"# Modbus\u534f\u8bae\u5728TCP\/IP\u4e0a\u7684\u5b9e\u73b0\u6307\u5357\n\n> 2024-05-08 | 2026-06-30\n> https:\/\/www.modbus.cn\/en\/28048.html\n\n**Modbus \u534f\u8bae\u6807\u51c6**\n\n---\n\n\u5f15\u8a00\n\n## \u8303\u56f4\n\n\u8fd9\u4e2a\u6587\u4ef6\u7684\u8303\u56f4\u662f\u4ecb\u7ecdTCP\/IP\u4e0a\u7684MODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\uff0c\u63d0\u4f9b\u53c2\u8003\u4fe1\u606f\u4ee5\u5e2e\u52a9\u8f6f\u4ef6\u5f00\u53d1\u8005\u4f7f\u7528\u8fd9\u79cd\u670d\u52a1\u3002\u8fd9\u4e2a\u6587\u4e2d\u4e0d\u5305\u62ecMODBUS\u529f\u80fd\u7801\u7684\u7f16\u7801\u5185\u5bb9\uff0c\u8fd9\u4e9b\u4fe1\u606f\u8bf7\u53c2\u9605MODBUS\u534f\u8bae\u89c4\u8303[2]\u3002\n\n\u8fd9\u4e2a\u6587\u4ef6\u51c6\u786e\u800c\u5168\u9762\u5730\u63cf\u8ff0\u4e86MODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u7684\u5b9e\u73b0\u3002\u5176\u76ee\u7684\u662f\u4fbf\u4e8e\u5728\u90a3\u4e9b\u4f7f\u7528MODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u7684\u8bbe\u5907\u4e4b\u95f4\u8fdb\u884c\u53ef\u4e92\u64cd\u4f5c\u3002\n\n\u8fd9\u4e2a\u6587\u4ef6\u4e3b\u8981\u7531\u4e09\u90e8\u5206\u7ec4\u6210\uff1a\n\n- **\u5728TCP\/IP\u4e0a\u7684MODBUS\u534f\u8bae\u6982\u8ff0**\n\n- **MODBUS\u5ba2\u6237\u673a\u3001\u670d\u52a1\u5668\u548c\u7f51\u5173\u5de5\u5177\u7684\u529f\u80fd\u63cf\u8ff0**\n\n- **\u9488\u5bf9\u4e00\u4e2aMODBUS\u5b9e\u73b0\u5b9e\u4f8b\u7684\u76ee\u6807\u6a21\u578b\u5efa\u8bae\u7684\u5b9e\u73b0\u51c6\u5219\u3002**\n\n## \u5ba2\u6237\u673a\/\u670d\u52a1\u5668\u6a21\u578b\n\nMODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u63d0\u4f9b\u8bbe\u5907\u4e4b\u95f4\u7684\u5ba2\u6237\u673a\/\u670d\u52a1\u5668\u901a\u4fe1\uff0c\u8fd9\u4e9b\u8bbe\u5907\u8054\u63a5\u5728\u4e00\u4e2aEthernet\uff08\u4ee5\u592a\u7f51\uff09 TCP\/IP\u7f51\u7edc\u4e0a\u3002\n\n\u8fd9\u4e2a\u5ba2\u6237\u673a\/\u670d\u52a1\u5668\u6a21\u5f0f\u662f\u57fa\u4e8e4\u79cd\u7c7b\u578b\u62a5\u6587\uff1a\n\n- **MODBUS \u8bf7\u6c42**\n\n- **MODBUS \u8bc1\u5b9e**\n\n- **MODBUS \u6307\u793a**\n\n- **MODBUS \u54cd\u5e94**\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508215600378.png?x-oss-process=image\/resize,m_lfit,w_950,h_218)\n\nMODBUS\u8bf7\u6c42\u662f\u5ba2\u6237\u673a\u5728\u7f51\u7edc\u4e0a\u53d1\u9001\u7528\u6765\u542f\u52a8\u4e8b\u52a1\u5904\u7406\u7684\u62a5\u6587\n\nMODBUS\u6307\u793a\u662f\u670d\u52a1\u7aef\u63a5\u6536\u7684\u8bf7\u6c42\u62a5\u6587\n\nMODBUS\u54cd\u5e94\u662f\u670d\u52a1\u5668\u53d1\u9001\u7684\u54cd\u5e94\u4fe1\u606f\n\nMODBUS\u8bc1\u5b9e\u662f\u5728\u5ba2\u6237\u7aef\u63a5\u6536\u7684\u54cd\u5e94\u4fe1\u606f\n\nMODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\uff08\u5ba2\u6237\u673a\/\u670d\u52a1\u5668\u6a21\u578b\uff09\u7528\u4e8e\u5b9e\u65f6\u4fe1\u606f\u4ea4\u6362\uff1a\n\n- \u5728\u4e24\u4e2a\u8bbe\u5907\u5e94\u7528\u7a0b\u5e8f\u4e4b\u95f4\n\n- \u5728\u8bbe\u5907\u5e94\u7528\u548c\u5176\u5b83\u8bbe\u5907\u4e4b\u95f4\n\n- \u5728HMI\/SCADA\u5e94\u7528\u7a0b\u5e8f\u548c\u8bbe\u5907\u4e4b\u95f4\n\n- \u5728\u4e00\u4e2aPC\u548c\u4e00\u4e2a\u63d0\u4f9b\u5728\u7ebf\u670d\u52a1\u7684\u8bbe\u5907\u7a0b\u5e8f\u4e4b\u95f4\n\n## \u89c4\u8303\u6027\u5f15\u7528\u6587\u4ef6\n\n\u8fd9\u7ae0\u7ed9\u51fa\u4e86\u5728\u8fd9\u4e2a\u6587\u4ef6\u4e4b\u524d\u559c\u6b22\u9605\u8bfb\u7684\u6587\u4ef6\u5217\u8868\uff1a\n\n[2] **MODBUS\u534f\u8bae\u89c4\u8303**\n\n[4] **RFC1122**\n\n\u7f29\u7565\u8bed\n\n**ADU** -- \u5e94\u7528\u6570\u636e\u5355\u5143\n\n**IETF** -- \u56e0\u7279\u7f51\u5de5\u7a0b\u5de5\u4f5c\u7ec4\n\n**IP** -- \u4e92\u8fde\u7f51\u534f\u8bae\n\n**MAC** -- \u4ecb\u8d28\u8bbf\u95ee\u63a7\u5236\n\n**MB** -- MODBUS\n\n**MBAP** -- MODBUS\u534f\u8bae\n\n**PDU** -- \u534f\u8bae\u6570\u636e\u5355\u5143\n\n**PLC** -- \u53ef\u7f16\u7a0b\u5e8f\u903b\u8f91\u63a7\u5236\u5668\n\n**TCP** -- \u4f20\u8f93\u63a7\u5236\u534f\u8bae\n\n**BSD** -- \u4f2f\u514b\u5229\u8f6f\u4ef6\u5206\u914d\n\n**MSL** -- \u6700\u5927\u6bb5\u5bff\u547d\n\n\u80cc\u666f\u6982\u8981\n\n## \u534f\u8bae\u63cf\u8ff0\n\n### \u603b\u4f53\u901a\u4fe1\u7ed3\u6784\n\nMODBUS TCP\/IP\u7684\u901a\u4fe1\u7cfb\u7edf\u53ef\u4ee5\u5305\u62ec\u4e0d\u540c\u7c7b\u578b\u7684\u8bbe\u5907\uff1a\n\n- \u8fde\u63a5\u81f3TCP\/IP\u7f51\u7edc\u7684MODBUS TCP\/IP\u5ba2\u6237\u673a\u548c\u670d\u52a1\u5668\u8bbe\u5907\n\n- \u4e92\u8fde\u8bbe\u5907\uff0c\u4f8b\u5982\uff1a\u5728TCP\/IP\u7f51\u7edc\u548c\u4e32\u884c\u94fe\u8def\u5b50\u7f51\u4e4b\u95f4\u4e92\u8fde\u7684\u7f51\u6865\u3001\u8def\u7531\u5668\u6216\u7f51\u5173\uff0c\u8054\u63a5\uff0c\u8be5\u5b50\u7f51\u5141\u8bb8\u5c06MODBUS\u4e32\u884c\u94fe\u8def\u5ba2\u6237\u673a\u548c\u670d\u52a1\u5668\u7ec8\u7aef\u8bbe\u5907\u8fde\u63a5\u8d77\u6765\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508220108661.png?x-oss-process=image\/resize,m_lfit,w_950,h_463)\n\n\u56fe1\uff1aMODBUS TCP\/IP\u901a\u4fe1\u7ed3\u6784\n\nMODBUS\u534f\u8bae\u5b9a\u4e49\u4e86\u4e00\u4e2a\u4e0e\u57fa\u7840\u901a\u4fe1\u5c42\u65e0\u5173\u7684**\u7b80\u5355\u534f\u8bae\u6570\u636e\u5355\u5143\uff08PDU\uff09**\u3002\u7279\u5b9a\u603b\u7ebf\u6216\u7f51\u7edc\u4e0a\u7684MODBUS\u534f\u8bae\u6620\u5c04\u80fd\u591f\u5728**\u5e94\u7528\u6570\u636e\u5355\u5143\uff08ADU\uff09**\u4e0a\u5f15\u5165\u4e00\u4e9b\u9644\u52a0\u57df\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508211317493.png)\n\n\u56fe2\uff1a\u901a\u7528MODBUS\u5e27\n\n\u542f\u52a8MODBUS\u4e8b\u52a1\u5904\u7406\u7684\u5ba2\u6237\u673a\u5efa\u7acbMODBUS\u5e94\u7528\u6570\u636e\u5355\u5143\u3002\u8fd9\u4e2a\u529f\u80fd\u7801\u5411\u670d\u52a1\u5668\u6307\u793a\u6267\u884c\u6267\u884c\u54ea\u79cd\u64cd\u4f5c\u3002\n\n### TCP\/IP\u4e0a\u7684MODBUS\u5e94\u7528\u6570\u636e\u5355\u5143\n\n\u8fd9\u8282\u63cf\u8ff0\u4e86MODBUS TCP\/IP\u7f51\u7edc\u4e2d\u8fdb\u884c\u7684MODBUS\u8bf7\u6c42\u6216\u54cd\u5e94\u7684\u5c01\u88c5\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508220305907.png?x-oss-process=image\/resize,m_lfit,w_950,h_232)\n\n\u56fe3\uff1aTCP\/IP\u4e0a\u7684MODBUS\u7684\u8bf7\u6c42\/\u54cd\u5e94\n\n\u5728TCP\/IP\u4e0a\u4f7f\u7528\u4e00\u79cd\u4e13\u7528\u62a5\u6587\u5934\u8bc6\u522bMODBUS\u5e94\u7528\u6570\u636e\u5355\u5143\u3002\u5c06\u8fd9\u79cd\u62a5\u6587\u5934\u79f0\u4e3aMBAP\u62a5\u6587\u5934\uff08MODBUS\u534f\u8bae\u62a5\u6587\u5934\uff09\u3002\n\n\u8fd9\u79cd\u62a5\u6587\u5934\u63d0\u4f9b\u4e00\u4e9b\u4e0e\u4e32\u884c\u94fe\u8def\u4e0a\u4f7f\u7528\u7684MODBUS RTU\u5e94\u7528\u6570\u636e\u5355\u5143\u6bd4\u8f83\u7684\u5dee\u522b\uff1a\n\n- \u7528MBAP\u62a5\u6587\u5934\u4e2d\u7684\u5355\u4e2a\u5b57\u8282\u5355\u5143\u6807\u8bc6\u7b26\u53d6\u4ee3MODBUS\u4e32\u884c\u94fe\u8def\u4e0a\u901a\u5e38\u4f7f\u7528\u7684MODBUS\u4ece\u5730\u5740\u57df\u3002\u8fd9\u4e2a\u5355\u5143\u6807\u8bc6\u7b26\u7528\u4e8e\u8bbe\u5907\u7684\u901a\u4fe1\uff0c\u8fd9\u4e9b\u8bbe\u5907\u4f7f\u7528\u5355\u4e2aIP\u5730\u5740\u652f\u6301\u591a\u4e2a\u72ec\u7acbMODBUS\u7ec8\u7aef\u5355\u5143\uff0c\u4f8b\u5982\uff1a\u7f51\u6865\u3001\u8def\u7531\u5668\u548c\u7f51\u5173\u3002\n\n- \u7528\u63a5\u6536\u8005\u53ef\u4ee5\u9a8c\u8bc1\u5b8c\u6210\u62a5\u6587\u7684\u65b9\u5f0f\u8bbe\u8ba1\u6240\u6709MODBUS\u8bf7\u6c42\u548c\u54cd\u5e94\u3002\u5bf9\u4e8eMODBUS PDU\u6709\u56fa\u5b9a\u957f\u5ea6\u7684\u529f\u80fd\u7801\u6765\u8bf4\uff0c\u4ec5\u529f\u80fd\u7801\u5c31\u8db3\u591f\u4e86\u3002\u5bf9\u4e8e\u5728\u8bf7\u6c42\u6216\u54cd\u5e94\u4e2d\u643a\u5e26\u4e00\u4e2a\u53ef\u53d8\u6570\u636e\u7684\u529f\u80fd\u7801\u6765\u8bf4\uff0c\u6570\u636e\u57df\u5305\u62ec\u5b57\u8282\u6570\u3002\n\n- \u5f53\u5728TCP\u4e0a\u643a\u5e26MODBUS\u65f6\uff0c\u5373\u4f7f\u5c06\u62a5\u6587\u5206\u6210\u591a\u4e2a\u4fe1\u606f\u5305\u6765\u4f20\u8f93\uff0c\u529e\u4e8b\u5728MBAP\u62a5\u6587\u5934\u4e0a\u643a\u5e26\u9644\u52a0\u957f\u5ea6\u4fe1\u606f\uff0c\u4ee5\u4fbf\u63a5\u6536\u8005\u80fd\u8bc6\u522b\u62a5\u6587\u8fb9\u754c\u3002\u663e\u5f0f\u548c\u9690\u5f0f\u957f\u5ea6\u89c4\u5219\u7684\u5b58\u5728\u4ee5\u53caCRC-32\u5dee\u9519\u6821\u9a8c\u7801\u7684\u4f7f\u7528\uff08\u5728\u4ee5\u592a\u7f51\u4e0a\uff09\u5c06\u5bf9\u8bf7\u6c42\u6216\u54cd\u5e94\u62a5\u6587\u4ea7\u751f\u6781\u5c0f\u7684\u672a\u68c0\u51fa\u5e72\u6270\u3002\n\n### MBAP\u62a5\u6587\u5934\u63cf\u8ff0\n\nMBAP\u62a5\u6587\u5934\u5305\u62ec\u4e0b\u5217\u57df\uff1a\n\n\u57df\u957f\u5ea6\u63cf\u8ff0\u5ba2\u6237\u673a\u670d\u52a1\u5668\u4e8b\u52a1\u5143\u6807\u8bc6\u7b262\u4e2a\u5b57\u8282MODBUS\u8bf7\u6c42\/\u54cd\u5e94\u4e8b\u52a1\u5904\u7406\u7684\u8bc6\u522b\u7801\u5ba2\u6237\u673a\u542f\u52a8\u670d\u52a1\u5668\u4ece\u63a5\u6536\u7684\u8bf7\u6c42\u4e2d\u91cd\u65b0\u590d\u5236\u534f\u8bae\u6807\u8bc6\u7b262\u4e2a\u5b57\u82820=MODBUS\u534f\u8bae\u5ba2\u6237\u673a\u542f\u52a8\u670d\u52a1\u5668\u4ece\u63a5\u6536\u7684\u8bf7\u6c42\u4e2d\u91cd\u65b0