u5f02\u5e38\u7801\u7684\u5382\u5546\u2014\u2014\u5b83\u4eec\u7528\u6b63\u5e38\u54cd\u5e94\u66ff\u4ee3\u5f02\u5e38\u54cd\u5e94\uff0c\u628a\u9519\u8bef\u4fe1\u606f\u585e\u5728\u5bc4\u5b58\u5668\u6570\u636e\u91cc\u3002\u9047\u5230\u8fd9\u79cd\u8bbe\u5907\u53ea\u80fd\u7ffb\u4e13\u7528\u624b\u518c\u3002\n\n## \u5f02\u5e38\u7801\u901f\u67e5\u8868\n\n\u5f02\u5e38\u7801\u540d\u79f0\u4e00\u53e5\u8bdd\u89e3\u91ca0x01\u975e\u6cd5\u529f\u80fd\u7801\u4ece\u7ad9\u4e0d\u652f\u6301\u4f60\u53d1\u7684\u529f\u80fd\u7801\uff0c\u6216\u5f53\u524d\u72b6\u6001\u4e0d\u5141\u8bb80x02\u975e\u6cd5\u6570\u636e\u5730\u5740\u8bf7\u6c42\u7684\u5730\u5740\u5728\u4ece\u7ad9\u7684\u5bc4\u5b58\u5668\u6620\u5c04\u91cc\u4e0d\u5b58\u57280x03\u975e\u6cd5\u6570\u636e\u503c\u5730\u5740\u5b58\u5728\u4f46\u5199\u7684\u503c\u8d85\u51fa\u5141\u8bb8\u8303\u56f4\u6216\u5199\u4e86\u53ea\u8bfb\u5bc4\u5b58\u56680x04\u4ece\u7ad9\u8bbe\u5907\u6545\u969c\u4ece\u7ad9\u5185\u90e8\u786c\u4ef6\u6216\u56fa\u4ef6\u51fa\u4e86\u4e0d\u53ef\u6062\u590d\u7684\u95190x05\u786e\u8ba4 (ACK)\u4e0d\u662f\u9519\u8bef\uff0c\u4ece\u7ad9\u5728\u5904\u7406\u957f\u8017\u65f6\u64cd\u4f5c\uff0c\u7b49\u77400x06\u4ece\u7ad9\u5fd9\u4ece\u7ad9\u73b0\u5728\u6ca1\u7a7a\u5904\u7406\uff0c\u7a0d\u540e\u91cd\u8bd50x0A\u7f51\u5173\u8def\u5f84\u4e0d\u53ef\u7528\u7f51\u5173\u5230\u4e0b\u6e38\u4ece\u7ad9\u4e0d\u901a\uff0c\u6216\u914d\u7f6e\u4e0d\u5339\u914d0x80~FF\u5382\u5546\u81ea\u5b9a\u4e49\u7ffb\u5404\u81ea\u7684\u624b\u518c\uff0c\u8bed\u4e49\u4e0d\u901a\u7528\n\n\u8fd9\u5f20\u8868\u5efa\u8bae\u6253\u5370\u51fa\u6765\u8d34\u5728\u8c03\u8bd5\u7535\u8111\u65c1\u8fb9\u3002\u73b0\u573a\u51fa\u5f02\u5e38\u7801\u4e0d\u7528\u638f\u624b\u673a\u641c\uff0c\u770b\u4e00\u773c\u8868\u5c31\u77e5\u9053\u5927\u6982\u65b9\u5411\u3002\u5177\u4f53\u7684\u8bca\u65ad\u65b9\u6cd5\uff0c\u56de\u5230\u4e0a\u9762\u6bcf\u4e2a\u5f02\u5e38\u7801\u7684\u6848\u4f8b\u91cc\u627e\u2014\u2014\u6240\u6709\u6848\u4f8b\u90fd\u662f\u73b0\u573a\u78b0\u8fc7\u7684\uff0c\u4e0d\u662f\u7f16\u7684\u3002\n\n---\n*modbus.cn*\n"