"# Modbus \u534f\u8bae\u57fa\u672c\u539f\u7406-Modbus\u901a\u8baf\u534f\u8bae\u8981\u70b9\u7b2c2\u90e8\u5206\n\n> 2023-10-02 | 2023-10-02\n> https:\/\/www.modbus.cn\/en\/25163.html\n\n**Modbus \u534f\u8bae\u6807\u51c6**\n\n---\n\n## **1\u3001 Modbus\u7b80\u4ecb**\n\nModbus \u662f\u7531 Modicon\uff08\u73b0\u4e3a\u65bd\u8010\u5fb7\u7535\u6c14\u516c\u53f8\u7684\u4e00\u4e2a\u54c1\u724c\uff09\u5728 1979 \u5e74\u53d1\u660e\u7684\uff0c\u662f\u5168\u7403\u7b2c\u4e00\u4e2a\u771f\u6b63 \u7528\u4e8e\u5de5\u4e1a\u73b0\u573a\u7684\u603b\u7ebf\u534f\u8bae\u3002ModBus \u7f51\u7edc\u662f\u4e00\u4e2a\u5de5\u4e1a\u901a\u4fe1\u7cfb\u7edf\uff0c\u7531\u5e26\u667a\u80fd\u7ec8\u7aef\u7684\u53ef\u7f16\u7a0b\u5e8f\u63a7\u5236\u5668\u548c\u8ba1\u7b97\u673a\u901a\u8fc7\u516c\u7528\u7ebf\u8def\u6216\u5c40\u90e8\u4e13 \u7528\u7ebf\u8def\u8fde\u63a5\u800c\u6210\u3002\u5176\u7cfb\u7edf\u7ed3\u6784\u65e2\u5305\u62ec\u786c\u4ef6\u3001\u4ea6\u5305\u62ec\u8f6f\u4ef6\u3002\u5b83\u53ef\u5e94\u7528\u4e8e\u5404\u79cd\u6570\u636e\u91c7\u96c6\u548c\u8fc7\u7a0b\u76d1\u63a7\u3002\u4e3a\u66f4\u597d\u5730\u666e\u53ca\u548c\u63a8\u52a8 Modbus \u5728\u57fa\u4e8e\u4ee5\u592a\u7f51\u4e0a\u7684\u5206\u5e03\u5f0f\u5e94\u7528\uff0c\u76ee\u524d\u65bd\u8010\u5fb7\u516c\u53f8\u5df2\u5c06 Modbus \u534f\u8bae\u7684 \u6240\u6709\u6743\u79fb\u4ea4\u7ed9 IDA\uff08Interface for Distributed Automation\uff0c\u5206\u5e03\u5f0f\u81ea\u52a8\u5316\u63a5\u53e3\uff09\u7ec4\u7ec7\uff0c\u5e76\u6210\u7acb\u4e86 Modbus-IDA \u7ec4\u7ec7\uff0c\u4e3a Modbus \u4eca\u540e\u7684\u53d1\u5c55\u5960\u5b9a\u4e86\u57fa\u7840\u3002\n\n\u5728\u4e2d\u56fd\uff0cModbus \u5df2\u7ecf\u6210\u4e3a\u56fd\u5bb6\u6807\u51c6\uff0c\u5e76\u6709\u4e13\u4e1a\u7684\u89c4\u8303\u6587\u6863\uff0c\u611f\u5174\u8da3\u7684\u53ef\u4ee5\u53bb\u67e5\u9605\u76f8\u5173\u7684\u6587\u4ef6\uff0c\u8be6\u60c5\u5982\u4e0b\uff1a\u6807\u51c6\u7f16\u53f7\u4e3a\uff1a**GB\/T19582-2008**\u6587\u4ef6\u540d\u79f0\uff1a\u300a\u57fa\u4e8e Modbus \u534f\u8bae\u7684\u5de5\u4e1a\u81ea\u52a8\u5316\u7f51\u7edc\u89c4\u8303\u300b\n\n\u4e3b\u8981\u6709\u4e09\u90e8\u5206\u7684\u5185\u5bb9\uff0c\u5206\u522b\u5982\u4e0b\uff1a\n\n\u300aGB\/T 19582.1-2008 \u7b2c 1 \u90e8\u5206\uff1aModbus \u5e94\u7528\u534f\u8bae\u300b\n\n\u300aGB\/T 19582.2-2008 \u7b2c 2 \u90e8\u5206\uff1aModbus \u534f\u8bae\u5728\u4e32\u884c\u94fe\u8def\u4e0a\u7684\u5b9e\u73b0\u6307\u5357\u300b\n\n\u300aGB\/T 19582.3-2008 \u7b2c 3 \u90e8\u5206: Modbus \u534f\u8bae\u5728 TCP\/IP \u4e0a\u7684\u5b9e\u73b0\u6307\u5357\u300b\n\n**2\u3001Modbus\u534f\u8bae\u6982\u8ff0**\n\nModbus\u662f\u4e00\u4e2a\u4e3b-\u4ece\u6a21\u5f0f\u7684\u901a\u4fe1\u534f\u8bae\uff0c\u5c5e\u4e8e\u6570\u636e\u94fe\u8def\u5c42\u4e0a\u7684\u534f\u8bae\uff0c\u534f\u8bae\u672c\u8eab\u4e0d\u6d89\u53ca\u5177\u4f53\u7684\u786c\u4ef6\u8981\u6c42\u3002\u5e38\u89c1\u7684\u5e94\u7528Modbus\u534f\u8bae\u7684\u7269\u7406\u63a5\u53e3\u6709RS-485\u3001RS232\u3001USART\u7b49\u7684\u901a\u4fe1\u94fe\u8def\u4e2d\u3002Modbus\u534f\u8bae\u4e2d\uff0c\u4e00\u4e2a\u65f6\u523b\u5185\u53ea\u5141\u8bb8\u6709\u4e00\u4e2a\u4e3b\u673a\u8fde\u63a5\u4e8e\u603b\u7ebf\uff0c\u591a\u4e2a\u4ece\u673a\u8fde\u63a5\u4e8e\u603b\u7ebf\u4e0a\uff0c\u901a\u4fe1\u90fd\u662f\u53ea\u80fd\u7531\u4e3b\u673a\u53d1\u8d77\uff0c\u4ece\u673a\u8fdb\u884c\u54cd\u5e94\u3002\u4e0d\u80fd\u4ece\u4ece\u673a\u4e3b\u52a8\u53d1\u8d77\u901a\u4fe1\u3002\n\n**3\u3001Modbus \u4e3b\u4ece\u673a\u901a\u4fe1\u6a21\u5f0f**\n\n\u4e3b\u673a\u548c\u4ece\u673a\u4e4b\u95f4\u7684\u901a\u4fe1\uff0c\u53ef\u4ee5\u7528\u4e24\u79cd\u6a21\u5f0f\u8fdb\u884c\uff1a\u5e7f\u64ad\u901a\u77e5\u6a21\u5f0f\u3001\u5355\u64ad\u70b9\u5bf9\u70b9\u6a21\u5f0f\u3002\n\n**3.1\u3001\u5355\u64ad\u70b9\u5bf9\u70b9\u6a21\u5f0f**\n\n\u4e3b\u673a\u6309\u7167\u4ece\u673a\u7684\u660e\u786e\u5730\u5740\u8bbf\u95ee\u76f8\u5e94\u7684\u4ece\u673a\uff0c\u4ece\u673a\u63a5\u5230\u6765\u81ea\u4e3b\u673a\u7684\u8bf7\u6c42\u5e76\u5904\u7406\u5b8c\u8bf7\u6c42\u540e\uff0c\u4ece\u673a\u4f1a\u5411\u4e3b\u673a\u8fd4\u56de\u4e00\u4e2a\u5e94\u7b54\uff0c\u5b8c\u6210\u4e00\u4e2a\u901a\u4fe1\u3002\u5728\u8fd9\u79cd\u6a21\u5f0f\uff0c\u4e00\u4e2a Modbus \u4e8b\u52a1\u5904\u7406\u5305\u542b 2 \u4e2a\u62a5\u6587\uff1a\u4e00\u4e2a\u6765\u81ea\u4e3b\u673a\u7684\u8bf7\u6c42\uff0c\u4e00\u4e2a\u6765\u81ea\u4ece\u673a\u7684\u5e94\u7b54\u3002\u5728\u603b\u7ebf\u4e0a\uff0c\u6bcf\u4e2a\u4ece\u673a\u90fd\u5fc5\u987b\u6709\u552f\u4e00\u7684\u4ece\u673a\u5730\u5740 (1 \u5230 247)\uff0c\u8fd9\u6837\u624d\u80fd\u533a\u522b\u4e8e\u5176\u5b83\u8282\u70b9\u88ab\u72ec\u7acb\u7684\u5bfb\u5740\u3002\n\n**3.2\u3001\u5e7f\u64ad\u901a\u77e5\u6a21\u5f0f**\n\n\u4e3b\u673a\u5411\u6240\u603b\u7ebf\u901a\u8fc7\u5e7f\u64ad\u6307\u4ee4\u53d1\u9001\u8bf7\u6c42\uff0c\u6240\u6709\u7684\u4ece\u673a\u90fd\u8981\u63a5\u6536\u6765\u81ea\u4e3b\u673a\u7684\u5e7f\u64ad\u4fe1\u606f\u3002\u5bf9\u4e8e\u4e3b\u673a\u5e7f\u64ad\u7684\u8bf7\u6c42\uff0c\u4ece\u673a\u662f\u6ca1\u6709\u5e94\u7b54\u8fd4\u56de\u7684\u3002\u6240\u6709\u7684\u4ece\u673a\u5fc5\u987b\u8981\u63a5\u53d7\u4e3b\u673a\u7684\u5e7f\u64ad\u6a21\u5199\u529f\u80fd\u3002**\u6ce8\u610f\uff1a\u5730\u5740 0 \u662f\u4e13\u95e8\u7528\u4e8e\u4e3b\u673a\u5411\u5404\u4e2a\u4ece\u673a\u5e7f\u64ad\u6570\u636e\u7684\u3002**\n\n**4\u3001Modbus \u5730\u5740\u89c4\u5219**\n\nModbus \u5bfb\u5740\u7a7a\u95f4\u6709 256 \u4e2a\u4e0d\u540c\u5730\u5740\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220555810.png)\n\n\u5730\u5740 0 \u4e3a\u5e7f\u64ad\u5730\u5740\u3002**\u6240\u6709\u7684\u4ece\u673a\u5fc5\u987b\u8bc6\u522b\u5e7f\u64ad\u5730\u5740\u3002**Modbus \u4e3b\u673a\u672c\u8eab\u662f\u6ca1\u6709\u5730\u5740\u7684\uff0c\u53ea\u6709\u4ece\u673a\u5fc5\u987b\u8981\u6709\u4e00\u4e2a\u5730\u5740\u3002\u8be5\u5730\u5740\u5fc5\u987b\u5728 Modbus \u4e32\u884c\u603b\u7ebf\u4e0a\u552f\u4e00\u3002248~255\u4f5c\u4e3a\u9884\u7559\u4f7f\u7528\u7684\u5730\u5740\u3002\n\n**5\u3001Modbus \u7684\u5e27\u683c\u5f0f**\n\nModbus\u7684\u5e27\u683c\u5f0f\u6309\u7167\u9009\u62e9\u7684\u6a21\u5f0f\u4e0d\u540c\u5e27\u683c\u5f0f\u4e5f\u662f\u6709\u6240\u533a\u522b\u7684\u3002\n\n**5.1\u3001RTU\u6a21\u5f0f**\n\nRTU \u6a21\u5f0f\u4e0b\u7684\u5e27\u683c\u5f0f\u5982\u4e0b\u56fe\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220556894.png)\n\nModbus RTU \u5e27\u603b\u957f\u5ea6\u6700\u5927\u4e3a 256 \u5b57\u8282\u3002RTU \u6a21\u5f0f\u6bcf\u4e2a\u5b57\u8282 ( 11 \u4f4d ) \u7684\u683c\u5f0f\u4e3a** :**8\u2013\u4f4d\u4e8c\u8fdb\u5236\uff0c\u62a5\u6587\u4e2d\u6bcf\u4e2a 8 \u4f4d\u5b57\u8282\u542b\u6709\u4e24\u4e2a 4 \u4f4d\u5341\u516d\u8fdb\u5236\u5b57\u7b26(0\u20139\uff0c A\u2013F)\u6bcf\u5b57\u8282\u7684 bit \u6d41:**1 \u8d77\u59cb\u4f4d****8 \u6570\u636e\u4f4d\uff0c \u9996\u5148\u53d1\u9001\u6700\u4f4e\u6709\u6548\u4f4d****1 \u4f4d\u4f5c\u4e3a\u5947\u5076\u6821\u9a8c****1 \u505c\u6b62\u4f4d**\u5076\u6821\u9a8c\u662f\u8981\u6c42\u7684\uff0c \u5176\u5b83\u6a21\u5f0f ( \u5947\u6821\u9a8c\uff0c \u65e0\u6821\u9a8c ) \u4e5f\u53ef\u4ee5\u4f7f\u7528\u3002\u4e3a\u4e86\u4fdd\u8bc1\u4e0e\u5176\u5b83\u4ea7\u54c1\u7684\u6700\u5927\u517c\u5bb9\u6027\uff0c \u540c\u65f6\u652f\u6301\u65e0\u6821\u9a8c\u6a21\u5f0f\u662f\u5efa\u8bae\u7684\u3002\u9ed8\u8ba4\u6821\u9a8c\u6a21\u5f0f\u6a21\u5f0f \u5fc5\u987b\u4e3a\u5076\u6821\u9a8c\u3002\u6ce8 : \u4f7f\u7528\u65e0\u6821\u9a8c\u8981\u6c42 2 \u4e2a\u505c\u6b62\u4f4d\u3002RTU\u65f6\uff0c\u6bcf\u4e2a\u5b57\u7b26\u6216\u5b57\u8282\u5747\u7531\u6b64\u987a\u5e8f\u53d1\u9001(\u4ece\u5de6\u5230\u53f3)\uff1a\n\n\u6700\u4f4e\u6709\u6548\u4f4d (LSB) . . . \u6700\u9ad8\u6709\u6548\u4f4d (MSB)\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220557895.png)\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220557888.png)\n\n**5.1.1\u3001RTU\u6a21\u5f0f\u4e0b\u7684\u5e27\u901a\u4fe1**\n\n\u7531\u53d1\u9001\u8bbe\u5907\u5c06 Modbus \u62a5\u6587\u6784\u9020\u4e3a\u5e26\u6709\u5df2\u77e5\u8d77\u59cb\u548c\u7ed3\u675f\u6807\u8bb0\u7684\u5e27\u3002\u8fd9\u4f7f\u8bbe\u5907\u53ef\u4ee5\u5728\u62a5\u6587\u7684\u5f00\u59cb\u63a5\u6536 \u65b0\u5e27\uff0c\u5e76\u4e14\u77e5\u9053\u4f55\u65f6\u62a5\u6587\u7ed3\u675f\u3002\u4e0d\u5b8c\u6574\u7684\u62a5\u6587\u5fc5\u987b\u80fd\u591f\u88ab\u68c0\u6d4b\u5230\u800c\u9519\u8bef\u6807\u5fd7\u5fc5\u987b\u4f5c\u4e3a\u7ed3\u679c\u88ab\u8bbe\u7f6e\u3002\u5728 RTU \u6a21\u5f0f\uff0c\u62a5\u6587\u5e27\u7531\u65f6\u957f\u81f3\u5c11\u4e3a 3.5 \u4e2a\u5b57\u7b26\u65f6\u95f4\u7684\u7a7a\u95f2\u95f4\u9694\u533a\u5206\u3002\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220558995.png)\n\n\u6574\u4e2a\u62a5\u6587\u5e27\u5fc5\u987b\u4ee5\u8fde\u7eed\u7684\u5b57\u7b26\u6d41\u53d1\u9001\u3002\u5982\u679c\u4e24\u4e2a\u5b57\u7b26\u4e4b\u95f4\u7684\u7a7a\u95f2\u95f4\u9694\u5927\u4e8e 1.5 \u4e2a\u5b57\u7b26\u65f6\u95f4\uff0c\u5219\u62a5\u6587\u5e27\u88ab\u8ba4\u4e3a\u4e0d\u5b8c\u6574\u5e94\u8be5\u88ab\u63a5\u6536\u8282\u70b9\u4e22\u5f03\u3002\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220558486.png)\n\n\u6ce8\u610f :RTU \u6a21\u5f0f\u4e0b\u63a5\u6536\u6570\u636e\u65f6\uff0c\u7531\u4e8e t1.5 \u548c t3.5 \u7684\u65f6\u95f4\u9694\u8981\u6c42\u7684\u5b58\u5728\uff0c\u4e00\u822c\u5728\u9ad8\u901a\u4fe1\u901f\u7387\u4e0b\uff0c\u4f1a\u5bfc\u81f4 CPU \u8d1f\u62c5\u52a0\u91cd\u3002\u56e0\u6b64\uff0c\u5728\u901a\u4fe1\u901f\u7387\u7b49\u4e8e\u6216\u4f4e\u4e8e 19200 bps \u65f6\uff0c\u8fd9\u4e24\u4e2a\u5b9a\u65f6\u5fc5\u987b\u4e25\u683c\u9075\u5b88\uff1b\u5bf9\u4e8e\u6ce2\u7279\u7387\u5927\u4e8e 19200 bps \u7684\u60c5\u5f62\uff0c\u5e94\u8be5\u4f7f\u7528 2 \u4e2a\u5b9a\u65f6\u7684\u56fa\u5b9a\u503c\uff1a\u5efa\u8bae\u7684\u5b57\u7b26\u95f4\u8d85\u65f6\u65f6\u95f4(t1.5)\u4e3a 750\u00b5s\uff0c\u5e27\u95f4\u7684\u8d85\u65f6\u65f6\u95f4 (t1.5) \u4e3a 1.750ms\u3002\u4e0b\u56fe\u8868\u793a\u4e86\u5bf9 RTU \u4f20\u8f93\u6a21\u5f0f\u72b6\u6001\u56fe\u7684\u63cf\u8ff0\u3002\"\u4e3b\u8282\u70b9\" \u548c \"\u5b50\u8282\u70b9\" \u7684\u4e0d\u540c\u89d2\u5ea6\u5747\u5728\u76f8\u540c\u7684\u56fe\u4e2d\u8868\u793a\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220559655.png)\n\n\u4e0a\u9762\u72b6\u6001\u56fe\u7684\u4e00\u4e9b\u89e3\u91ca:\n\n1\uff09\u4ece \"\u521d\u59cb\" \u6001\u5230 \u201c\u7a7a\u95f2\u201d \u6001\u8f6c\u6362\u9700\u8981 t3.5 \u5b9a\u65f6\u8d85\u65f6: \u8fd9\u4fdd\u8bc1\u5e27\u95f4\u5ef6\u8fdf\n\n2\uff09\u201c\u7a7a\u95f2\u201d \u6001\u662f\u6ca1\u6709\u53d1\u9001\u548c\u63a5\u6536\u62a5\u6587\u8981\u5904\u7406\u7684\u6b63\u5e38\u72b6\u6001\u3002\n\n3\uff09\u5728 RTU \u6a21\u5f0f\uff0c \u5f53\u6ca1\u6709\u6d3b\u52a8\u7684\u4f20\u8f93\u7684\u65f6\u95f4\u95f4\u9694\u8fbe 3.5 \u4e2a\u5b57\u7b26\u957f\u65f6\uff0c\u901a\u4fe1\u94fe\u8def\u88ab\u8ba4\u4e3a\u5728 \u201c\u7a7a\u95f2\u201d \u6001\u3002\n\n4\uff09\u5f53\u94fe\u8def\u7a7a\u95f2\u65f6\uff0c \u5728\u94fe\u8def\u4e0a\u68c0\u6d4b\u5230\u7684\u4efb\u4f55\u4f20\u8f93\u7684\u5b57\u7b26\u88ab\u8bc6\u522b\u4e3a\u5e27\u8d77\u59cb\u3002\u94fe\u8def\u53d8\u4e3a \"\u6d3b\u52a8\" \u72b6\u6001\u3002\u7136\u540e\u5f53\u94fe\u8def\u4e0a\u6ca1\u6709\u5b57\u7b26\u4f20\u8f93\u7684\u65f6\u95f4\u95f4\u4e2a\u8fbe\u5230 t3.5 \u540e\uff0c\u88ab\u8bc6\u522b\u4e3a\u5e27\u7ed3\u675f\u3002\n\n5\uff09\u68c0\u6d4b\u5230\u5e27\u7ed3\u675f\u540e\uff0c\u5b8c\u6210 CRC \u8ba1\u7b97\u548c\u68c0\u9a8c\u3002\u7136\u540e\uff0c\u5206\u6790\u5730\u5740\u57df\u4ee5\u786e\u5b9a\u5e27\u662f\u5426\u53d1\u5f80\u6b64\u8bbe\u5907\uff0c\u5982\u679c\u4e0d\u662f\uff0c \u5219\u4e22\u5f03\u6b64\u5e27\u3002\u4e3a\u4e86\u51cf\u5c11\u63a5\u6536\u5904\u7406\u65f6\u95f4\uff0c\u5730\u5740\u57df\u53ef\u4ee5\u5728\u4e00\u63a5\u5230\u5c31\u5206\u6790\uff0c\u800c\u4e0d\u9700\u8981\u7b49\u5230\u6574\u4e2a\u5e27\u7ed3\u675f\u3002\u8fd9 \u6837\uff0cCRC \u8ba1\u7b97\u53ea\u9700\u8981\u5728\u5e27\u5bfb\u5740\u5230\u8be5\u8282\u70b9 (\u5305\u62ec\u5e7f\u64ad\u5e27) \u65f6\u8fdb\u884c\u3002\n\n**5.1.2\u3001RTU\u6a21\u5f0f\u7684CRC\u6821\u9a8c**\n\n\u5728 RTU \u6a21\u5f0f\u5305\u542b\u4e00\u4e2a\u5bf9\u5168\u90e8\u62a5\u6587\u5185\u5bb9\u6267\u884c\u7684\uff0c\u57fa\u4e8e\u5faa\u73af\u5197\u4f59\u6821\u9a8c (CRC - Cyclical Redundancy Checking) \u7b97\u6cd5\u7684\u9519\u8bef\u68c0\u9a8c\u57df\u3002CRC \u57df\u68c0\u9a8c\u6574\u4e2a\u62a5\u6587\u7684\u5185\u5bb9\u3002\u4e0d\u7ba1\u62a5\u6587\u6709\u65e0\u5947\u5076\u6821\u9a8c\uff0c\u5747\u6267\u884c\u6b64\u68c0\u9a8c\u3002CRC \u5305\u542b\u7531\u4e24\u4e2a 8 \u4f4d\u5b57\u8282\u7ec4\u6210\u7684\u4e00\u4e2a 16 \u4f4d\u503c\u3002CRC \u57df\u4f5c\u4e3a\u62a5\u6587\u7684\u6700\u540e\u7684\u57df\u9644\u52a0\u5728\u62a5\u6587\u4e4b\u540e\u3002\u8ba1\u7b97\u540e\uff0c\u9996\u5148\u9644\u52a0\u4f4e\u5b57\u8282\uff0c\u7136\u540e\u662f\u9ad8\u5b57\u8282\u3002CRC \u9ad8\u5b57 \u8282\u4e3a\u62a5\u6587\u53d1\u9001\u7684\u6700\u540e\u4e00\u4e2a\u5b50\u8282\u3002\u9644\u52a0\u5728\u62a5\u6587\u540e\u9762\u7684 CRC \u7684\u503c\u7531\u53d1\u9001\u8bbe\u5907\u8ba1\u7b97\u3002\u63a5\u6536\u8bbe\u5907\u5728\u63a5\u6536\u62a5\u6587\u65f6\u91cd\u65b0\u8ba1\u7b97 CRC \u7684\u503c\uff0c\u5e76\u5c06\u8ba1 \u7b97\u7ed3\u679c\u4e8e\u5b9e\u9645\u63a5\u6536\u5230\u7684 CRC \u503c\u76f8\u6bd4\u8f83\u3002\u5982\u679c\u4e24\u4e2a\u503c\u4e0d\u76f8\u7b49\uff0c\u5219\u4e3a\u9519\u8bef\u3002CRC \u7684\u8ba1\u7b97, \u5f00\u59cb\u5bf9\u4e00\u4e2a 16 \u4f4d\u5bc4\u5b58\u5668\u9884\u88c5\u5168 1\u3002\u7136\u540e\u5c06\u62a5\u6587\u4e2d\u7684\u8fde\u7eed\u7684 8 \u4f4d\u5b50\u8282\u5bf9\u5176\u8fdb\u884c\u540e\u7eed\u7684\u8ba1 \u7b97\u3002\u53ea\u6709\u5b57\u7b26\u4e2d\u7684 8 \u4e2a\u6570\u636e\u4f4d\u53c2\u4e0e\u751f\u6210 CRC \u7684\u8fd0\u7b97\uff0c\u8d77\u59cb\u4f4d\uff0c\u505c\u6b62\u4f4d\u548c\u6821\u9a8c\u4f4d\u4e0d\u53c2\u4e0e CRC \u8ba1\u7b97\u3002CRC \u7684\u751f\u6210\u8fc7\u7a0b\u4e2d\uff0c \u6bcf\u4e2a 8\u2013\u4f4d\u5b57\u7b26\u4e0e\u5bc4\u5b58\u5668\u4e2d\u7684\u503c\u5f02\u6216\u3002\u7136\u540e\u7ed3\u679c\u5411\u6700\u4f4e\u6709\u6548\u4f4d(LSB)\u65b9\u5411\u79fb\u52a8 (Shift) 1 \u4f4d\uff0c\u800c\u6700\u9ad8\u6709\u6548\u4f4d(MSB)\u4f4d\u7f6e\u5145\u96f6\u3002\u7136\u540e\u63d0\u53d6\u5e76\u68c0\u67e5 LSB\uff1a\u5982\u679c LSB \u4e3a 1\uff0c \u5219\u5bc4\u5b58\u5668\u4e2d\u7684\u503c\u4e0e \u4e00\u4e2a\u56fa\u5b9a\u7684\u9884\u7f6e\u503c\u5f02\u6216\uff1b\u5982\u679c LSB \u4e3a 0\uff0c \u5219\u4e0d\u8fdb\u884c\u5f02\u6216\u64cd\u4f5c\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5c06\u91cd\u590d\u76f4\u5230\u6267\u884c\u5b8c 8 \u6b21\u79fb\u4f4d\u3002\u5b8c\u6210\u6700\u540e\u4e00\u6b21\uff08\u7b2c 8 \u6b21\uff09\u79fb\u4f4d\u53ca\u76f8\u5173\u64cd\u4f5c\u540e\uff0c\u4e0b\u4e00\u4e2a 8 \u4f4d\u5b57\u8282 \u4e0e\u5bc4\u5b58\u5668\u7684\u5f53\u524d\u503c\u5f02\u6216\uff0c\u7136\u540e\u53c8\u540c\u4e0a\u9762\u63cf\u8ff0\u8fc7\u7684\u4e00\u6837\u91cd\u590d 8 \u6b21\u3002\u5f53\u6240\u6709\u62a5\u6587\u4e2d\u5b50\u8282\u90fd\u8fd0\u7b97\u4e4b\u540e\u5f97\u5230\u7684\u5bc4\u5b58 \u5668\u7684\u6700\u7ec8\u503c\uff0c\u5c31\u662f CRC\u3002\n\n**5.2\u3001ASCII\u4f20\u8f93\u6a21\u5f0f**\n\n\u5f53 Modbus \u4e32\u884c\u94fe\u8def\u7684\u8bbe\u5907\u88ab\u914d\u7f6e\u4e3a\u4f7f\u7528 ASCII\u6a21\u5f0f\u901a\u4fe1\u65f6\uff0c\u62a5\u6587\u4e2d\u7684\u6bcf\u4e2a 8 \u4f4d\u5b57\u8282\u4ee5\u4e24\u4e2a ASCII \u5b57\u7b26\u53d1\u9001\u3002\u4e00\u822c\u5728\u901a\u4fe1\u94fe\u8def\u6216\u8005\u8bbe\u5907\u65e0\u6cd5 \u7b26\u5408 RTU \u6a21\u5f0f\u7684\u5b9a\u65f6\u7ba1\u7406\u65f6\u4f7f\u7528\u8be5\u6a21\u5f0f\u3002ASCII\u7684\u5e27\u683c\u5f0f\u5982\u4e0b\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220600312.png)\n\n\u6bd4\u5982 : \u5b57\u8282 0X5B \u4f1a\u88ab\u7f16\u7801\u4e3a\u4e24\u4e2a\u5b57\u7b26 : 0x35 \u548c 0x42 ( ASCII \u7f16\u7801 0x35 =\"5\"\uff0c 0x42 =\"B\" )\u3002**\u6ce8 : \u7531\u4e8e\u4e00\u4e2a\u5b50\u8282\u9700\u8981\u4e24\u4e2a\u5b57\u7b26\uff0c\u6b64\u6a21\u5f0f\u6bd4 RTU \u6548\u7387\u4f4e\u3002**\n\nASCII \u6a21\u5f0f\u6bcf\u4e2a\u5b57\u8282 ( 10 \u4f4d ) \u7684\u683c\u5f0f\u4e3a :\u5341\u516d\u8fdb\u5236\uff0cASCII \u5b57\u7b26 0-9\uff0c A-F\u3002**1 \u8d77\u59cb\u4f4d****7 \u6570\u636e\u4f4d\uff0c \u9996\u5148\u53d1\u9001\u6700\u4f4e\u6709\u6548\u4f4d****1 \u4f4d\u4f5c\u4e3a\u5947\u5076\u6821\u9a8c****1 \u505c\u6b62\u4f4d**\u5076\u6821\u9a8c\u662f\u8981\u6c42\u7684\uff0c \u5176\u5b83\u6a21\u5f0f ( \u5947\u6821\u9a8c\uff0c \u65e0\u6821\u9a8c ) \u4e5f\u53ef\u4ee5\u4f7f\u7528\u3002\u4e3a\u4e86\u4fdd\u8bc1\u4e0e\u5176\u5b83\u4ea7\u54c1\u7684\u6700\u5927\u517c\u5bb9\u6027\uff0c \u540c\u65f6\u652f\u6301\u65e0\u6821\u9a8c\u6a21\u5f0f\u662f\u5efa\u8bae\u7684\u3002\u9ed8\u8ba4\u6821\u9a8c\u6a21\u5f0f\u6a21\u5f0f \u5fc5\u987b\u4e3a\u5076\u6821\u9a8c\u3002\u6ce8 : \u4f7f\u7528\u65e0\u6821\u9a8c\u8981\u6c42 2 \u4e2a\u505c\u6b62\u4f4d\u3002\u5b57\u7b26\u662f\u5982\u4f55\u4e32\u884c\u4f20\u9001\u7684:\u6bcf\u4e2a\u5b57\u7b26\u6216\u5b57\u8282\u5747\u7531\u6b64\u987a\u5e8f\u53d1\u9001(\u4ece\u5de6\u5230\u53f3):\n\n\u6700\u4f4e\u6709\u6548\u4f4d (LSB) . . . \u6700\u9ad8\u6709\u6548\u4f4d (MSB)\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220600817.png)\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220601248.png)\n\n**5.2.1\u3001ASCII\u7684\u62a5\u6587\u5e27**\n\n\u5728 