\u590d\u5236\u957f\u5ea62\u4e2a\u5b57\u8282\u4ee5\u4e0b\u5b57\u8282\u7684\u6570\u91cf\u5ba2\u6237\u673a\u542f\u52a8\uff08\u8bf7\u6c42\uff09\u670d\u52a1\u5668\uff08\u54cd\u5e94\uff09\u542f\u52a8\u5355\u5143\u6807\u8bc6\u7b261\u4e2a\u5b57\u8282\u4e32\u884c\u94fe\u8def\u6216\u5176\u5b83\u603b\u7ebf\u4e0a\u8fde\u63a5\u7684\u8fdc\u7a0b\u4ece\u7ad9\u7684\u8bc6\u522b\u7801\u5ba2\u6237\u673a\u542f\u52a8\u670d\u52a1\u5668\u4ece\u63a5\u6536\u7684\u8bf7\u6c42\u4e2d\u91cd\u65b0\u590d\u5236\n\n\u62a5\u6587\u5934\u4e3a7\u4e2a\u5b57\u8282\u957f\uff1a\n\n\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26\uff1a\u7528\u4e8e\u4e8b\u52a1\u5904\u7406\u914d\u5bf9\u3002\u5728\u54cd\u5e94\u4e2d\uff0cMODBUS\u670d\u52a1\u5668\u590d\u5236\u8bf7\u6c42\u7684\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26\u3002\n\n\u534f\u8bae\u6807\u8bc6\u7b26\uff1a\u7528\u4e8e\u7cfb\u7edf\u5185\u7684\u591a\u8def\u590d\u7528\u3002\u901a\u8fc7\u503c0\u8bc6\u522bMODBUS\u534f\u8bae\u3002\n\n\u957f\u5ea6\uff1a\u957f\u5ea6\u57df\u662f\u4e0b\u4e00\u4e2a\u57df\u7684\u5b57\u8282\u6570\uff0c\u5305\u62ec\u5355\u5143\u6807\u8bc6\u7b26\u548c\u6570\u636e\u57df\u3002\n\n\u5355\u5143\u6807\u8bc6\u7b26\uff1a\u4e3a\u4e86\u7cfb\u7edf\u5185\u8def\u7531\uff0c\u4f7f\u7528\u8fd9\u4e2a\u57df\u3002\u4e13\u95e8\u7528\u4e8e\u901a\u8fc7\u4ee5\u592a\u7f51TCP-IP\u7f51\u7edc\u548cMODBUS\u4e32\u884c\u94fe\u8def\u4e4b\u95f4\u7684\u7f51\u5173\u5bf9MODBUS\u6216MODBUS+\u4e32\u884c\u94fe\u8def\u4ece\u7ad9\u7684\u901a\u4fe1\u3002MODBUS\u5ba2\u6237\u673a\u5728\u8bf7\u6c42\u4e2d\u8bbe\u7f6e\u8fd9\u4e2a\u57df\uff0c\u5728\u54cd\u5e94\u4e2d\u670d\u52a1\u5668\u5fc5\u987b\u5229\u7528\u76f8\u540c\u7684\u503c\u8fd4\u56de\u8fd9\u4e2a\u57df\u3002\n\n**\u5728\u6ce8\u518c\u7684502\u7aef\u53e3\u4e0a\u5229\u7528TCP\u53d1\u9001\u6240\u6709MODBUS\/TCP ADU\u3002**\n\n\u6ce8\uff1a\u7528Big-endian\u7f16\u7801\u4e0d\u540c\u57df\u3002\n\n## MODBUS\u529f\u80fd\u7801\u63cf\u8ff0\n\n\u5728MODBUS\u534f\u8bae\u89c4\u8303[2]\u4e2d\u8be6\u7ec6\u8bf4\u660e\u4e86MODBUS\u5e94\u7528\u5c42\u534f\u8bae\u4e0a\u4f7f\u7528\u7684\u6807\u51c6\u529f\u80fd\u7801\u3002\n\n\u529f\u80fd\u63cf\u8ff0\n\n\u8fd9\u91cc\u63d0\u4f9b\u7684MODBUS\u7ec4\u4ef6\u7ed3\u6784\u662f\u4e00\u4e2a\u65e2\u5305\u542bMODBUS\u5ba2\u6237\u673a\u53c8\u5305\u542bMODBUS\u670d\u52a1\u5668\u7ec4\u4ef6\u7684\u901a\u7528\u6a21\u578b\uff0c\u9002\u7528\u4e8e\u4efb\u4f55\u8bbe\u5907\u3002\n\n\u6709\u4e9b\u8bbe\u5907\u53ef\u80fd\u4ec5\u63d0\u4f9b\u670d\u52a1\u5668\u6216\u5ba2\u6237\u673a\u7ec4\u4ef6\u3002\n\n\u672c\u7ae0\u7684\u7b2c\u4e00\u90e8\u5206\uff0c\u7ed9\u51fa\u4e00\u4e2a\u6709\u5173MODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u7ec4\u4ef6\u7ed3\u6784\u7684\u7b80\u8981\u6982\u8ff0\uff0c\u7136\u540e\uff0c\u7ed9\u51fa\u7ed3\u6784\u6a21\u578b\u5185\u90e8\u6bcf\u4e00\u4e2a\u7ec4\u4ef6\u7684\u63cf\u8ff0\u3002\n\n**MODBUS\u7ec4\u4ef6\u7ed3\u6784\u6a21\u578b**\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508211432986.png)\n\n\u56fe4 MODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u6982\u5ff5\u7ed3\u6784\n\n- **\u901a\u4fe1\u5e94\u7528\u5c42**\n\n\u4e00\u4e2aMODBUS\u8bbe\u5907\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u5ba2\u6237\u673a\u548c\/\u6216\u670d\u52a1\u5668MODBUS\u63a5\u53e3\u3002\n\n\u53ef\u63d0\u4f9b\u4e00\u4e2aMODBUS\u540e\u53f0\u63a5\u53e3\uff0c\u5141\u8bb8\u95f4\u63a5\u7684\u8bbf\u95ee\u7528\u6237\u5e94\u7528\u5bf9\u8c61\u3002\n\n\u6b64\u63a5\u53e3\u7531\u56db\u90e8\u5206\u7ec4\u6210\uff1a\u79bb\u6563\u91cf\u8f93\u5165\u3001\u79bb\u6563\u91cf\u8f93\u51fa\uff08\u7ebf\u5708\uff09\u3001\u5bc4\u5b58\u5668\u8f93\u5165\u548c\u5bc4\u5b58\u5668\u8f93\u51fa\u3002\u6b64\u63a5\u53e3\u4e0e\u7528\u6237\u5e94\u7528\u6570\u636e\u4e4b\u95f4\u7684\u6620\u5c04\u5fc5\u987b\u52a0\u4ee5\u5b9a\u4e49\uff08\u672c\u5730\u95ee\u9898\uff09\u3002\n\n\u57fa\u672c\u6570\u636e\u8868\u5bf9\u8c61\u7c7b\u578b\u5c5e\u6027\u8bf4\u660e\u79bb\u6563\u91cf\u8f93\u51651\u4f4d\u53ea\u8bfb\u6b64\u7c7b\u6570\u636e\u53ef\u6765\u81eaI\/O\u7cfb\u7edf\u7ebf\u57081\u4f4d\u8bfb-\u5199\u6b64\u7c7b\u6570\u636e\u53ef\u88ab\u5e94\u7528\u7a0b\u5e8f\u4fee\u6539\u5bc4\u5b58\u5668\u8f93\u516516\u4f4d\u5b57\u53ea\u8bfb\u6b64\u7c7b\u6570\u636e\u53ef\u6765\u81eaI\/O\u7cfb\u7edf\u5bc4\u5b58\u5668\u8f93\u51fa16\u4f4d\u5b57\u53ea\u5199\u6b64\u7c7b\u6570\u636e\u53ef\u88ab\u5e94\u7528\u7a0b\u5e8f\u4fee\u6539\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508211501453.png?x-oss-process=image\/resize,m_lfit,w_950,h_473)\n\n- **MODBUS\u5ba2\u6237\u673a**\n\nMODBUS\u5ba2\u6237\u673a\u5141\u8bb8\u7528\u6237\u5e94\u7528\u6e05\u6670\u5730\u63a7\u5236\u4e0e\u8fdc\u7aef\u8bbe\u5907\u7684\u4fe1\u606f\u4ea4\u6362\u3002MODBUS\u5ba2\u6237\u673a\u6839\u636e\u7528\u6237\u5e94\u7528\u5411MODBUS\u5ba2\u6237\u63a5\u53e3\u53d1\u9001\u7684\u9700\u6c42\u4e2d\u6240\u5305\u542b\u7684\u53c2\u6570\u751f\u6210\u4e00\u4e2aMODBUS\u8bf7\u6c42\u3002\n\nMODBUS\u5ba2\u6237\u673a\u8c03\u7528\u4e00\u4e2aMODBUS\u7684\u4e8b\u52a1\u5904\u7406\uff0c\u4e8b\u52a1\u5904\u7406\u7ba1\u7406\u5305\u62ecMODBUS\u8bc1\u5b9e\u7684\u7b49\u5f85\u548c\u5904\u7406\u3002\n\n- **MODBUS\u5ba2\u6237\u673a\u63a5\u53e3**\n\nMODBUS\u5ba2\u6237\u673a\u63a5\u53e3\u63d0\u4f9b\u4e00\u4e2a\u63a5\u53e3\uff0c\u4f7f\u5f97\u7528\u6237\u5e94\u7528\u80fd\u591f\u751f\u6210\u5bf9\u5305\u62ec\u8bbf\u95eeMODBUS\u5e94\u7528\u5bf9\u8c61\u5728\u5185\u7684\u5404\u7c7bMODBUS\u670d\u52a1\u7684\u8bf7\u6c42\u3002\u5c3d\u7ba1\u5728\u5b9e\u73b0\u6a21\u578b\u4e2d\u4ee5\u5b9e\u4f8b\u8bf4\u660e\uff0c\u4f46\u662fMODBUS\u5ba2\u6237\u673a\u63a5\u53e3\uff08API\uff09\u5728\u8fd9\u91cc\u4e0d\u8fdb\u884c\u63cf\u8ff0\u3002\n\n- **MODBUS\u670d\u52a1\u5668**\n\n\u5728\u6536\u5230\u4e00\u4e2aMODBUS\u8bf7\u6c42\u4ee5\u540e\uff0c\u6a21\u5757\u6fc0\u6d3b\u4e00\u4e2a\u672c\u5730\u64cd\u4f5c\u8fdb\u884c\u8bfb\u3001\u5199\u3001\u6216\u5b8c\u6210\u5176\u4ed6\u64cd\u4f5c\u3002\u8fd9\u4e9b\u64cd\u4f5c\u7684\u5904\u7406\u5bf9\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u4eba\u5458\u6765\u8bf4\u90fd\u662f\u900f\u660e\u7684\u3002MODBUS\u670d\u52a1\u5668\u7684\u4e3b\u8981\u529f\u80fd\u662f\u7b49\u5f85\u6765\u81eaTCP502\u53e3\u7684MODBUS\u8bf7\u6c42\uff0c\u5904\u7406\u8fd9\u4e00\u8bf7\u6c42\uff0c\u7136\u540e\u751f\u6210\u4e00\u4e2aMODBUS\u5e94\u7b54\uff0c\u5e94\u7b54\u53d6\u51b3\u4e8e\u8bbe\u5907\u72b6\u51b5\uff08\u573a\u5883\uff09\u3002\n\n- **MODBUS\u540e\u53f0\u63a5\u53e3**\n\nMODBUS\u540e\u53f0\u63a5\u53e3\u662f\u4e00\u4e2a\u4eceMODBUS\u670d\u52a1\u5668\u5230\u5b9a\u4e49\u5e94\u7528\u5bf9\u8c61\u7684\u7528\u6237\u5e94\u7528\u4e4b\u95f4\u7684\u63a5\u53e3\u3002\n\n- **TCP\u7ba1\u7406\u5c42**\n\n\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u7684\u4e3b\u8981\u529f\u80fd\u4e4b\u4e00\u662f\u7ba1\u7406\u901a\u4fe1\u7684\u5efa\u7acb\u548c\u7ed3\u675f\uff0c\u7ba1\u7406\u5efa\u7acb\u5728TCP\u8fde\u63a5\u4e0a\u7684\u6570\u636e\u6d41\u3002\n\n- **\u8fde\u63a5\u7ba1\u7406**\n\n\u5728\u5ba2\u6237\u673a\u548c\u670d\u52a1\u5668\u7684MODBUS\u6a21\u5757\u4e4b\u95f4\u7684\u901a\u4fe1\u9700\u8981\u8c03\u7528TCP\u8fde\u63a5\u7ba1\u7406\u6a21\u5757\u3002\u5b83\u8d1f\u8d23\u5168\u9762\u7ba1\u7406\u62a5\u6587\u4f20\u8f93TCP\u8fde\u63a5\u3002\n\n\u8fde\u63a5\u7ba1\u7406\u4e2d\u5b58\u5728\u4e24\u79cd\u53ef\u80fd\uff1a\u7528\u6237\u5e94\u7528\u81ea\u8eab\u7ba1\u7406TCP\u8fde\u63a5\uff0c\u6216\u5168\u90e8\u7531\u8fd9\u4e2a\u6a21\u5757\u8fdb\u884c\u8fde\u63a5\u7ba1\u7406\uff0c\u800c\u5bf9\u7528\u6237\u5e94\u7528\u900f\u660e\u3002\u540e\u4e00\u79cd\u65b9\u6848\u7075\u6d3b\u6027\u8f83\u5dee\u3002\n\nTCP 502\u53e3\u7684\u4fa6\u542c\u662f\u4e3aMODBUS\u901a\u4fe1\u4fdd\u7559\u7684\u3002\u5728\u7f3a\u7701\u72b6\u6001\u4e0b\uff0c\u5f3a\u5236\u4fa6\u542c\u8fd9\u4e2a\u53e3\u3002\u7136\u800c\uff0c\u6709\u4e9b\u5e02\u573a\u6216\u5e94\u7528\u53ef\u80fd\u9700\u8981\u5176\u4ed6\u53e3\u4f5c\u4e3aTCP\u4e0aMODBUS\u7684\u901a\u4fe1\u4e4b\u7528\u3002\u5f53\u9700\u8981\u4e0e\u975e\u65bd\u5948\u5fb7\uff08Schneider\uff09\u4ea7\u54c1\u8fdb\u884c\u4e92\u64cd\u4f5c\u65f6\uff0c\u5c31\u5c5e\u4e8e\u8fd9\u79cd\u60c5\u51b5\uff0c\u4f8b\u5982\uff1a\u5728\u5efa\u7b51\u63a7\u5236\u4e2d\u3002\u4e3a\u6b64\uff0c\u5f3a\u70c8\u5efa\u8bae\uff1a\u5ba2\u6237\u673a\u548c\u670d\u52a1\u5668\u5747\u5e94\u5411\u7528\u6237\u63d0\u4f9b\u5bf9TCP\u53e3\u53f7\u4e0a\u7684MODBUS\u53c2\u6570\u8fdb\u884c\u914d\u7f6e\u7684\u53ef\u80fd\u6027\u3002\u91cd\u8981\u7684\u662f\uff1a\u5373\u4f7f\u5728\u67d0\u4e00\u4e2a\u7279\u5b9a\u7684\u5e94\u7528\u4e2d\u4e3aMODBUS\u670d\u52a1\u914d\u7f6e\u4e86\u5176\u4ed6TCP\u670d\u52a1\u5668\u53e3\uff0c\u9664\u4e00\u4e9b\u7279\u5b9a\u5e94\u7528\u53e3\u5916\uff0cTCP\u670d\u52a1\u5668502\u53e3\u5fc5\u987b\u4ecd\u7136\u662f\u53ef\u7528\u7684\u3002\n\n- **\u8bbf\u95ee\u63a7\u5236\u6a21\u5757**\n\n\u5728\u67d0\u4e9b\u81f3\u5173\u91cd\u8981\u7684\u573a\u5408\uff0c\u5fc5\u987b\u7981\u6b62\u4e0d\u9700\u8981\u7684\u4e3b\u673a\u5bf9\u8bbe\u5907\u5185\u90e8\u6570\u636e\u7684\u8bbf\u95ee\u3002\u8fd9\u65e2\u662f\u4e3a\u4ec0\u4e48\u9700\u8981\u5b89\u5168\u6a21\u5f0f\uff0c\u4e5f\u662f\u5728\u9700\u8981\u65f6\u5b9e\u73b0\u5b89\u5168\u5904\u7406\u7684\u539f\u56e0\u3002\n\n- **TCP\/IP\u6808\u5c42**\n\nTCP\/IP\u7684\u6808\u53ef\u4ee5\u8fdb\u884c\u53c2\u6570\u914d\u7f6e\uff0c\u4ee5\u4fbf\u4e8e\u4f7f\u5f97\u6570\u636e\u6d41\u63a7\u5236\u3001\u5730\u5740\u7ba1\u7406\u548c\u8fde\u63a5\u7ba1\u7406\u9002\u5e94\u4e8e\u7279\u5b9a\u7684\u4ea7\u54c1\u6216\u7cfb\u7edf\u7684\u4e0d\u540c\u7684\u7ea6\u675f\u3002\u4e00\u822c\u8bf4\u6765\uff0cBSD\u5957\u63a5\u5b57\u63a5\u53e3\u5c31\u7528\u6765\u7ba1\u7406TCP\u8fde\u63a5\u3002\n\n- **\u8d44\u6e90\u7ba1\u7406\u548c\u6570\u636e\u6d41\u63a7\u5236**\n\n\u4e3a\u4e86\u5e73\u8861MODBUS\u5ba2\u6237\u673a\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u8fdb\u51fa\u62a5\u6587\u4f20\u8f93\u7684\u6570\u636e\u6d41\uff0c\u5728MODBUS\u62a5\u6587\u4f20\u8f93\u6808\u7684\u6240\u6709\u5404\u5c42\u5747\u8bbe\u7f6e\u4e86\u6570\u636e\u6d41\u63a7\u5236\u673a\u5236\u3002\u8d44\u6e90\u7ba1\u7406\u548c\u6570\u636e\u6d41\u63a7\u5236\u6a21\u5757\u9996\u5148\u662f\u57fa\u4e8eTCP\u5185\u90e8\u6570\u636e\u6d41\u63a7\u5236\uff0c\u9644\u52a0\u6570\u636e\u94fe\u8def\u5c42\u7684\u67d0\u4e9b\u6570\u636e\u6d41\u63a7\u5236\uff0c\u4ee5\u53ca\u7528\u6237\u5e94\u7528\u5c42\u7684\u6570\u636e\u6d41\u63a7\u5236\u3002\n\n## TCP\u8fde\u63a5\u7ba1\u7406\n\n### \u8fde\u63a5\u7ba1\u7406\u6a21\u5757\n\n#### 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\u6240\u6253\u5f00\u7684\u8fde\u63a5\u4e0e\u670d\u52a1\u5668\u4fa7\u534a\u6253\u5f00\u7684\u8fde\u63a5\u5177\u6709\u4e0d\u540c\u7684\u7279\u6027\uff08\u4e0d\u540c\u7684\u6e90\u53e3\u548c\u76f8\u540c\u7684\u76ee\u7684\u53e3\u3001\u76f8\u540c\u7684\u6e90\u548c\u76ee\u7684IP\u5730\u5740\uff09\uff0c\u6240\u4ee5\uff0c\u5728TCP\u6808\u5c42\u4e0a\u6253\u5f00\u8fde\u63a5\uff0c\u5e76\u5411\u670d\u52a1\u5668\u4fa7\u7684TCP\u7ba1\u7406\u5c42\u53d1\u9001\u4fe1\u53f7\u3002\n\n\u5982\u679c\u670d\u52a1\u5668\u4fa7TCP\u7ba1\u7406\u5c42\u4ec5\u652f\u6301\u4e00\u4e2a\u8fdc\u7aef\u5ba2\u6237\u673aIP\u5730\u5740\u7684\u8fde\u63a5\uff0c\u90a3\u4e48\u53ef\u4ee5\u5173\u95ed\u539f\u6765\u7684\u534a\u6253\u5f00\u7684\u8fde\u63a5\uff0c\u4f7f\u7528\u65b0\u7684\u8fde\u63a5\u3002\n\n\u5982\u679c\u670d\u52a1\u5668\u4fa7TCP\u7ba1\u7406\u5c42\u652f\u6301\u591a\u4e2a\u8fdc\u7aef\u5ba2\u6237\u673aIP\u5730\u5740\u7684\u8fde\u63a5\uff0c\u90a3\u4e48\u65b0\u7684\u8fde\u63a5\u4fdd\u6301\u6253\u5f00\u72b6\u6001\uff0c\u539f\u6765\u7684\u8fde\u63a5\u4e5f\u4fdd\u6301\u534a\u6253\u5f00\u72b6\u6001\uff0c\u76f4\u5230\u201c\u4fdd\u6301\u8fde\u63a5\u201d\u8ba1\u65f6\u5668\u8ba1\u65f6\u7ed3\u675f\uff0c\u6b64\u65f6\uff0c\u5c06\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u5230TCP\u7ba1\u7406\u5c42\u3002\u4e4b\u540e\uff0cTCP\u7ba1\u7406\u5c42\u5c06\u80fd\u591f\u590d\u4f4d\u539f\u6709\u7684\u8fde\u63a5\u3002\n\n### \u8bbf\u95ee\u63a7\u5236\u6a21\u5757\n\n\u8fd9\u4e2a\u6a21\u5757\u7684\u76ee\u7684\u662f\u68c0\u67e5\u6bcf\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5\uff0c\u5bf9\u7167\u4e00\u4e2a\u5408\u6cd5\u6388\u6743\u7684\u8fdc\u7a0bIP\u5730\u5740\u5217\u8868\uff0c\u5b83\u53ef\u4ee5\u6388\u6743\u6216\u7981\u6b62\u4e00\u4e2a\u8fdc\u7aef\u5ba2\u6237\u673a\u7684TCP\u8fde\u63a5\u3002\n\n\u5728\u81f3\u5173\u91cd\u8981\u7684\u573a\u5408\uff0c\u5e94\u7528\u5f00\u53d1\u4eba\u5458\u9700\u8981\u9009\u62e9\u8bbf\u95ee\u63a7\u5236\u6a21\u5757\u6765\u4fdd\u8bc1\u7f51\u7edc\u7684\u8bbf\u95ee\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u5bf9\u6bcf\u4e2a\u8fdc\u7aefIP\u6388\u6743\u6216\u7981\u6b62\u8bbf\u95ee\u3002\u7528\u6237\u9700\u63d0\u4f9b\u4e00\u4e2aIP\u5730\u5740\u7684\u5217\u8868\uff0c\u5e76\u7279\u522b\u6ce8\u660e\u6bcf\u4e2aIP\u5730\u5740\u662f\u5426\u5408\u6cd5\u6388\u6743\u3002\u5728\u7f3a\u7701\u60c5\u51b5\u4e0b\uff0c\u5728\u5b89\u5168\u6a21\u5f0f\u4e2d\uff0c\u7528\u6237\u672a\u914d\u7f6e\u7684IP\u5730\u5740\u5747\u88ab\u7981\u6b62\u3002\u6240\u4ee5\uff0c\u501f\u52a9\u4e8e\u8bbf\u95ee\u63a7\u5236\u6a21\u5f0f\uff0c\u5173\u95ed\u6765\u81ea\u672a\u77e5\u7684IP\u5730\u5740\u7684\u8bbf\u95ee\u8fde\u63a5\u3002\n\n## TCP\/IP\u6808\u7684\u4f7f\u7528\n\nTCP\/IP\u6808\u63d0\u4f9b\u4e86\u4e00\u4e2a\u63a5\u53e3\uff0c\u7528\u6765\u7ba1\u7406\u8fde\u63a5\u3001\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\uff0c\u8fd8\u53ef\u4ee5\u8fdb\u884c\u53c2\u6570\u914d\u7f6e\uff0c\u4ee5\u4f7f\u5f97\u6808\u7684\u7279\u6027\u9002\u5e94\u4e8e\u8bbe\u5907\u6216\u7cfb\u7edf\u7684\u9650\u5236\u3002\n\n\u672c\u7ae0\u7684\u76ee\u7684\u662f\u7ed9\u51fa\u6709\u5173\u6808\u63a5\u53e3\u7684\u7efc\u8ff0\uff0c\u4ee5\u53ca\u4e00\u4e9b\u4e0e\u6808\u7684\u53c2\u6570\u914d\u7f6e\u6709\u5173\u7684\u4fe1\u606f\u3002\u603b\u63fd\u7efc\u8ff0\u4e3b\u8981\u662fMODBUS\u62a5\u6587\u4f20\u8f93\u6240\u4f7f\u7528\u7684\u4e00\u4e9b\u7279\u6027\u3002\n\n\u5bf9\u4e8e\u66f4\u591a\u7684\u4fe1\u606f\uff0c\u5efa\u8bae\u9605\u8bfbRFC 1122\uff0c\u8fd9\u4e2aRFC 1122\u4e3a\u5382\u5546\u548c\u5f00\u53d1\u5546\u63d0\u4f9b\u4e86\u4e92\u8054\u7f51\u901a\u4fe1\u8f6f\u4ef6\u7684\u6307\u5357\u3002RFC 1122\u8be6\u8ff0\u4e86\u4e00\u4e2a\u8fde\u63a5\u5230\u4e92\u8054\u7f51\u7684\u4e3b\u673a\u5fc5\u987b\u91c7\u7528\u7684\u6807\u51c6\u534f\u8bae\uff0c\u4ee5\u53ca\u4e00\u7ec4\u660e\u786e\u7684\u9700\u6c42\u548c\u9009\u9879\u3002\n\n\u6808\u63a5\u53e3\u4e00\u822c\u662f\u57fa\u4e8e\u672c\u6587\u4ef6\u4e2d\u63cf\u8ff0\u7684BSD\uff08\u4f2f\u514b\u5229\u8f6f\u4ef6\u5206\u914d\u4ee3\u7801\uff09\u63a5\u53e3\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508211654827.png)\n\n### BSD\u5957\u63a5\u5b57\u63a5\u53e3\u7684\u5e94\u7528\n\n\u6ce8\uff1a\u6709\u4e9bTCP\/IP\u6808\u4ece\u6027\u80fd\u8003\u8651\u63d0\u51fa\u5176\u4ed6\u7c7b\u578b\u7684\u63a5\u53e3\u3002MODBUS\u5ba2\u6237\u673a\u6216\u670d\u52a1\u5668\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u7279\u5b9a\u7684\u63a5\u53e3\uff0c\u4f46\u662f\u5728\u672c\u6587\u4ef6\u4e2d\u5bf9\u8fd9\u79cd\u4f7f\u7528\u4e0d\u505a\u63cf\u8ff0\u3002\n\n\u4e00\u4e2a\u5957\u63a5\u5b57\u662f\u4e00\u4e2a\u901a\u4fe1\u7aef\u70b9\uff0c\u5b83\u662f\u901a\u4fe1\u4e2d\u7684\u57fa\u672c\u6784\u6210\u5757\u3002\u901a\u8fc7\u5957\u63a5\u5b57\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u53ef\u4ee5\u6267\u884c\u4e00\u4e2aMODBUS\u901a\u4fe1\u3002TCO\/IP\u5e93\u4ec5\u63d0\u4f9b\u4e86\u4f7f\u7528TCP\u548c\u63d0\u4f9b\u57fa\u4e8e\u8fde\u63a5\u7684\u901a\u4fe1\u670d\u52a1\u7684\u6d41\u5957\u63a5\u5b57\u3002\n\nsocket()\u51fd\u6570\u7528\u6765\u521b\u5efa\u5957\u63a5\u5b57\u3002\u8fd4\u56de\u7684\u4e00\u4e2a\u5957\u63a5\u5b57\u53f7\u88ab\u521b\u5efa\u8005\u7528\u6765\u8bbf\u95ee\u5957\u63a5\u5b57\u3002\u5957\u63a5\u5b57\u521b\u5efa\u65f6\u6ca1\u6709\u5730\u5740\uff08IP\u5730\u5740\u548c\u53e3\u53f7\uff09\u3002\u76f4\u5230\u4e00\u4e2a\u53e3\u88ab\u7ed1\u5b9a\u5230\u8be5\u5957\u63a5\u5b57\u65f6\uff0c\u65b9\u53ef\u63a5\u6536\u6570\u636e\u3002\n\nbind()\u51fd\u6570\u7528\u6765\u7ed1\u5b9a\u4e00\u4e2a\u53e3\u53f7\u5230\u5957\u63a5\u5b57\u3002bind()\u51fd\u6570\u5728\u5957\u63a5\u5b57\u4e0e\u6240\u6307\u5b9a\u7684\u53e3\u53f7\u4e4b\u95f4\u5efa\u7acb\u4e00\u4e2a\u8fde\u63a5\u3002\n\n\u4e3a\u4e86\u521d\u59cb\u5316\u4e00\u4e2a\u8fde\u63a5\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u53d1\u9001connect()\u51fd\u6570\u6765\u6307\u5b9a\u5957\u63a5\u5b57\u53f7\u3001\u8fdc\u7aefIP\u5730\u5740\u548c\u8fdc\u7aef\u4fa6\u542c\u53e3\u53f7\uff08\u4e3b\u52a8\u8fde\u63a5\u5efa\u7acb\uff09\u3002\n\n\u4e3a\u4e86\u5b8c\u6210\u8fde\u63a5\uff0c\u670d\u52a1\u5668\u7aef\u5fc5\u987b\u53d1\u9001accept()\u51fd\u6570\u6307\u5b9a\u4ee5\u524d\u5728listen()\u8c03\u7528\u4e2d\u6240\u6307\u5b9a\u7684\u5957\u63a5\u5b57\u53f7\uff08\u88ab\u52a8\u8fde\u63a5\u5efa\u7acb\uff09\u3002\u4e00\u4e2a\u65b0\u7684\u5957\u63a5\u5b57\u88ab\u521b\u5efa\uff0c\u5e76\u5177\u6709\u4e0e\u6700\u521d\u76f8\u540c\u7684\u7279\u6027\u3002\u8fd9\u4e2a\u65b0\u7684\u5957\u63a5\u5b57\u8fde\u63a5\u5230\u5ba2\u6237\u673a\u7684\u5957\u63a5\u5b57\uff0c\u800c\u5c06\u5957\u63a5\u5b57\u53f7\u8fd4\u56de\u5230\u670d\u52a1\u5668\u7aef\u3002\u4e8e\u662f\uff0c\u91ca\u653e\u521d\u59cb\u5957\u63a5\u5b57\uff0c\u4ee5\u4fbf\u4e3a\u5176\u4ed6\u6b32\u4e0e\u670d\u52a1\u5668\u8fde\u63a5\u7684\u5ba2\u6237\u673a\u4f7f\u7528\u3002\n\n\u5728TCP\u8fde\u63a5\u5efa\u7acb\u4ee5\u540e\uff0c\u6570\u636e\u5373\u53ef\u88ab\u4f20\u9012\u3002\u5c06Send()\u548crecv()\u51fd\u6570\u4e13\u95e8\u5730\u8bbe\u8ba1\u6210\u4e0e\u5df2\u7ecf\