ASCII \u6a21\u5f0f\uff0c \u62a5\u6587\u7528\u7279\u6b8a\u7684\u5b57\u7b26\u533a\u5206\u5e27\u8d77\u59cb\u548c\u5e27\u7ed3\u675f\u3002**\u4e00\u4e2a\u62a5\u6587\u5fc5\u987b\u4ee5\u4e00\u4e2a\u2018\u5192\u53f7\u2019 ( : ) (ASCII \u5341\u516d\u8fdb\u5236 3A )\u8d77\u59cb\uff0c\u4ee5 \u2018\u56de\u8f66-\u6362\u884c\u2019 (CR LF) \u5bf9 (ASCII \u5341\u516d\u8fdb\u5236 0D \u548c 0A) \u7ed3\u675f\u3002**\u6ce8 : LF \u5b57\u7b26\u53ef\u4ee5\u901a\u8fc7\u7279\u5b9a\u7684 Modbus \u5e94\u7528\u547d\u4ee4 (\u53c2\u89c1 Modbus \u5e94\u7528\u534f\u8bae\u89c4\u8303) \u6539\u53d8\u3002\u5bf9\u4e8e\u6240\u6709\u7684\u57df\uff0c\u5141\u8bb8\u4f20\u9001\u7684\u5b57\u7b26\u4e3a\u5341\u516d\u8fdb\u5236 0\u20139\uff0c A\u2013F (ASCII \u7f16\u7801)\u3002\u8bbe\u5907\u8fde\u7eed\u7684\u76d1\u89c6\u603b\u7ebf\u4e0a\u7684 \u2018\u5192 \u53f7\u2019 \u5b57\u7b26\u3002\u5f53\u6536\u5230\u8fd9\u4e2a\u5b57\u7b26\u540e\uff0c\u6bcf\u4e2a\u8bbe\u5907\u89e3\u7801\u540e\u7eed\u7684\u5b57\u7b26\u4e00\u76f4\u5230\u5e27\u7ed3\u675f\u3002\u62a5\u6587\u4e2d\u5b57\u7b26\u95f4\u7684\u65f6\u95f4\u95f4\u9694\u53ef\u4ee5\u8fbe\u4e00\u79d2\u3002\u5982\u679c\u6709\u66f4\u5927\u7684\u95f4\u9694\uff0c\u5219\u63a5\u53d7\u8bbe\u5907\u8ba4\u4e3a\u53d1\u751f\u4e86\u9519\u8bef\u3002\u7279\u522b\u6ce8\u610f\uff1a\u6bcf\u4e2a\u5b57\u7b26\u5b50\u8282\u9700\u8981\u7528\u4e24\u4e2a\u5b57\u7b26\u7f16\u7801\u3002\u56e0\u6b64\uff0c\u4e3a\u4e86\u786e\u4fdd ASCII \u6a21\u5f0f \u548c RTU \u6a21\u5f0f\u5728 Modbus \u5e94 \u7528\u7ea7\u517c\u5bb9\uff0cASCII \u6570\u636e\u57df\u6700\u5927\u6570\u636e\u957f\u5ea6\u4e3a (2x252) \u662f RTU \u6570\u636e\u57df (252) \u7684\u4e24\u500d\u3002\u5fc5\u7136\u7684\uff0c Modbus ASCII \u5e27\u7684\u6700\u5927\u5c3a\u5bf8\u4e3a 513 \u4e2a\u5b57\u7b26\u3002ASCII \u62a5\u6587\u5e27\u7684\u8981\u6c42\u5728\u4e0b\u9762\u7684\u72b6\u6001\u56fe\u4e2d\u7efc\u5408\u3002\"\u4e3b\u8282\u70b9\" \u548c \"\u5b50\u8282\u70b9\" \u7684\u4e0d\u540c\u89d2\u5ea6\u5747\u5728\u76f8\u540c\u7684\u56fe\u4e2d\u8868\u793a\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220601425.png)\n\n\u4e0a\u9762\u72b6\u6001\u56fe\u7684\u4e00\u4e9b\u89e3\u91ca:1\uff09\u201c\u7a7a\u95f2\u201d \u6001\u662f\u6ca1\u6709\u53d1\u9001\u548c\u63a5\u6536\u62a5\u6587\u8981\u5904\u7406\u7684\u6b63\u5e38\u72b6\u6001\u30022\uff09\u6bcf\u6b21\u63a5\u6536\u5230 \":\" \u5b57\u7b26\u8868\u793a\u65b0\u7684\u62a5\u6587\u7684\u5f00\u59cb\u3002\u5982\u679c\u5728\u4e00\u4e2a\u62a5\u6587\u7684\u63a5\u6536\u8fc7\u7a0b\u4e2d\u6536\u5230\u8be5\u5b57\u7b26\uff0c\u5219\u5f53\u524d\u5730\u62a5\u6587 \u88ab\u8ba4\u4e3a\u4e0d\u5b8c\u6574\u5e76\u88ab\u4e22\u5f03\u3002\u800c\u4e00\u4e2a\u65b0\u7684\u63a5\u6536\u7f13\u51b2\u533a\u88ab\u91cd\u65b0\u5206\u914d\u30023\uff09\u68c0\u6d4b\u5230\u5e27\u7ed3\u675f\u540e\uff0c\u5b8c\u6210 LRC \u8ba1\u7b97\u548c\u68c0\u9a8c\u3002\u7136\u540e\uff0c\u5206\u6790\u5730\u5740\u57df\u4ee5\u786e\u5b9a\u5e27\u662f\u5426\u53d1\u5f80\u6b64\u8bbe\u5907\uff0c\u5982\u679c\u4e0d\u662f\uff0c \u5219\u4e22\u5f03\u6b64\u5e27\u3002\u4e3a\u4e86\u51cf\u5c11\u63a5\u6536\u5904\u7406\u65f6\u95f4\uff0c\u5730\u5740\u57df\u53ef\u4ee5\u5728\u4e00\u63a5\u5230\u5c31\u5206\u6790\uff0c\u800c\u4e0d\u9700\u8981\u7b49\u5230\u6574\u4e2a\u5e27\u7ed3\u675f\u3002\n\n**5.2.2\u3001ASCII\u7684LRC\u6821\u9a8c**\n\n\u5728 ASCII \u6a21\u5f0f\uff0c\u5305\u542b\u4e00\u4e2a\u5bf9\u5168\u90e8\u62a5\u6587\u5185\u5bb9\u6267\u884c\u7684\uff0c\u57fa\u4e8e\u7eb5\u5411\u5197\u4f59\u6821\u9a8c (LRC - Longitudinal Redundancy Checking) \u7b97\u6cd5\u7684\u9519\u8bef\u68c0\u9a8c\u57df\u3002LRC \u57df\u68c0\u9a8c\u4e0d\u5305\u62ec\u8d77\u59cb\u201c\u5192\u53f7\u201d\u548c\u7ed3\u5c3e CRLF \u5bf9\u7684\u6574\u4e2a\u62a5 \u6587\u7684\u5185\u5bb9\u3002\u4e0d\u7ba1\u62a5\u6587\u6709\u65e0\u5947\u5076\u6821\u9a8c\uff0c\u5747\u6267\u884c\u6b64\u68c0\u9a8c\u3002LRC \u57df\u4e3a\u4e00\u4e2a\u5b50\u8282\uff0c\u5305\u542b\u4e00\u4e2a 8 \u4f4d\u4e8c\u8fdb\u5236\u503c\u3002LRC \u503c\u7531\u53d1\u9001\u8bbe\u5907\u8ba1\u7b97\uff0c\u7136\u540e\u5c06 LRC \u9644\u5728\u62a5\u6587\u540e\u9762\u3002\u63a5\u6536\u8bbe\u5907\u5728\u63a5\u6536\u62a5\u6587\u65f6\u91cd\u65b0\u8ba1\u7b97 LRC \u7684\u503c\uff0c\u5e76\u5c06\u8ba1\u7b97\u7ed3\u679c\u4e8e\u5b9e\u9645\u63a5\u6536\u5230\u7684 LRC \u503c\u76f8\u6bd4\u8f83\u3002\u5982\u679c\u4e24\u4e2a\u503c\u4e0d \u76f8\u7b49\uff0c\u5219\u4e3a\u9519\u8bef\u3002LRC \u7684\u8ba1\u7b97, \u5bf9\u62a5\u6587\u4e2d\u7684\u6240\u6709\u7684\u8fde\u7eed 8 \u4f4d\u5b57\u8282\u76f8\u52a0\uff0c\u5ffd\u7565\u4efb\u4f55\u8fdb\u4f4d\uff0c\u7136\u540e\u6c42\u51fa\u5176\u4e8c\u8fdb\u5236\u8865\u7801\u3002\u6267\u884c\u68c0 \u9a8c\u9488\u5bf9\u4e0d\u5305\u62ec\u8d77\u59cb\u201c\u5192\u53f7\u201d\u548c\u7ed3\u5c3e CRLF \u5bf9\u7684\u6574\u4e2a ASCII \u62a5\u6587\u57df\u7684\u5185\u5bb9\u3002\u5728 ASCII \u6a21\u5f0f\uff0cLRC \u7684\u7ed3\u679c \u88ab ASCII \u7f16\u7801\u4e3a\u4e24\u4e2a\u5b57\u8282\u5e76\u653e\u7f6e\u4e8e ASCII \u6a21\u5f0f\u62a5\u6587\u5e27\u7684\u7ed3\u5c3e\uff0cCRLF \u4e4b\u524d\u3002\n\n**6\u3001Modbus\u7684\u5f02\u5e38\u7801**\n\nMODBUS \u4e8b\u52a1\u5904\u7406\u7684\u4e00\u822c\u5904\u7406\u8fc7\u7a0b\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220602420.png)\n\n\u4e00\u65e6\u670d\u52a1\u5668\u5904\u7406\u8bf7\u6c42\uff0c\u4f7f\u7528\u5408\u9002\u7684 MODBUS \u670d\u52a1\u5668\u4e8b\u52a1\u5efa\u7acb MODBUS \u54cd\u5e94\u3002\u6839\u636e\u5904\u7406\u7ed3\u679c\uff0c\u53ef\u4ee5\u5efa\u7acb\u4e24\u79cd\u7c7b\u578b\u54cd\u5e94\uff1a\n\n1\uff09 \u4e00\u4e2a\u6b63\u786e\u7684 MODBUS \u54cd\u5e94\uff1a\u54cd\u5e94\u529f\u80fd\u7801 = \u8bf7\u6c42\u529f\u80fd\u7801\n\n2\uff09 \u4e00\u4e2a MODBUS \u5f02\u5e38\u54cd\u5e94\n\n3\uff09\u7528\u6765\u4e3a\u5ba2\u6237\u673a\u63d0\u4f9b\u5904\u7406\u8fc7\u7a0b\u4e2d\u4e0e\u88ab\u53d1\u73b0\u7684\u5dee\u9519\u76f8\u5173\u7684\u4fe1\u606f\uff1b\n\n4\uff09\u54cd\u5e94\u529f\u80fd\u7801 = \u8bf7\u6c42\u529f\u80fd\u7801 + 0x80\uff1b\n\n5\uff09\u63d0\u4f9b\u4e00\u4e2a\u5f02\u5e38\u7801\u6765\u6307\u793a\u5dee\u9519\u539f\u56e0\u3002\n\n**7\u3001Modbus\u7684\u529f\u80fd\u7801**\n\n**7.1\u3001\u529f\u80fd\u7801\u7684\u7c7b\u522b**\n\n\u76ee\u524dModbus\u7684\u529f\u80fd\u4e2d\u53ef\u4ee5\u5206\u4e3a\u4e09\u7c7b\uff1a\u516c\u5171\u529f\u80fd\u7801\u3001\u7528\u6237\u5b9a\u4e49\u529f\u80fd\u7801\u3001\u4fdd\u7559\u529f\u80fd\u7801\u3002\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220603974.png)\n\n\u516c\u5171\u529f\u80fd\u7801 \uff1a\u662f\u5df2\u7ecf\u88ab\u5b9a\u4e49\u7684\u529f\u80fd\u7801\u3002\n\n\u7528\u6237\u5b9a\u4e49\u529f\u80fd\u7801 \uff1a\u6709\u4e24\u4e2a\u53ef\u4ee5\u7531\u7528\u6237\u5b9a\u4e49\u529f\u80fd\u7801\u3002\u8303\u56f4\u4e3a\uff1a65 \u81f3 72 \u548c\u5341\u8fdb\u5236 100 \u81f3 110\u3002\n\n\u4fdd\u7559\u529f\u80fd\u7801 \uff1a\u7279\u6b8a\u60c5\u51b5\u4e0b\u4f7f\u7528\u7684\uff0c\u5e76\u4e14\u5bf9\u516c\u5171\u4f7f\u7528\u662f\u65e0\u6548\u7684\u529f\u80fd\u7801\u3002\n\n**7.2\u3001\u516c\u5171\u529f\u80fd\u7801**\n\nModbus\u4e2d\u516c\u5171\u529f\u80fd\u7801\u7684\u5b9a\u4e49\u5982\u4e0b\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220604291.png)\n\n**7.2.1\u3001\u7ebf\u5708\u64cd\u4f5c\u529f\u80fd\u7801\uff08bit\u4f4d\u7684\u64cd\u4f5c\uff09**\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220604188.png)\n\n\u6bd4\u5982\u6211\u8981\u8bfb\u53d6\u7ebf\u5708\u4e2d\u7684\u5185\u5bb9\u3002\u4ece\u673a\u5730\u5740\u4e3a 11H\uff0c\u7ebf\u5708\u5bc4\u5b58\u5668\u7684\u8d77\u59cb\u5730\u5740\u4e3a 0013H\uff0c\u7ed3\u675f\u5730\u5740\u4e3a 0037H\u3002\u9700\u8981\u67e5\u8be2\u603b\u5171 37 \u4e2a\u7ebf\u5708\u5bc4\u5b58\u5668\uff0c\u4e3b\u673a\u53d1\u9001\u7684RTU\u5e27\u5982\u4e0b\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220605694.png)\n\n\u4ece\u673a\u54cd\u5e94\u7684\u6570\u636e\u5e27\u5982\u4e0b\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220606376.png)\n\n\u89e3\u6790\uff1a\u7ebf\u5708 0013H \u5230\u7ebf\u5708 001AH \u7684\u72b6\u6001\u4e3a CDH\uff0c\u4e8c\u8fdb\u5236\u503c\u4e3a 11001101\uff0c\u8be5\u5b57\u8282\u7684\u6700\u9ad8\u5b57\u8282\u4e3a\u7ebf\u5708 001AH \uff0c \u6700 \u4f4e \u5b57 \u8282 \u4e3a \u7ebf \u5708 0013H \u3002\u5404\u7ebf\u5708\u72b6\u6001\u4e0e\u6570\u636e\u5185\u5bb9\u6bcf\u4f4d\u76f8\u5bf9\u5e94\u30021 \u4ee3\u8868 ON\uff0c0 \u4ee3\u8868 OFF\u3002\u7ebf \u5708 001AH \u5230 \u7ebf \u5708 0013H \u7684 \u72b6\u6001\u5206\u522b\u4e3a\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220606739.png)\n\n**7.2.2\u3001\u4fdd\u6301\u5bc4\u5b58\u5668\u64cd\u4f5c\u529f\u80fd\u7801**\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220607714.png)\n\n**\uff081\uff09\u5199\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668**\n\n\u5199\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u4f7f\u7528\u529f\u80fd\u780110H\u3002\u6bd4\u5982\uff1a\u4ece\u673a\u5730\u5740\u4e3a 11H\u3002\u4fdd\u6301\u5bc4\u5b58\u5668\u7684\u5176\u5b9e\u5730\u5740\u4e3a 0001H\uff0c\u5bc4\u5b58\u5668\u7684\u7ed3\u675f\u5730\u5740\u4e3a 0002H\u3002\u603b\u5171\u8bbf\u95ee 2\u4e2a\u5bc4\u5b58\u5668\u3002\u4fdd\u6301\u5bc4\u5b58\u5668 0001H \u7684\u5185\u5bb9\u4e3a 000AH\uff0c\u4fdd\u6301\u5bc4\u5b58\u5668 0002H \u7684\u5185\u5bb9\u4e3a 0102H\u3002\n\n\u4e3b\u673a\u8bf7\u6c42\u7684RTU\u5e27\u6570\u636e\u5982\u4e0b\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220608741.png)\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220609314.png)\n\n\u4ece\u673a\u8fd4\u56de\u7684\u54cd\u5e94\u4e3a\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220609758.png)\n\n**\uff082\uff09\u8bfb\u4fdd\u6301\u5bc4\u5b58\u5668**\n\n\u8bfb\u4fdd\u6301\u5bc4\u5b58\u5668\u4f7f\u752803H\u529f\u80fd\u7801\u3002\u6bd4\u5982\uff1a\u4ece\u673a\u5730\u5740\u4e3a 11H\u3002\u4fdd\u6301\u5bc4\u5b58\u5668\u7684\u8d77\u59cb\u5730\u5740\u4e3a 006BH\uff0c\u7ed3\u675f\u5730\u5740\u4e3a 006DH\u3002\n\n\u4e3b\u673a\u53d1\u9001\u7684RTU\u8bf7\u6c42\u5e27\u5982\u4e0b\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220610709.png)\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220610154.jpg)\n\n\u4ece\u673a\u7684\u5e94\u7b54\u5982\u4e0b\uff1a\n\n![\u56fe\u7247](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/10\/20231002220611727.png)\n\n---\n*modbus.cn*\n"