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u4e00\u9053\u4f7f\u7528\u3002\n\nsetsockopt()\u51fd\u6570\u5141\u8bb8\u5957\u63a5\u5b57\u7684\u521b\u5efa\u8005\u7528\u5957\u63a5\u5b57\u5efa\u7acb\u82e5\u5e72\u9009\u9879\u3002\u8fd9\u4e9b\u9009\u9879\u63cf\u8ff0\u4e86\u5957\u63a5\u5b57\u7684\u64cd\u4f5c\u7279\u5f81\u3002\n\nselect()\u51fd\u6570\u5141\u8bb8\u7f16\u7a0b\u4eba\u5458\u6d4b\u8bd5\u6240\u6709\u5957\u63a5\u5b57\u4e0a\u7684\u4e8b\u4ef6\u3002\n\nshutdown()\u51fd\u6570\u5141\u8bb8\u5957\u63a5\u5b57\u7684\u4f7f\u7528\u8005\u6765\u7ec8\u6b62send()\u548c\/\u6216recv()\u3002\n\n\u4e00\u65e6\u4e0d\u518d\u9700\u8981\u5957\u63a5\u5b57\uff0c\u53ef\u4ee5\u4f7f\u7528close()\u51fd\u6570\u6765\u653e\u5f03\u5957\u63a5\u5b57\u7684\u63cf\u8ff0\u4fe1\u606f\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508211725797.png)\n\n\u56fe9\uff1aMODBUS\u4fe1\u606f\u4ea4\u6362\n\n\u4e0a\u56fe\u7ed9\u51fa\u4e86\u5ba2\u6237\u673a\u4e0e\u670d\u52a1\u5668\u95f4\u7684\u5b8c\u6574\u7684MODBUS\u901a\u4fe1\u8fc7\u7a0b\u3002\u5ba2\u6237\u673a\u5efa\u7acb\u4e00\u4e2a\u8fde\u63a5\uff0c\u5411\u670d\u52a1\u5668\u53d1\u90013\u4e2aMODBUS\u8bf7\u6c42\uff0c\u800c\u4e0d\u7b49\u5f85\u7b2c\u4e00\u4e2a\u8bf7\u6c42\u7684\u5e94\u7b54\u5230\u6765\u3002\u5728\u6536\u5230\u6240\u6709\u7684\u5e94\u7b54\u540e\uff0c\u5ba2\u6237\u673a\u6b63\u5e38\u5730\u5173\u95ed\u8fde\u63a5\u3002\n\n### TCP\u5c42\u53c2\u6570\u914d\u7f6e\n\n\u53ef\u4ee5\u8c03\u6574TCP\/IP\u6808\u7684\u4e00\u4e9b\u53c2\u6570\u4ee5\u4f7f\u5f97\u5176\u7279\u6027\u6ee1\u8db3\u4ea7\u54c1\u6216\u7cfb\u7edf\u7684\u9650\u5236\u3002TCP\u5c42\u7684\u4e0b\u5217\u53c2\u6570\u53ef\u4ee5\u8fdb\u884c\u8c03\u6574\uff1a\n\n- **\u6bcf\u4e2a\u8fde\u63a5\u7684\u53c2\u6570**\n\nSO-RCVBUF, SO-SNDBUF:\n\n\u8fd9\u4e9b\u53c2\u6570\u5141\u8bb8\u4e3a\u53d1\u9001\u548c\u63a5\u6536\u7528\u5957\u63a5\u5b57\u63a5\u53e3\u8bbe\u5b9a\u9ad8\u9650\u4f4d\u3002\u53ef\u4ee5\u901a\u8fc7\u8c03\u6574\u8fd9\u4e9b\u53c2\u6570\u6765\u5b9e\u73b0\u6d41\u91cf\u63a7\u5236\u7ba1\u7406\u3002\u63a5\u6536\u7f13\u5b58\u533a\u7684\u7684\u5927\u5c0f\u5373\u4e3a\u6bcf\u4e2a\u8fde\u63a5advertised window\u7684\u6700\u5927\u503c\u3002\u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u5fc5\u987b\u589e\u52a0\u5957\u63a5\u5b57\u7f13\u5b58\u533a\u7684\u5927\u5c0f\u3002\u5426\u5219\uff0c\u8fd9\u4e9b\u503c\u5fc5\u987b\u5c0f\u4e8e\u5185\u90e8\u9a71\u52a8\u5668\u7684\u8d44\u6e90\uff0c\u4ee5\u4fbf\u5728\u5185\u90e8\u9a71\u52a8\u5668\u7684\u8d44\u6e90\u8017\u5c3d\u4e4b\u524d\u5173\u95edTCP\u7a97\u53e3\u3002\n\n\u63a5\u6536\u7f13\u5b58\u533a\u5927\u5c0f\u53d6\u51b3\u4e8eTCP\u7a97\u53e3\u5927\u5c0f\u3001TCP\u6700\u5927\u6bb5\u7684\u5927\u5c0f\u548c\u63a5\u6536\u8f93\u5165\u5e27\u6240\u9700\u7684\u65f6\u95f4\u3002\u7531\u4e8e\u6700\u5927\u6bb5\u7684\u5c3a\u5bf8\u4e3a300\u4e2a\u5b57\uff08\u4e00\u4e2aMODBUS\u8bf7\u6c42\u9700\u8981\u6700\u5927256\u5b57+MBAP\u62a5\u6587\u5934\uff09,\u5982\u679c\u9700\u89813\u5e27\u8fdb\u884c\u7f13\u5b58\uff0c\u53ef\u5c06\u5957\u63a5\u5b57\u7f13\u5b58\u533a\u5927\u5c0f\u8c03\u6574\u4e3a900\u5b57\u3002\u4e3a\u4e86\u6ee1\u8db3\u6700\u5927\u7684\u7f13\u5b58\u9700\u6c42\u548c\u9884\u5b9a\u7684\u65f6\u95f4\uff0c\u53ef\u4ee5\u589e\u52a0TCP\u7a97\u53e3\u7684\u5927\u5c0f\u3002\n\nTCP-NODELAY:\n\n\u901a\u5e38\uff0c\u5c0f\u62a5\u6587\uff08\u79f0\u4e3a\uff1atinygrams\uff09\u5728\u5c40\u57df\u7f51\uff08LAN\uff09\u4e0a\u7684\u4f20\u8f93\u4e0d\u4f1a\u4ea7\u751f\u95ee\u9898\uff0c\u56e0\u4e3a\u591a\u6570\u5c40\u57df\u7f51\u662f\u4e0d\u62e5\u5835\u7684\uff0c\u4f46\u662f\uff0c\u8fd9\u4e9btinygrams\u5728\u5e7f\u57df\u7f51\u4e0a\u5c06\u4f1a\u9020\u6210\u62e5\u5835\u3002\u4e00\u4e2a\u79f0\u4e3a\u201cNAGLE\u7b97\u6cd5\u201d\u7684\u7b80\u5355\u65b9\u6848\u662f\uff1a\u6536\u96c6\u5c0f\u91cf\u7684\u6570\u636e\uff0c\u5f53\u524d\u9762\u62a5\u6587\u7684TCP\u786e\u8ba4\u5230\u8fbe\u65f6\u518d\u7528\u5355\u4e2a\u8fdb\u884c\u53d1\u9001\u3002\n\n\u4e3a\u4e86\u83b7\u5f97\u66f4\u597d\u7684\u5b9e\u65f6\u7279\u6027\uff0c\u5efa\u8bae\uff1a\u5c06\u5c0f\u91cf\u7684\u6570\u636e\u76f4\u63a5\u53d1\u9001\uff0c\u800c\u4e0d\u8981\u8bd5\u56fe\u5c06\u5176\u6536\u96c6\u5230\u4e00\u4e2a\u6bb5\u5185\u518d\u53d1\u9001\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5efa\u8bae\u5f3a\u5236TCP-NODELAY\u9009\u9879\uff0c\u8fd9\u4e2a\u9009\u9879\u7981\u7528\u5ba2\u6237\u673a\u548c\u670d\u52a1\u5668\u8fde\u63a5\u7684\u201cNAGLE\u7b97\u6cd5\u201d\u3002\n\nSO-REUSEADDR:\n\n\u5f53MODBUS\u670d\u52a1\u5668\u5173\u95ed\u4e00\u4e2a\u7531\u8fdc\u7aef\u5ba2\u6237\u542f\u52a8\u7684TCP\u8fde\u63a5\u65f6\uff0c\u5728\u8fd9\u4e2a\u8fde\u63a5\u5904\u4e8e\u201c\u65f6\u95f4\u7b49\u5f85\u201d\u72b6\u6001\uff08\u4e24\u4e2aMSL\uff1a\u6700\u5927\u6bb5\u5bff\u547d\uff09\u7684\u8fc7\u7a0b\u4e2d\uff0c\u8be5\u8fde\u63a5\u6240\u7528\u7684\u672c\u5730\u53e3\u53f7\u4e0d\u80fd\u88ab\u518d\u6b21\u7528\u6765\u6253\u5f00\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5\u3002\n\n\u5efa\u8bae\uff1a\u4e3a\u6bcf\u4e2a\u5ba2\u6237\u673a\u548c\u670d\u52a1\u5668\u8fde\u63a5\uff0c\u6307\u660eSO-REUSEADDR\u9009\u9879\uff0c\u4ee5\u8fc2\u56de\u8fd9\u4e2a\u9650\u5236\u3002\u6b64\u9009\u9879\u5141\u8bb8\u4e3a\u81ea\u8eab\u5206\u914d\u4e00\u4e2a\u53e3\u53f7\uff0c\u5b83\u4f5c\u4e3a\u8fde\u63a5\u7684\u4e00\u90e8\u5206\u57282MSL\u671f\u95f4\u5185\u7b49\u5f85\u5ba2\u6237\u673a\u5e76\u4fa6\u542c\u5957\u63a5\u5b57\u63a5\u53e3\u3002\n\nSO-KEEPALIVE:\n\nTCP\/IP\u534f\u8bae\u7f3a\u7701\u72b6\u6001\u4e0b\uff0c\u4e0d\u901a\u8fc7\u7a7a\u95f2\u7684TCP\u8fde\u63a5\u53d1\u9001\u6570\u636e\u3002\u56e0\u6b64\uff0c\u5982\u679c\u5728TCP\u8fde\u63a5\u7aef\u8fd9\u4e2a\u8fc7\u7a0b\u6ca1\u6709\u53d1\u9001\u6570\u636e\uff0c\u5728\u4e24\u4e2aTCP\u6a21\u5757\u95f4\u5c31\u6ca1\u6709\u4ea4\u6362\u4efb\u4f55\u6570\u636e\u3002\u8fd9\u5c31\u5047\u8bbe\u5ba2\u6237\u673a\u7aef\u5e94\u7528\u548c\u670d\u52a1\u5668\u7aef\u5e94\u7528\u5747\u91c7\u7528\u8ba1\u6570\u5668\u6765\u63a2\u6d4b\u8fde\u63a5\u7684\u5b58\u6d3b\u6027\uff0c\u4ee5\u4fbf\u5173\u95ed\u8fde\u63a5\u3002\n\n\u5efa\u8bae\uff1a\u5728\u5ba2\u6237\u673a\u4e0e\u670d\u52a1\u5668\u8fde\u63a5\u4e24\u7aef\u5747\u91c7\u7528KEEPALIVE\u9009\u9879\uff0c\u4ee5\u4fbf\u67e5\u8be2\u53e6\u4e00\u7aef\u5f97\u77e5\u5bf9\u65b9\u662f\u5426\u6545\u969c\u5e76\u6b7b\u673a\uff0c\u6216\u6545\u969c\u5e76\u91cd\u65b0\u542f\u52a8\u3002\n\n\u7136\u800c\uff0c\u6211\u4eec\u5fc5\u987b\u7262\u8bb0\uff0c\u91c7\u7528KEEPALIVE\u53ef\u80fd\u5f15\u8d77\u4e00\u4e2a\u975e\u5e38\u826f\u597d\u7684\u8fde\u63a5\uff0c\u5728\u77ac\u95f4\u6545\u969c\u65f6\u901a\u4fe1\u4e2d\u65ad\uff0c\u5982\u679c\u4fdd\u6301\u8fde\u63a5\u8ba1\u65f6\u5668\u8ba1\u65f6\u5468\u671f\u592a\u77ed\uff0c\u5c06\u5360\u7528\u4e0d\u5fc5\u8981\u7684\u7f51\u7edc\u5e26\u5bbd\u3002\n\n- 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**Jacobson RTO\u4f30\u8ba1\u7b97\u6cd5**\u7528\u6765\u4f30\u8ba1\u91cd\u53d1\u8d85\u65f6(RTO)\uff1b\n\n- **Karn\u7b97\u6cd5**\u6307\u51fa\uff0c\u5728\u91cd\u53d1\u6bb5\uff0c\u4e0d\u5e94\u8fdb\u884cRTO\u4f30\u8ba1\uff1b\n\n- **\u6307\u6570\u8865\u507f\u7b97\u6cd5**\u5b9a\u4e49\uff1a\u5bf9\u4e8e64\u79d2\u65f6\u95f4\u4e0a\u9650\u5185\u6bcf\u4e00\u6b21\u91cd\u53d1\uff0c\u52a0\u500d\u91cd\u53d1\u8d85\u65f6\uff1b\n\n- **\u5feb\u901f\u91cd\u53d1\u7b97\u6cd5**\u5141\u8bb8\u5728\u6536\u52303\u4e2a\u91cd\u590d\u786e\u8ba4\u4e4b\u540e\u8fdb\u884c\u91cd\u53d1\u3002\u8003\u8651\u8fd9\u4e2a\u7b97\u6cd5\u662f\u56e0\u4e3a\uff1a\u5728LAN\u4e0a\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u62a5\u6587\u4e22\u5931\u7684\u68c0\u6d4b\u5feb\u4e8e\u7b49\u5f85RTO\u7ec8\u6b62\u7684\u68c0\u6d4b\u3002\n\n\u5728MODBUS\u5b9e\u73b0\u4e2d\uff0c\u63a8\u8350\u4f7f\u7528\u8fd9\u4e9b\u7b97\u6cd5\u3002\n\n### IP\u5c42\u7684\u53c2\u6570\u914d\u7f6e\n\n#### IP\u53c2\u6570\n\n\u4e0b\u5217\u53c2\u6570\u5fc5\u987b\u5728MODBUS\u5b9e\u73b0\u7684IP\u5c42\u8fdb\u884c\u914d\u7f6e\uff1a\n\n- \u672c\u5730IP\u5730\u5740\uff1aIP\u5730\u5740\u53ef\u4ee5\u662fA\u3001B\u6216C\u7c7b\u7684\u4e00\u79cd\u3002\n\n- \u5b50\u7f51\u63a9\u7801\uff1a\u53ef\u57fa\u4e8e\u5404\u79cd\u539f\u56e0\uff0c\u5c06IP\u7f51\u7edc\u5212\u5206\u6210\u5b50\u7f51\uff1a\u4f7f\u7528\u4e0d\u540c\u7684\u7269\u7406\u4ecb\u8d28\uff08\u4f8b\u5982\uff1a\u4ee5\u592a\u7f51\u3001\u5e7f\u57df\u7f51\u7b49\uff09\u3001\u66f4\u6709\u6548\u7684\u4f7f\u7528\u7f51\u7edc\u5730\u5740\u3001\u4ee5\u53ca\u63a7\u5236\u7f51\u7edc\u6d41\u91cf\u7684\u80fd\u529b\u3002\u5b50\u7f51\u63a9\u7801\u5fc5\u987b\u4e0e\u672c\u5730IP\u5730\u5740\u7684\u7c7b\u578b\u76f8\u4e00\u81f4\u3002\n\n- \u7f3a\u7701\u7f51\u5173\uff1a\u7f3a\u7701\u7f51\u5173\u7684IP\u5730\u5740\u5fc5\u987b\u4e0e\u672c\u5730IP\u5730\u5740\u5728\u540c\u4e00\u5b50\u7f51\u5185\u3002\u7981\u6b62\u4f7f\u75280.0.0.0\u7684\u503c\u3002\u5982\u679c\u6ca1\u6709\u5b9a\u4e49\u7f51\u5173\uff0c\u90a3\u4e48\u6b64\u503c\u53ef\u8bbe\u4e3a127.0.0.1\u6216\u672c\u5730IP\u5730\u5740\u3002\n\n\u6ce8\uff1aMODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u5728IP\u5c42\u4e0a\u4e0d\u8981\u6c42\u6bb5\u529f\u80fd\u3002\n\n\u5e94\u8be5\u5229\u7528\u672c\u5730IP\u5730\u5740\u3001\u5b50\u7f51\u63a9\u7801\u548c\u7701\u7f3a\u7f51\u5173\uff08\u4e0d\u540c\u4e8e0.0.0.0\uff09\u914d\u7f6e\u672c\u5730IP\u7aef\u3002\n\n## \u901a\u4fe1\u5e94\u7528\u5c42\n\n### MODBUS\u5ba2\u6237\u7aef\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508211805192.png?x-oss-process=image\/resize,m_lfit,w_950,h_569)\n\n\u56fe10\uff1aMODBUS\u5ba2\u6237\u7aef\n\n#### MODBUS\u5ba2\u6237\u7aef\u8bbe\u8ba1\n\nMODBUS\/TCP\u534f\u8bae\u4f7f\u5f97\u80fd\u591f\u5bf9\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fdb\u884c\u7b80\u5355\u7684\u8bbe\u8ba1\u3002\u4e0b\u56fe\u63cf\u8ff0\u4e86\u5ba2\u6237\u7aef\u53d1\u9001MODBUS\u8bf7\u6c42\u5e76\u5904\u7406MODBUS\u5e94\u7b54\u7684\u4e3b\u8981\u5904\u7406\u8fc7\u7a0b\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508211830629.png)\n\n\u56fe11\uff1aMODBUS\u5ba2\u6237\u7aef\u64cd\u4f5c\u793a\u610f\u56fe\n\n\u4e00\u4e2aMODBUS\u5ba2\u6237\u673a\u53ef\u4ee5\u63a5\u6536\u4e09\u7c7b\u4e8b\u4ef6\uff1a\n\n- \u4e00\u4e2a\u6765\u81ea\u7528\u6237\u5e94\u7528\u7684\u53d1\u9001\u8bf7\u6c42\u7684\u65b0\u9700\u6c42\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5fc5\u987b\u5bf9MODBUS\u8bf7\u6c42\u8fdb\u884c\u7f16\u7801\uff0c\u5e76\u4f7f\u7528TCP\u7ba1\u7406\u7ec4\u4ef6\u670d\u52a1\u901a\u8fc7\u7f51\u7edc\u8fdb\u884c\u53d1\u9001MODBUS\u8bf7\u6c42\u3002\u4e0b\u5c42\uff08TCP\u7ba1\u7406\u6a21\u5757\uff09\u4f1a\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u4fe1\u606f\uff0c\u8fd9\u4e9b\u9519\u8bef\u4fe1\u606f\u662f\u7531\u4e8eTCP\u8fde\u63a5\u9519\u8bef\u6216\u5176\u4ed6\u9519\u8bef\u4fe1\u606f\u6240\u5bfc\u81f4\u7684\u3002\n\n- \u6765\u81eaTCP\u7ba1\u7406\u7684\u4e00\u4e2a\u54cd\u5e94\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u5206\u6790\u54cd\u5e94\u7684\u5185\u5bb9\uff0c\u5e76\u5411\u7528\u6237\u5e94\u7528\u53d1\u9001\u4e00\u4e2a\u8bc1\u5b9e\u3002\n\n- \u7531\u4e8e\u65e0\u54cd\u5e94\u800c\u8d85\u65f6\u7ed3\u675f\u3002\u53ef\u4ee5\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\u4e00\u4e2a\u91cd\u8bd5\u7535\u6587\uff0c\u6216\u5411\u7528\u6237\u5e94\u7528\u53d1\u9001\u4e00\u4e2a\u5426\u5b9a\u8bc1\u5b9e\u3002\n\n\u6ce8\uff1a\u8fd9\u4e9b\u91cd\u8bd5\u662f\u7531MODBUS\u5ba2\u6237\u673a\u542f\u52a8\u7684\uff0c\u53ef\u4ee5\u5728\u65e0TCP\u786e\u8ba4\u7684\u60c5\u51b5\u4e0b\u7531TCP\u5c42\u6765\u8fdb\u884c\u5176\u5b83\u7c7b\u578b\u7684\u91cd\u8bd5\u3002\n\n#### **MODBUS\u8bf7\u6c42\u7684\u751f\u6210**\n\n\u5728\u6536\u5230\u6765\u81ea\u7528\u6237\u5e94\u7528\u7684\u9700\u6c42\u540e\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u751f\u6210\u4e00\u4e2aMODBUS\u8bf7\u6c42\uff0c\u5e76\u53d1\u9001\u5230TCP\u7ba1\u7406\u3002\n\n\u53ef\u4ee5\u5c06\u751f\u6210MODBUS\u8bf7\u6c42\u5206\u89e3\u6210\u4e3a\u51e0\u4e2a\u5b50\u4efb\u52a1\uff1a\n\n- MODBUS\u4e8b\u52a1\u5904\u7406\u7684\u5b9e\u4f8b\u5316\uff0c\u4f7f\u5ba2\u6237\u673a\u80fd\u591f\u5b58\u50a8\u6240\u6709\u9700\u8981\u7684\u4fe1\u606f\uff0c\u4ee5\u4fbf\u5c06\u54cd\u5e94\u4e0e\u76f8\u5e94\u7684\u8bf7\u6c42\u5339\u914d\uff0c\u5e76\u5411\u7528\u6237\u5e94\u7528\u53d1\u9001\u8bc1\u5b9e\u3002\n\n- MODBUS\u8bf7\u6c42\uff08PDU+MPAB\u62a5\u6587\u5934\uff09\u7684\u7f16\u7801\u3002\u542f\u52a8\u9700\u6c42\u7684\u7528\u6237\u5e94\u7528\u5fc5\u987b\u63d0\u4f9b\u6240\u6709\u9700\u8981\u7684\u4fe1\u606f\uff0c\u4f7f\u5f97\u5ba2\u6237\u673a\u80fd\u591f\u5c06\u8bf7\u6c42\u7f16\u7801\u3002\u6839\u636eMODBUS\u534f\u8bae\u8fdb\u884cMODBUS PDU\u7684\u7f16\u7801\uff08MODBUS\u529f\u80fd\u7801\u3001\u76f8\u5173\u53c2\u6570\u548c\u5e94\u7528\u6570\u636e[2]\uff09\u3002\u586b\u5145MBAP\u62a5\u6587\u5934\u7684\u6240\u6709\u57df\u3002\u7136\u540e\uff0c\u5c06MBAP\u62a5\u6587\u5934\u4f5c\u4e3aPDU\u524d\u7f00\uff0c\u751f\u6210MODBUS\u8bf7\u6c42ADU\u3002\n\n- \u53d1\u9001MODBUS\u8bf7\u6c42ADU\u5230TCP\u7ba1\u7406\u6a21\u5757\uff0cTCP\u7ba1\u7406\u6a21\u5757\u8d1f\u8d23\u5bf9\u8fdc\u7aef\u670d\u52a1\u5668\u5bfb\u627e\u6b63\u786eTCP\u7684\u5957\u63a5\u5b57\u3002\u9664\u4e86MODBUS ADU\u4ee5\u5916\uff0c\u8fd8\u5fc5\u987b\u4f20\u9012\u76ee\u7684IP\u5730\u5740\u3002\n\n\u4e0b\u56fe\u6bd4\u56fe17\u66f4\u6df1\u5165\u5730\u63cf\u8ff0\u4e86\u8bf7\u6c42\u751f\u6210\u7684\u8fc7\u7a0b\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508211856611.png)\n\n\u56fe12\uff1a\u8bf7\u6c42\u751f\u6210\u64cd\u4f5c\u793a\u610f\u56fe\n\n\u4e0b\u9762\u7ed9\u51fa\u4e86\u5b9e\u4f8b\uff1a\u4ece\u5730\u5740\u4e3a05\u7684\u8fdc\u7aef\u670d\u52a1\u5668\u8bfb1\u4e2a\u5b57\u7684MODBUS\u8bf7\u6c42ADU\u7f16\u7801\n\n- **MODBUS\u8bf7\u6c42ADU\u7f16\u7801\uff1a**\n\n\u8bf4\u660e\u5927\u5c0f\u5b9e\u4f8bMBAP\u62a5\u6587\u5934\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26Hi10x15\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26Lo10x01\u534f\u8bae\u6807\u8bc6\u7b2620x0000\u957f\u5ea620x0006\u5355\u5143\u6807\u8bc6\u7b2610xFFMODBUS\u8bf7\u6c42\u529f\u80fd\u7801\uff08*\uff0910x03\u8d77\u59cb\u5730\u574020x0005\u5bc4\u5b58\u5668\u6570\u91cf20x0001\n\n\uff08*\uff09\u53c2\u89c1MODBUS\u534f\u8bae\u89c4\u8303[2]\n\n- **\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26**\n\n\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26\u7528\u4e8e\u5c06\u8bf7\u6c42\u4e0e\u672a\u6765\u54cd\u5e94\u4e4b\u95f4\u5efa\u7acb\u8054\u7cfb\u3002\u56e0\u6b64\uff0c\u5bf9TCP\u8fde\u63a5\u6765\u8bf4\uff0c\u5728\u540c\u4e00\u65f6\u523b\uff0c\u8fd9\u4e2a\u6807\u8bc6\u7b26\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u6709\u51e0\u79cd\u4f7f\u7528\u6b64\u6807\u8bc6\u7b26\u7684\u65b9\u5f0f\uff1a\n\n- \u4f8b\u5982\uff1a\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u5e26\u6709\u8ba1\u6570\u5668\u7684\u7b80\u5355\u201cTCP\u987a\u5e8f\u53f7\u201d\uff0c\u5728\u6bcf\u4e00\u4e2a\u8bf7\u6c42\u65f6\u589e\u52a0\u8ba1\u6570\u5668\uff1b\n\n- \u4e5f\u53ef\u4ee5\u7528\u4f5c\u667a\u80fd\u7d22\u5f15\u6216\u6307\u9488\uff0c\u6765\u8bc6\u522b\u4e8b\u52a1\u5904\u7406\u7684\u5185\u5bb9\uff0c\u4ee5\u4fbf\u8bb0\u5fc6\u5f53\u524d\u7684\u8fdc\u7aef\u670d\u52a1\u5668\u548c\u672a\u5904\u7406\u7684\u8bf7\u6c42\u3002\n\n\u901a\u5e38\uff0c\u5728MODBUS\u4e32\u884c\u94fe\u8def\u4e0a\uff0c\u5ba2\u6237\u673a\u5fc5\u987b\u4e00\u6b21\u53d1\u9001\u4e00\u4e2a\u8bf7\u6c42\u3002\u8fd9\u610f\u5473\u7740\u8fd9\u4e2a\u5ba2\u6237\u673a\u5728\u53d1\u9001\u7b2c\u4e8c\u4e2a\u8bf7\u6c42\u4e4b\u524d\u5fc5\u987b\u7b49\u5f85\u5bf9\u7b2c\u4e00\u4e2a\u8bf7\u6c42\u7684\u56de\u7b54\u3002\u5728MODBUS TCP\u4e0a\uff0c\u53ef\u4ee5\u5411\u540c\u4e00\u4e2a\u670d\u52a1\u5668\u53d1\u9001\u591a\u4e2a\u8bf7\u6c42\u800c\u4e0d\u9700\u7b49\u5f85\u670d\u52a1\u5668\u7684\u8bc1\u5b9e\u3002MODBUS\/TCP\u5230MODBUS\u4e32\u884c\u94fe\u8def\u4e4b\u95f4\u7684\u7f51\u5173\u8d1f\u8d23\u4fdd\u8bc1\u8fd9\u4e24\u79cd\u64cd\u4f5c\u4e4b\u95f4\u7684\u517c\u5bb9\u6027\u3002\n\n\u670d\u52a1\u5668\u6536\u63a5\u53d7\u7684\u8bf7\u6c42\u6570\u91cf\u53d6\u51b3\u4e8e\u5176\u5bb9\u91cf\uff0c\u5373\uff1a\u670d\u52a1\u5668\u8d44\u6e90\u91cf\u548cTCP\u7a97\u53e3\u5c3a\u5bf8\u3002\u540c\u6837\uff0c\u5ba2\u6237\u673a\u540c\u65f6\u542f\u52a8\u4e8b\u52a1\u5904\u7406\u7684\u6570\u91cf\u4e5f\u53d6\u51b3\u4e8e\u5ba2\u6237\u673a\u7684\u8d44\u6e90\u5bb9\u91cf\u3002\u8fd9\u4e2a\u5b9e\u73b0\u53c2\u6570\u79f0\u4e3a\u201cNnmberMaxofClientTransaction\u201d\uff0c\u5fc5\u987b\u4f5c\u4e3aMODBUS\u5ba2\u6237\u673a\u7684\u4e00\u4e2a\u7279\u6027\u8fdb\u884c\u63cf\u8ff0\u3002\u6839\u636e\u8bbe\u5907\u7684\u7c7b\u578b\uff0c\u6b64\u53c2\u6570\u53d6\u503c\u4e3a1\uff5e16\u3002\n\n- **\u5355\u5143\u6807\u8bc6\u7b26**\n\n\u5728MODBUS\u6216MODBUS+\u4e32\u884c\u94fe\u8def\u5b50\u7f51\u4e2d\u5bf9\u8bbe\u5907\u8fdb\u884c\u5bfb\u5740\u65f6\uff0c\u8fd9\u4e2a\u57df\u662f\u7528\u4e8e\u8def\u7531\u7684\u76ee\u7684\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u201cUnit Identifier\u201d\u643a\u5e26\u4e00\u4e2a\u8fdc\u7aef\u8bbe\u5907\u7684MODBUS\u4ece\u7ad9\u5730\u5740\uff1a\n\n- \u5982\u679cMODBUS\u670d\u52a1\u5668\u8fde\u63a5\u5230MODBUS+\u6216MODBUS\u4e32\u884c\u94fe\u8def\u5b50\u7f51\uff0c\u5e76\u901a\u8fc7\u4e00\u4e2a\u6865\u6216\u7f51\u5173\u914d\u7f6e\u5730\u5740\u8fd9\u4e2a\u670d\u52a1\u5668\uff0cMODBUS\u5355\u5143\u6807\u8bc6\u7b26\u5bf9\u8bc6\u522b\u8fde\u63a5\u5230\u7f51\u6865\u6216\u7f51\u5173\u540e\u7684\u5b50\u7f51\u7684\u4ece\u7ad9\u8bbe\u5907\u662f\u5fc5\u9700\u7684\u3002\u76ee\u7684IP\u5730\u5740\u8bc6\u522b\u4e86\u7f51\u6865\u672c\u8eab\u7684\u5730\u5740\uff0c\u800c\u7f51\u6865\u5219\u4f7f\u7528MODBUS\u5355\u5143\u6807\u8bc6\u7b26\u5c06\u8bf7\u6c42\u8f6c\u4ea4\u7ed9\u6b63\u786e\u7684\u4ece\u7ad9\u8bbe\u5907\u3002\n\n- \u5206\u914d\u4e32\u884c\u94fe\u8def\u4e0aMODBUS\u4ece\u7ad9\u8bbe\u5907\u5730\u5740\u4e3a1\uff5e247\uff0810\u8fdb\u5236\uff09\uff0c\u5730\u57400\u4f5c\u4e3a\u5e7f\u64ad\u5730\u5740\u3002\n\n\u5bf9TCP\/IP\u6765\u8bf4\uff0c\u5229\u7528IP\u5730\u5740\u5bfb\u5740MODBUS\u670d\u52a1\u5668\uff1b\u56e0\u6b64\uff0cMODBUS\u5355\u5143\u6807\u8bc6\u7b26\u662f\u65e0\u7528\u7684\u3002\u5fc5\u9700\u4f7f\u7528\u503c0xFF\u3002\n\n- \u5f53\u5bf9\u76f4\u63a5\u8fde\u63a5\u5230TCP\/IP\u7f51\u7edc\u4e0a\u7684MODBUS\u670d\u52a1\u5668\u5bfb\u5740\u65f6\uff0c\u5efa\u8bae\u4e0d\u8981\u5728\u201c\u5355\u5143\u6807\u8bc6\u7b26\u201d\u57df\u4f7f\u7528\u6709\u6548\u7684MODBUS\u4ece\u7ad9\u5730\u5740\u3002\u5728\u4e00\u4e2a\u81ea\u52a8\u7cfb\u7edf\u4e2d\u91cd\u65b0\u5206\u914dIP\u5730\u5740\u7684\u60c5\u51b5\u4e0b\uff0c\u5e76\u4e14\u5982\u679c\u4ee5\u524d\u5206\u914d\u7ed9MODBUS\u670d\u52a1\u5668\u7684IP\u5730\u5740\u53c8\u88ab\u6307\u914d\u7ed9\u7f51\u5173\uff0c\u4f7f\u7528\u4e00\u4e2a\u6709\u6548\u7684\u4ece\u7ad9\u5730\u5740\u53ef\u80fd\u4f1a\u7531\u4e8e\u7f51\u5173\u7684\u8def\u7531\u4e0d\u7545\u800c\u5f15\u8d77\u9ebb\u70e6\u3002\u4f7f\u7528\u65e0\u6548\u7684\u4ece\u7ad9\u5730\u5740\uff0c\u7f51\u5173\u4ec5\u662f\u7b80\u5355\u5730\u5e9f\u5f03MODBUD PDU\uff0c\u800c\u4e0d\u4f1a\u6709\u4efb\u4f55\u95ee\u9898\u3002\u5efa\u8bae\uff1a\u5728\u91c7\u75280xFF\u4f5c\u4e3a\u201c\u5355\u5143\u6807\u8bc6\u7b26\u201d\u7684\u65e0\u6548\u503c\u3002\n\n\u6ce8\uff1a0\u4e5f\u53ef\u4ee5\u7528\u4f5c\u4e0eMODBUS\/TCP\u8bbe\u5907\u76f4\u63a5\u901a\u4fe1\u3002\n\n#### **\u5904\u7406MODBUS\u8bc1\u5b9e**\n\n\u5728TCP\u8fde\u63a5\u4e2d\uff0c\u5f53\u6536\u5230\u4e00\u4e2a\u54cd\u5e94\u5e27\u65f6\uff0c\u4f4d\u4e8eMBAP\u62a5\u6587\u5934\u4e2d\u7684\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26\u7528\u6765\u5c06\u54cd\u5e94\u4e0e\u5148\u524d\u53d1\u5f80TCP\u8fde\u63a5\u7684\u539f\u59cb\u8bf7\u6c42\u8054\u7cfb\u8d77\u6765\uff1a\n\n- \u5982\u679c\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26\u6ca1\u6709\u63d0\u53ca\u4efb\u4f55\u672a\u89e3\u51b3\u7684\u4e8b\u52a1\u5904\u7406\uff0c\u90a3\u4e48\u5fc5\u987b\u5e9f\u5f03\u54cd\u5e94\uff1b\n\n- \u5982\u679c\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26\u63d0\u53ca\u4e86\u672a\u89e3\u51b3\u7684\u4e8b\u52a1\u5904\u7406\uff0c\u90a3\u4e48\u5fc5\u987b\u5206\u89e3\u54cd\u5e94\uff0c\u4ee5\u4fbf\u5411\u7528\u6237\u5e94\u7528\u53d1\u9001MODBUS\u8bc1\u5b9e\uff08\u80af\u5b9a\u7684\u6216\u5426\u5b9a\u7684\u8bc1\u5b9e\uff09\uff1b\n\n\u5206\u89e3\u54cd\u5e94\u5c31\u662f\u68c0\u9a8cMBAP\u62a5\u6587\u5934\u548cMODBUS PDU\u7684\u54cd\u5e94\uff1a\n\n- **MBAP\u62a5\u6587\u5934**\n\n\u5728\u68c0\u9a8c\u534f\u8bae\u6807\u8bc6\u7b26\u5fc5\u4e3a0x0000\u4ee5\u540e\uff0c\u957f\u5ea6\u7ed9\u51fa\u4e86MODBUS\u54cd\u5e94\u7684\u5927\u5c0f\u3002\n\n\u5982\u679c\u54cd\u5e94\u6765\u81ea\u76f4\u63a5\u8fde\u63a5\u5230TCP\/IP\u7f51\u7edc\u7684MODBUS\u670d\u52a1\u5668\u8bbe\u5907\uff0cTCP\u8fde\u63a5\u8bc6\u522b\u7801\u8db3\u4ee5\u6e05\u6670\u5730\u8bc6\u522b\u51fa\u8fdc\u7aef\u670d\u52a1\u5668\u3002\u56e0\u6b64\uff0cMBAP\u5934\u4e2d\u643a\u5e26\u7684\u5355\u5143\u6807\u8bc6\u7b26\u662f\u65e0\u6548\u7684\uff0c\u5fc5\u987b\u5e9f\u5f03\u8fd9\u4e2a\u5355\u5143\u6807\u8bc6\u7b26\u3002\n\n\u5982\u679c\u5c06\u8fdc\u7aef\u670d\u52a1\u5668\u8fde\u63a5\u5728\u4e00\u4e2a\u4e32\u884c\u94fe\u8def\u5b50\u7f51\u4e0a\uff0c\u5e76\u4e14\u54cd\u5e94\u6765\u81ea\u4e00\u4e2a\u7f51\u6865\u3001\u8def\u7531\u6216\u7f51\u5173\uff0c\u90a3\u4e48\u5355\u5143\u6807\u8bc6\u7b26\uff08\u503c\u22600xFF\uff09\u8bc6\u522b\u53d1\u9001\u521d\u59cb\u54cd\u5e94\u7684\u8fdc\u7aefMODBUS\u670d\u52a1\u5668\u3002\n\n- **MODBUS\u54cd\u5e94PDU**\n\n\u5fc5\u987b\u68c0\u9a8c\u529f\u80fd\u7801\uff0c\u6839\u636eMODBUS\u534f\u8bae\uff0c\u5206\u6790MODBUS\u7684\u54cd\u5e94\u683c\u5f0f\uff1a\n\n- \u5982\u679c\u529f\u80fd\u7801\u4e0e\u8bf7\u6c42\u4e2d\u6240\u7528\u7684\u529f\u80fd\u7801\u76f8\u540c\uff0c\u5e76\u4e14\u5982\u679c\u54cd\u5e94\u7684\u683c\u5f0f\u662f\u6b63\u786e\u7684\uff0c\u90a3\u4e48\uff0c\u5411\u7528\u6237\u5e94\u7528\u53d1\u51faMODBUS\u54cd\u5e94\u4f5c\u4e3a\u80af\u5b9a\u7684\u8bc1\u5b9e\u3002\n\n- \u5982\u679c\u529f\u80fd\u7801\u662f\u4e00\u4e2aMODBUS\u5f02\u5e38\u7801\uff08\u529f\u80fd\u7801+80H\uff09\uff0c\u5411\u7528\u6237\u5e94\u7528\u53d1\u51fa\u4e00\u4e2a\u5f02\u5e38\u54cd\u5e94\u4f5c\u4e3a\u80af\u5b9a\u7684\u8bc1\u5b9e\u3002\n\n- \u5982\u679c\u529f\u80fd\u7801\u4e0e\u8bf7\u6c42\u4e2d\u6240\u7528\u7684\u529f\u80fd\u7801\u4e0d\u540c\uff08= \u975e\u9884\u671f\u7684\u529f\u80fd\u7801\uff09\uff0c\u6216\u5982\u679c\u54cd\u5e94\u7684\u683c\u5f0f\u662f\u9519\u8bef\u7684\uff0c\u90a3\u4e48\uff0c\u5411\u7528\u6237\u5e94\u7528\u53d1\u51fa\u4e00\u4e2a\u9519\u8bef\u4fe1\u53f7\u4f5c\u4e3a\u5426\u5b9a\u7684\u8bc1\u5b9e\u3002\n\n\u6ce8\uff1a\u80af\u5b9a\u8bc1\u5b9e\u662f\u6307\u670d\u52a1\u5668\u6536\u5230\u8bf7\u6c42\u547d\u4ee4\u5e76\u505a\u51fa\u54cd\u5e94\u7684\u8bc1\u5b9e\u3002\u5e76\u4e0d\u610f\u5473\u7740\u670d\u52a1\u5668\u80fd\u591f\u6210\u529f\u5730\u5b8c\u6210\u8bf7\u6c42\u547d\u4ee4\u4e2d\u8981\u6c42\u7684\u64cd\u4f5c\uff08MODBUS\u5f02\u5e38\u54cd\u5e94\u6307\u660e\u6267\u884c\u64cd\u4f5c\u5931\u8d25\uff09\u3002\n\n\u4e0b\u56fe\u6bd4\u56fe17\u66f4\u6df1\u5165\u5730\u63cf\u8ff0\u4e86\u8bc1\u5b9e\u5904\u7406\u7684\u8fc7\u7a0b\u3002\n\n\u56fe13\uff1aMODBUS\u8bc1\u5b9e\u5904\u7406\u64cd\u4f5c\u793a\u610f\u56fe\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508212114935.png)\n\n#### **\u8d85\u65f6\u7ba1\u7406**\n\n\u5bf9MODBUS\/TCP\u4e0a\u4e8b\u52a1\u5904\u7406\u6240\u9700\u54cd\u5e94\u65f6\u95f4\u6709\u610f\u4e0d\u4f5c\u89c4\u5b9a\u3002\n\n\u8fd9\u662f\u56e0\u4e3a\uff1a\u4ece\u6beb\u79d2\u7ea7\u7684I\/O\u626b\u63cf\u5230\u5ef6\u65f6\u51e0\u79d2\u949f\u7684\u8fdc\u8ddd\u79bb\u65e0\u7ebf\u94fe\u8def\uff0c\u9884\u671fMODBUS\/TCP\u4f1a\u7528\u4e8e\u53ef\u80fd\u6700\u5bbd\u6cdb\u7684\u901a\u4fe1\u573a\u5408\u3002\n\n\u4ece\u5ba2\u6237\u673a\u7684\u89d2\u5ea6\uff0c\u8d85\u65f6\u5fc5\u987b\u8003\u8651\u7f51\u7edc\u4e0a\u9884\u671f\u7684\u4f20\u8f93\u5ef6\u8fdf\uff0c\u4ee5\u4fbf\u786e\u5b9a\u4e00\u4e2a\u5408\u7406\u7684\u54cd\u5e94\u65f6\u95f4\u3002\u8fd9\u79cd\u4f20\u8f93\u5ef6\u8fdf\u53ef\u80fd\u662f\u4ea4\u6362\u5f0f\u4ee5\u592a\u7f51\u4e2d\u7684\u51e0\u4e2a\u6beb\u79d2\uff0c\u6216\u5e7f\u57df\u7f51\u8fde\u63a5\u4e2d\u7684\u51e0\u767e\u6beb\u79d2\u3002\n\n\u53cd\u8fc7\u6765\u8bb2\uff0c\u4efb\u4f55\u5ba2\u6237\u673a\u542f\u52a8\u5e94\u7528\u91cd\u8bd5\u4f7f\u7528\u7684\u8d85\u65f6\u65f6\u95f4\u5e94\u8be5\u5927\u4e8e\u9884\u671f\u7684\u6700\u5927\u7684\u5408\u7406\u54cd\u5e94\u65f6\u95f4\u3002\u5982\u679c\u4e0d\u9075\u5faa\u8fd9\u4e00\u70b9\uff0c\u76ee\u6807\u8bbe\u5907\u6216\u7f51\u7edc\u5c31\u5b58\u5728\u8fc7\u5ea6\u62e5\u6324\u7684\u6f5c\u5728\u5371\u9669\uff0c\u800c\u53cd\u8fc7\u6765\u4f1a\u5bfc\u81f4\u66f4\u591a\u7684\u9519\u8bef\u3002\u8fd9\u662f\u4e00\u4e2a\u5e94\u8be5\u59cb\u7ec8\u907f\u514d\u7684\u7279\u6027\u3002\n\n\u56e0\u6b64\uff0c\u5728\u5b9e\u9645\u4e2d\uff0c\u5728\u9ad8\u6027\u80fd\u5e94\u7528\u4e2d\u6240\u4f7f\u7528\u7684\u5ba2\u6237\u673a\u8d85\u65f6\u4f3c\u4e4e\u603b\u662f\u4e0e\u7f51\u7edc\u62d3\u6251\u548c\u671f\u671b\u7684\u5ba2\u6237\u673a\u6027\u80fd\u6709\u5173\u3002\n\n\u65f6\u95f4\u56e0\u7d20\u4e0d\u5f88\u91cd\u8981\u7684\u7cfb\u7edf\u7ecf\u5e38\u91c7\u7528TCP\u7f3a\u7701\u503c\u4f5c\u4e3a\u8d85\u65f6\u503c\uff0c\u5728\u591a\u6570\u5e73\u53f0\u4e0a\uff0c\u51e0\u79d2\u949f\u4e4b\u540e\u5c06\u62a5\u544a\u901a\u4fe1\u6545\u969c\u3002\n\n### MODBUS\u670d\u52a1\u5668\u7aef\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508212136910.png?x-oss-process=image\/resize,m_lfit,w_950,h_508)\n\n\u56fe14\uff1aMODBUS\u670d\u52a1\u5668\u7aef\n\nMODBUS\u670d\u52a1\u5668\u7684\u4f5c\u7528\u662f\u4e3a\u5e94\u7528\u5bf9\u8c61\u63d0\u4f9b\u8bbf\u95ee\u4ee5\u53ca\u4e3a\u8fdc\u7aef\u5ba2\u6237\u673a\u63d0\u4f9b\u670d\u52a1\u3002\n\n\u6839\u636e\u7528\u6237\u5e94\u7528\uff0c\u63d0\u4f9b\u4e0d\u540c\u7c7b\u578b\u7684\u8bbf\u95ee\uff1a\n\n- \u7b80\u5355\u8bbf\u95ee\uff1a\u83b7\u5f97\u6216\u8bbe\u5b9a\u5e94\u7528\u5bf9\u8c61\u7684\u5c5e\u6027\uff1b\n\n- \u9ad8\u7ea7\u8bbf\u95ee\uff1a\u542f\u52a8\u4e00\u4e2a\u7279\u5b9a\u7684\u5e94\u7528\u670d\u52a1\n\nMODBUS\u670d\u52a1\u5668\u5fc5\u987b\uff1a\n\n- \u5c06\u4e00\u4e2a\u5e94\u7528\u5bf9\u8c61\u6620\u5c04\u6210\u53ef\u8bfb\u6216\u53ef\u5199\u7684MODBUS\u5bf9\u8c61\uff0c\u4ee5\u4fbf\u83b7\u5f97\u6216\u8bbe\u5b9a\u5e94\u7528\u5bf9\u8c61\u7684\u5c5e\u6027\uff1b\n\n- \u63d0\u4f9b\u4e00\u79cd\u5bf9\u5e94\u7528\u5bf9\u8c61\u542f\u52a8\u670d\u52a1\u7684\u65b9\u6cd5\uff1b\n\n\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0cMODBUS\u670d\u52a1\u5668\u5fc5\u987b\u5206\u6790\u63a5\u6536\u5230\u7684MODBUS\u8bf7\u6c42\uff0c\u5904\u7406\u6240\u9700\u7684\u64cd\u4f5c\uff0c\u8fd4\u56deMODBUS\u54cd\u5e94\u3002\n\n#### **MODBUS\u670d\u52a1\u5668\u8bbe\u8ba1**\n\nMODBUS\u670d\u52a1\u5668\u8bbe\u8ba1\u53d6\u51b3\u4e8e\u5982\u4e0b\u4e24\u4e2a\u65b9\u9762\uff1a\n\n- \u5bf9\u5e94\u7528\u5bf9\u8c61\u8bbf\u95ee\u7684\u7c7b\u578b\uff08\u5bf9\u5c5e\u6027\u7684\u7b80\u5355\u8bbf\u95ee\u6216\u5bf9\u670d\u52a1\u7684\u9ad8\u7ea7\u8bbf\u95ee\uff09\uff1b\n\n- MODBUS\u670d\u52a1\u5668\u4e0e\u7528\u6237\u5e94\u7528\u4e4b\u95f4\u4ea4\u4e92\u4f5c\u7528\u7684\u7c7b\u578b\uff08\u540c\u6b65\u6216\u5f02\u6b65\uff09\u3002\n\n\u4e0b\u56fe\u63cf\u8ff0\u4e86\u670d\u52a1\u5668\u8fdb\u884c\u7684\u4e3b\u8981\u5904\u7406\u8fc7\u7a0b\uff0c\u4ee5\u4fbf\u83b7\u5f97\u6765\u81eaTCP\u7ba1\u7406\u7684MODBUS\u8bf7\u6c42\uff0c\u7136\u540e\uff0c\u5206\u6790\u8bf7\u6c42\uff0c\u5904\u7406\u6240\u9700\u7684\u64cd\u4f5c\uff0c\u8fd4\u56deMODBUS\u54cd\u5e94\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508212200801.png)\n\n\u56fe15\uff1a\u5904\u7406MODBUS\u6307\u4ee4\u64cd\u4f5c\u793a\u610f\u56fe\n\n\u8c61\u524d\u9762\u7684\u64cd\u4f5c\u793a\u610f\u56fe\u793a\u51fa\u7684\u90a3\u6837\uff1a\n\n- MODBUS\u670d\u52a1\u5668\u672c\u8eab\u53ef\u4ee5\u7acb\u5373\u5904\u7406\u4e00\u4e9b\u670d\u52a1\uff0c\u6ca1\u6709\u4e0e\u7528\u6237\u5e94\u7528\u4e4b\u95f4\u7684\u4ea4\u4e92\u4f5c\u7528\uff1b\n\n- \u4e00\u4e9b\u670d\u52a1\u8fd8\u53ef\u80fd\u9700\u8981\u4e0e\u88ab\u5904\u7406\u7684\u7528\u6237\u5e94\u7528\u8fdb\u884c\u660e\u663e\u7684\u4ea4\u4e92\u4f5c\u7528\uff1b\n\n- \u6709\u4e9b\u9ad8\u7ea7\u670d\u52a1\u9700\u8981\u8c03\u7528\u7279\u5b9a\u7684\u63a5\u53e3\uff0c\u5373\uff1aMODBUS\u540e\u53f0\u670d\u52a1\u3002\u4f8b\u5982\uff1a\u53ef\u80fd\u6839\u636e\u7528\u6237\u5e94\u7528\u5c42\u534f\u8bae\uff0c\u4f7f\u7528\u82e5\u5e72\u4e2aMODBUS\u8bf7\u6c42\/\u54cd\u5e94\u4e8b\u52a1\u5904\u7406\u7684\u65f6\u5e8f\u6765\u542f\u52a8\u7528\u6237\u5e94\u7528\u670d\u52a1\u3002\u540e\u53f0\u670d\u52a1\u8d1f\u8d23\u6240\u6709\u5355\u4e2aMODBUS\u4e8b\u52a1\u5904\u7406\u7684\u6b63\u786e\u8fdb\u884c\uff0c\u4ee5\u4fbf\u4e8e\u6267\u884c\u5168\u5c40\u7528\u6237\u5e94\u7528\u670d\u52a1\u3002\n\n\u5728\u4e0b\u5217\u5404\u7ae0\u4e2d\u7ed9\u51fa\u66f4\u5b8c\u6574\u7684\u63cf\u8ff0\u3002\n\nMODBUS\u670d\u52a1\u5668\u53ef\u4ee5\u63a5\u6536\u5e76\u540c\u65f6\u4e3a\u591a\u4e2aMODBUS\u8bf7\u6c42\u63d0\u4f9b\u670d\u52a1\u3002\u670d\u52a1\u5668\u53ef\u4ee5\u540c\u65f6\u63a5\u6536MODBUS\u8bf7\u6c42\u7684\u6700\u5927\u6570\u91cf\u662fMODBUS\u670d\u52a1\u5668\u7684\u4e3b\u8981\u7279\u6027\u4e4b\u4e00\u3002\u8fd9\u4e2a\u6570\u91cf\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u7684\u8bbe\u8ba1\u4ee5\u53ca\u5b83\u7684\u5904\u7406\u548c\u5b58\u50a8\u80fd\u529b\u3002\u5c06\u8fd9\u4e2a\u5b9e\u73b0\u53c2\u6570\u79f0\u4e3a\u201cNumberMaxOfServerTransaction\u201d\uff0c\u5fc5\u987b\u4f5c\u4e3aMODBUS\u670d\u52a1\u5668\u7684\u4e00\u4e2a\u7279\u6027\u63cf\u8ff0\u8fd9\u4e2a\u5b9e\u73b0\u53c2\u6570\u3002\u6839\u636e\u8bbe\u5907\u7684\u80fd\u529b\uff0c\u5b83\u7684\u53d6\u503c\u8303\u56f4\u4e3a\uff1a1\uff5e16\uff0c\u3002\n\n\u201cNumberMaxOfServerTransaction\u201d\u53c2\u6570\u5bf9MODBUS\u670d\u52a1\u5668\u7684\u64cd\u4f5c\u548c\u6027\u80fd\u6709\u975e\u5e38\u663e\u8457\u7684\u5f71\u54cd\u3002\u5c24\u5176\u91cd\u8981\u7684\u662f\uff0c\u6240\u7ba1\u7406\u7684\u5e76\u53d1MODBUS\u4e8b\u52a1\u5904\u7406\u7684\u6570\u91cf\u53ef\u80fd\u5f71\u54cd\u670d\u52a1\u5668\u5bf9MODBUS\u8bf7\u6c42\u7684\u54cd\u5e94\u65f6\u95f4\u3002\n\n#### MODBUS PDU\u68c0\u9a8c\n\n\u4e0b\u56fe\u63cf\u8ff0\u4e86MODBUS PDU\u68c0\u9a8c\u64cd\u4f5c\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508212222546.png)\n\n\u56fe16\uff1aMODBUS PDU\u68c0\u9a8c\u64cd\u4f5c\u6d41\u7a0b\u56fe\n\nMODBUS PDU\u68c0\u9a8c\u529f\u80fd\u9996\u5148\u662f\u5206\u89e3MBAP\u62a5\u6587\u5934\u3002\u5fc5\u987b\u68c0\u9a8c\u534f\u8bae\u6807\u8bc6\u7b26\u57df\uff1a\n\n- \u5982\u679c\u4e0eMODBUS\u534f\u8bae\u7c7b\u578b\u4e0d\u540c\uff0c\u90a3\u4e48\u5e9f\u9664\u8fd9\u4e2a\u6307\u793a\u3002\n\n- \u5982\u679c\u662f\u6b63\u786e\u7684\uff08= MODBUS\u534f\u8bae\u7c7b\u578b\uff1b\u503c\u4e3a0x00\uff09\uff0c\u7acb\u5373\u4e3e\u4f8b\u8bf4\u660e\u4e00\u4e2aMODBUS\u4e8b\u52a1\u5904\u7406\u3002\n\n\u4e00\u4e2a\u670d\u52a1\u5668\u53ef\u4ee5\u8ddd\u79bb\u8bf4\u660e\u7684MODBUS\u4e8b\u52a1\u5904\u7406\u7684\u6700\u5927\u6570\u91cf\u7531\u53c2\u6570\u201cNumberMaxOfTransaction\u201d\uff08\u7cfb\u7edf\u6216\u914d\u7f6e\u53c2\u6570\uff09\u6765\u5b9a\u4e49\u3002\n\n\u5728\u65e0\u6548\u7684\u4e8b\u52a1\u5904\u7406\u7684\u60c5\u51b5\u4e0b\uff0c\u670d\u52a1\u5668\u751f\u6210\u4e00\u4e2aMODBUS\u5f02\u5e38\u54cd\u5e94\uff08\u5f02\u5e38\u78016\uff1a\u670d\u52a1\u5668\u7e41\u5fd9\uff09\u3002\n\n\u5982\u679c\u4e8b\u52a1\u5904\u7406\u662f\u6709\u6548\u7684\uff0c\u5b83\u5c06\u88ab\u542f\u52a8\uff0c\u4ee5\u4fbf\u5b58\u50a8\u4e0b\u5217\u4fe1\u606f\uff1a\n\n- \u7528\u4e8e\u53d1\u9001\u6307\u793a\u7684TCP\u8fde\u63a5\u6807\u8bc6\u7b26\uff08\u7531TCP\u7ba1\u7406\u7ed9\u51fa\uff09\n\n- MODBUS\u4e8b\u52a1\u5904\u7406ID\uff08MBAP\u62a5\u6587\u5934\u4e2d\u7ed9\u51fa\uff09\n\n- \u5355\u5143\u6807\u8bc6\u7b26\uff08MBAP\u62a5\u6587\u5934\u4e2d\u7ed9\u51fa\uff09\n\n\u7136\u540e\uff0c\u5206\u89e3MODBUS PDU\u3002\u9996\u5148\u5206\u6790\u529f\u80fd\u7801\uff1a\n\n- \u5f53\u65e0\u6548\u65f6\uff0c\u751f\u6210MODBUS\u5f02\u5e38\u54cd\u5e94\uff08\u5f02\u5e38\u78011\uff1a\u65e0\u6548\u529f\u80fd\uff09\n\n- \u5982\u679c\u63a5\u6536\u529f\u80fd\u7801\uff0c\u670d\u52a1\u5668\u542f\u52a8\u4e00\u4e2a\u201cMODBUS\u670d\u52a1\u5904\u7406\u201d\u64cd\u4f5c\u3002\n\n#### MODBUS\u670d\u52a1\u5904\u7406\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508212243966.png)\n\n\u56fe17\uff1aMODBUS \u670d\u52a1\u5904\u7406\u64cd\u4f5c\u6d41\u7a0b\u56fe\n\n\u6839\u636e\u540e\u9762\u5b9e\u4f8b\u4e2d\u7684\u8bbe\u5907\u8f6f\u4ef6\u548c\u786c\u4ef6\u7ed3\u6784\uff0c\u53ef\u4ee5\u7528\u4e0d\u540c\u7684\u65b9\u5f0f\u8fdb\u884c\u8981\u6c42\u7684MODBUS\u670d\u52a1\u5904\u7406\uff1a\n\n- \u5728\u4e00\u4e2a\u5c0f\u578b\u8bbe\u5907\u6216\u5355\u7ebf\u7a0b\u4f53\u7cfb\u7ed3\u6784\u5185\uff0cMODBUS\u670d\u52a1\u5668\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u7528\u6237\u5e94\u7528\u6570\u636e\uff0c\u670d\u52a1\u5668\u81ea\u8eab\u53ef\u4ee5\u672c\u5730\u5904\u7406\u8981\u6c42\u7684\u670d\u52a1\uff0c\u800c\u65e0\u9700\u8c03\u7528\u540e\u53f0\u670d\u52a1\u3002\n\n\u6839\u636e\u201cMODBUS\u534f\u8bae\u89c4\u8303\u201d\uff0c\u8fdb\u884c\u8fd9\u79cd\u5904\u7406\u3002\u5728\u51fa\u73b0\u9519\u8bef\u7684\u60c5\u51b5\u4e0b\uff0c\u751f\u6210MODBUS\u5f02\u5e38\u54cd\u5e94\u3002\n\n- \u5728\u4e00\u4e2a\u6a21\u5757\u5316\u7684\u591a\u5904\u7406\u5668\u7684\u8bbe\u5907\u6216\u591a\u7ebf\u7a0b\u4f53\u7cfb\u7ed3\u6784\u4e2d\uff0c\u201c\u901a\u4fe1\u5c42\u201d\u548c\u201c\u7528\u6237\u5e94\u7528\u5c42\u201d\u662f\u4e24\u4e2a\u72ec\u7acb\u7684\u5b9e\u4f53\uff0c\u901a\u4fe1\u5b9e\u4f53\u53ef\u4ee5\u5b8c\u5168\u5730\u5904\u7406\u4e00\u4e9b\u4e0d\u91cd\u8981\u7684\u670d\u52a1\uff0c\u800c\u5176\u4ed6\u7684\u670d\u52a1\u9700\u8981\u5e94\u7528\u540e\u53f0\u670d\u52a1\u4e0e\u7528\u6237\u5e94\u7528\u5b9e\u4f53\u534f\u8c03\u5b8c\u6210\u3002\n\n\u4e3a\u4e86\u5b9e\u73b0\u4e0e\u7528\u6237\u5e94\u7528\u7684\u4ea4\u4e92\u4f5c\u7528\uff0cMODBUS\u540e\u53f0\u670d\u52a1\u5fc5\u987b\u6267\u884c\u6240\u6709\u9002\u5f53\u7684\u673a\u5236\uff0c\u4ee5\u4fbf\u5904\u7406\u7528\u6237\u5e94\u7528\u7684\u4e8b\u52a1\u5904\u7406\uff0c\u5e76\u4e14\u6b63\u786e\u7ba1\u7406\u7528\u6237\u5e94\u7528\u8c03\u7528\u548c\u76f8\u5e94\u7684\u54cd\u5e94\u3002\n\n#### **\u7528\u6237\u5e94\u7528\u63a5\u53e3\uff08\u540e\u53f0\u63a5\u53e3\uff09**\n\n\u5728MODBUS\u540e\u53f0\u670d\u52a1\u4e2d\uff0c\u53ef\u4ee5\u6267\u884c\u51e0\u79cd\u7b56\u7565\u6765\u5b8c\u6210\u5de5\u4f5c\uff0c\u867d\u7136\u4ece\u7528\u6237\u7f51\u7edc\u541e\u5410\u91cf\u3001\u63a5\u53e3\u5e26\u5bbd\u4f7f\u7528\u3001\u54cd\u5e94\u65f6\u95f4\u3001\u751a\u81f3\u8bbe\u8ba1\u5de5\u4f5c\u91cf\u7684\u89d2\u5ea6\uff0c\u8fd9\u51e0\u79cd\u7b56\u7565\u662f\u4e0d\u5747\u8861\u7684\u3002\n\nMODBUS\u540e\u53f0\u670d\u52a1\u5c06\u5bf9\u7528\u6237\u5e94\u7528\u91c7\u7528\u9002\u5f53\u63a5\u53e3\uff1a\n\n- \u6216\u57fa\u4e8e\u4e32\u884c\u94fe\u8def\u7684\u7269\u7406\u63a5\u53e3\uff0c\u6216\u53cc\u53e3RAM\u65b9\u6848\uff0c\u6216\u4e00\u6761\u7b80\u5355\u7684I\/O\u7535\u7f06\uff0c\u6216\u7531\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u57fa\u4e8e\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u7684\u903b\u8f91\u63a5\u53e3\u3002\n\n- \u5230\u7528\u6237\u5e94\u7528\u7684\u63a5\u53e3\u53ef\u4ee5\u662f\u540c\u6b65\u7684\u6216\u5f02\u6b65\u7684\u3002\n\nMODBUS\u540e\u53f0\u670d\u52a1\u8fd8\u5c06\u4f7f\u7528\u9002\u5f53\u7684\u8bbe\u8ba1\u6a21\u5f0f\u6765\u5f97\u5230\/\u8bbe\u5b9a\u76ee\u6807\u5c5e\u6027\u6216\u89e6\u53d1\u670d\u52a1\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e00\u4e2a\u7b80\u5355\u7684\u201c\u7f51\u5173\u6a21\u5f0f\u201d\u5c06\u662f\u8db3\u591f\u7684\u3002\u5728\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0c\u4ece\u7b80\u5355\u7684\u4ea4\u6362\u8868\u5386\u53f2\u5230\u66f4\u590d\u6742\u7684\u91cd\u590d\u673a\u5236\u4e2d\uff0c\u8bbe\u8ba1\u8005\u5c06\u5fc5\u987b\u6267\u884c\u5e26\u6709\u9ad8\u901f\u7f13\u5b58\u7b56\u7565\u7684\u201c\u4ee3\u7406\u670d\u52a1\u5668\u6a21\u5f0f\u201d\uff0c\u3002\n\nMODBUS\u540e\u53f0\u670d\u52a1\u6709\u8d23\u4efb\u5b9e\u73b0\u534f\u8bae\u7684\u8f6c\u6362\uff0c\u4ee5\u4fbf\u4e0e\u7528\u6237\u5e94\u7528\u8fdb\u884c\u4ea4\u4e92\u4f5c\u7528\u3002\u56e0\u6b64\uff0c\u5b83\u5fc5\u987b\u5177\u6709\u673a\u5236\u6765\u5b9e\u73b0\u62a5\u6587\u7684\u5206\u62c6\u548c\u91cd\u7ec4\u3001\u6570\u636e\u4e00\u81f4\u6027\u4fdd\u8bc1\u4ee5\u53ca\u6240\u6709\u9700\u8981\u7684\u540c\u6b65\u7b49\u529f\u80fd\u3002\n\n#### MODBUS\u54cd\u5e94\u7684\u751f\u6210\n\n\u4e00\u65e6\u5904\u7406\u8bf7\u6c42\uff0cMODBUS\u670d\u52a1\u5668\u5fc5\u987b\u4f7f\u7528\u9002\u5f53\u7684MODBUS\u670d\u52a1\u5668\u4e8b\u52a1\u5904\u7406\u751f\u6210\u4e00\u4e2a\u54cd\u5e94\uff0c\u5e76\u4e14\u5fc5\u987b\u5c06\u54cd\u5e94\u53d1\u9001\u5230TCP\u7ba1\u7406\u7ec4\u4ef6\u3002\n\n\u6839\u636e\u5904\u7406\u7ed3\u679c\uff0c\u53ef\u4ee5\u751f\u6210\u4e24\u7c7b\u54cd\u5e94\uff1a\n\n- \u80af\u5b9a\u7684MODBUS\u54cd\u5e94\uff1a\n\n- \u54cd\u5e94\u529f\u80fd\u7801 = \u8bf7\u6c42\u529f\u80fd\u7801\n\n- MODBUS\u5f02\u5e38\u54cd\u5e94\uff1a\n\n- \u76ee\u7684\u662f\u4e3a\u5ba2\u6237\u673a\u63d0\u4f9b\u4e0e\u5904\u7406\u8fc7\u7a0b\u68c0\u6d4b\u5230\u7684\u9519\u8bef\u76f8\u5173\u7684\u4fe1\u606f\n\n- \u54cd\u5e94\u529f\u80fd\u7801 = \u8bf7\u6c42\u529f\u80fd\u7801+0x80\n\n- \u63d0\u4f9b\u5f02\u5e38\u7801\u6765\u8868\u660e\u51fa\u9519\u7684\u539f\u56e0\u3002\n\n\u5f02\u5e38\u7801MODBUS\u540d\u79f0\u5907\u6ce801\u975e\u6cd5\u7684\u529f\u80fd\u7801\u670d\u52a1\u5668\u4e0d\u4e86\u89e3\u529f\u80fd\u780102\u975e\u6cd5\u7684\u6570\u636e\u5730\u5740\u4e0e\u8bf7\u6c42\u6709\u517303\u975e\u6cd5\u7684\u6570\u636e\u503c\u4e0e\u8bf7\u6c42\u6709\u517304\u670d\u52a1\u5668\u6545\u969c\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u670d\u52a1\u5668\u6545\u969c05\u786e\u8ba4\u670d\u52a1\u5668\u63a5\u53d7\u670d\u52a1\u8c03\u7528\uff0c\u4f46\u662f\u9700\u8981\u76f8\u5bf9\u957f\u7684\u65f6\u95f4\u5b8c\u6210\u670d\u52a1\u3002\u56e0\u6b64\uff0c\u670d\u52a1\u5668\u4ec5\u8fd4\u56de\u4e00\u4e2a\u670d\u52a1\u8c03\u7528\u63a5\u6536\u7684\u786e\u8ba4\u300206\u670d\u52a1\u5668\u7e41\u5fd9\u670d\u52a1\u5668\u4e0d\u80fd\u63a5\u53d7MODBUS\u8bf7\u6c42PDU\u3002\u5ba2\u6237\u5e94\u7528\u7531\u8d23\u4efb\u51b3\u5b9a\u662f\u5426\u548c\u4f55\u65f6\u91cd\u53d1\u8bf7\u6c42\u30020A\u7f51\u5173\u6545\u969c\u7f51\u5173\u8def\u7ecf\u662f\u65e0\u6548\u7684\u30020B\u7f51\u5173\u6545\u969c\u76ee\u6807\u8bbe\u5907\u6ca1\u6709\u54cd\u5e94\u3002\u7f51\u5173\u751f\u6210\u8fd9\u4e2a\u5f02\u5e38\u4fe1\u606f\u3002\n\nMODBUS\u54cd\u5e94PDU\u5fc5\u987b\u4ee5MBAP\u62a5\u6587\u5934\u505a\u524d\u7f00\uff0c\u4f7f\u7528\u4e8b\u52a1\u5904\u7406\u6b63\u6587\u4e2d\u7684\u6570\u636e\u751f\u6210MBAP\u62a5\u6587\u5934\u3002\n\n- **\u5355\u5143\u6807\u8bc6\u7b26**\n\n\u5f53\u5728\u6240\u6536\u5230\u7684MODBUS\u8bf7\u6c42\u4e2d\u7ed9\u51fa\u5355\u5143\u6807\u8bc6\u7b26\u65f6\uff0c\u62f7\u8d1d\u8fd9\u4e2a\u5355\u5143\u6807\u8bc6\u7b26\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728\u4e8b\u52a1\u5904\u7406\u7684\u6b63\u6587\u4e2d\u3002\n\n- **\u957f\u5ea6**\n\n\u670d\u52a1\u5668\u8ba1\u7b97MODBUS PDU\u548c\u5355\u5143\u6807\u8bc6\u7b26\u5b57\u7684\u5927\u5c0f\u3002\u5728\u201c\u957f\u5ea6\u201d\u57df\u4e2d\u8bbe\u7f6e\u8fd9\u4e2a\u503c\u3002\n\n- **\u534f\u8bae\u6807\u8bc6\u7b26**\n\n\u8bbe\u7f6e\u534f\u8bae\u6807\u8bc6\u7b26\u57df\u4e3a0x0000\uff08MODBUS\u534f\u8bae\uff09\uff0c\u5728\u6240\u6536\u5230\u7684MODBUS\u8bf7\u6c42\u4e2d\u7ed9\u51fa\u534f\u8bae\u6807\u8bc6\u7b26\u3002\n\n- **\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26**\n\n\u8bbe\u7f6e\u8fd9\u4e2a\u57df\u4e3a\u201c\u4e8b\u52a1\u5904\u7406\u6807\u8bc6\u7b26\u201d\u503c\uff0c\u5b83\u4e0e\u521d\u59cb\u8bf7\u6c42\u6709\u5173\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728\u3002\n\n\u5229\u7528\u4e8b\u52a1\u5904\u7406\u6b63\u6587\u4e2d\u5b58\u50a8\u7684TCP\u8fde\u63a5\u5bf9\u6b63\u786e\u7684MODBUS\u5ba2\u6237\u673a\u8fd4\u56deMODBUS\u54cd\u5e94\u3002\u5f53\u53d1\u9001\u54cd\u5e94\u65f6\uff0c\u4e8b\u52a1\u5904\u7406\u6b63\u6587\u5fc5\u987b\u91ca\u7a7a\u95f2\u7684\u3002\n\n\u5b9e\u73b0\u6307\u5357\n\n\u672c\u7ae0\u7684\u76ee\u7684\u662f\u63d0\u51fa\u4e00\u4e2a\u5b9e\u73b0\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u7684\u5b9e\u4f8b\u3002\u4e0b\u9762\u6240\u63cf\u8ff0\u7684\u6a21\u578b\u53ef\u7528\u4f5c\u5ba2\u6237\u673a\u6216\u670d\u52a1\u5668\u5b9e\u73b0MODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u8fc7\u7a0b\u7684\u6307\u5357\u3002\n\n## \u5bf9\u8c61\u6a21\u578b\u793a\u610f\u56fe\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508212308474.png)\n\n\u56fe18\uff1aMODBUS\u62a5\u6587\u4f20\u8f93\u670d\u52a1\u5bf9\u8c61\u6a21\u578b\u793a\u610f\u56fe\n\n\u56db\u79cd\u4e3b\u8981\u7a0b\u5e8f\u5305\u6784\u6210\u5bf9\u8c61\u6a21\u578b\u793a\u610f\u56fe\uff1a\n\n- \u914d\u7f6e\u5c42\uff0c\u5b83\u914d\u7f6e\u548c\u7ba1\u7406\u5176\u5b83\u7a0b\u5e8f\u5305\u7ec4\u4ef6\u7684\u64cd\u4f5c\u6a21\u5f0f\n\n- TCP\u7ba1\u7406\uff0c\u5b83\u4f7fTCP\/IP\u6808\u548c\u7ba1\u7406TCP\u8fde\u63a5\u7684\u901a\u4fe1\u5e94\u7528\u5c42\u8fde\u63a5\u3002\u8fd9\u6307\u7684\u662f\u5957\u63a5\u5b57\u63a5\u53e3\u7684\u7ba1\u7406\u3002\n\n- \u901a\u4fe1\u5e94\u7528\u5c42\uff0c\u5b83\u7531\u5728\u4e00\u4fa7\u7684MODBUS\u5ba2\u6237\u673a\u548c\u5728\u53e6\u4e00\u4fa7\u7684MODBUS\u670d\u52a1\u5668\u7ec4\u6210\u3002\u8be5\u7a0b\u5e8f\u5305\u548c\u7528\u6237\u5e94\u7528\u94fe\u63a5\u3002\n\n- \u7528\u6237\u5e94\u7528\uff0c\u5b83\u548c\u8bbe\u5907\u5e94\u7528\u76f8\u5bf9\u5e94\uff0c\u5b83\u5b8c\u5168\u4e0e\u8bbe\u5907\u6709\u5173\uff0c\u56e0\u6b64\u5728\u672c\u6587\u4ef6\u4e2d\u4e0d\u4e88\u8ba8\u8bba\u3002\n\n\u672c\u6a21\u578b\u4e0e\u5b9e\u73b0\u7684\u9009\u62e9\u65e0\u5173\uff0c\u4f8b\u5982\uff1aOS\u7c7b\u578b\u3001\u5b58\u50a8\u7ba1\u7406\u7b49\u3002\u4e3a\u4fdd\u8bc1\u8fd9\u79cd\u65e0\u76f8\u5173\u6027\uff0c\u5728TCP\u7ba1\u7406\u5c42\u548c\u901a\u4fe1\u5c42\u4e4b\u95f4\u4ee5\u53ca\u5728\u901a\u4fe1\u5c42\u548c\u7528\u6237\u5e94\u7528\u5c42\u4e4b\u95f4\u4f7f\u7528\u666e\u901a\u754c\u9762\u5c42\uff08generic Interface layers\uff09\u3002\n\n\u6709\u4e0d\u540c\u7684\u5b9e\u73b0\u65b9\u6cd5\u5b9e\u73b0\u8be5\u754c\u9762\uff1a\u4e24\u9879\u4efb\u52a1\u4e4b\u95f4\u7684\u4f20\u8f93\u3001\u5171\u4eab\u5b58\u50a8\u5668\u3001\u4e32\u884c\u94fe\u63a5\u754c\u9762\u3001\u8fc7\u7a0b\u547c\u53eb\u7b49\u3002\n\n\u4e3a\u5b9a\u4e49\u4e0b\u9762\u7684\u5b9e\u73b0\u6a21\u578b\uff0c\u4f5c\u4e86\u4e00\u4e9b\u5047\u5b9a\uff1a\n\n- \u9759\u6001\u5b58\u50a8\u5668\u7ba1\u7406\n\n- \u670d\u52a1\u5668\u7684\u540c\u6b65\u5904\u7406\n\n- \u5904\u7406\u6709\u5173\u6240\u6709\u5957\u63a5\u5b57\u63a5\u6536\u7684\u4efb\u52a1\u3002\n\n### TCP\u7ba1\u7406\u7a0b\u5e8f\u5305\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508222259773.png?x-oss-process=image\/resize,m_lfit,w_950,h_906)\n\n\u56fe19\uff1aMODBUS TCP\u7ba1\u7406\u7a0b\u5e8f\u5305\n\nTCP\u7ba1\u7406\u7a0b\u5e8f\u5305\u5305\u62ec\u4e0b\u5217\u7c7b\uff1a\n\nClnterfaceConnexion\uff1a\u8be5\u7c7b\u7684\u4f5c\u7528\u662f\u7ba1\u7406\u7528\u4e8e\u8fde\u63a5\u7684\u5b58\u50a8\u5e93\u3002\n\nCltemConnexion\uff1a\u8be5\u7c7b\u542b\u6709\u63cf\u8ff0\u8fde\u63a5\u6240\u9700\u8981\u7684\u6240\u6709\u4fe1\u606f\u3002\n\nCTCPConnexion\uff1a\u8be5\u7c7b\u63d0\u4f9b\u81ea\u52a8\u7ba1\u7406TCP\u8fde\u63a5\u7684\u65b9\u6cd5\uff08CStackTCP_IP\u63d0\u4f9b\u63a5\u53e3\u5957\u63a5\u5b57\uff09\u3002\n\nCconnexionMngt\uff1a\u8be5\u7c7b\u7ba1\u7406\u6240\u6709\u8fde\u63a5\uff0c\u5e76\u901a\u8fc7CinterfaceindicationMsg\u548cCinterfaceRoseponseMsg\u5411MODBUS\u670d\u52a1\u5668\/MODBUS\u5ba2\u6237\u673a\u53d1\u9001\u8bf7\u6c42\/\u54cd\u5e94\u3002\u8be5\u7c7b\u8fd8\u5904\u7406\u8fde\u63a5\u5efa\u7acb\u7684\u8bbf\u95ee\u63a7\u5236\u3002\n\nCMBAP\uff1a\u8be5\u7c7b\u63d0\u4f9b\u8bfb\/\u5199\/\u5206\u6790MODBUS MBAP\u7684\u65b9\u6cd5\u3002\n\nCStackTCP_IP\uff1a\u8be5\u7c7b\u6267\u884c\u5957\u63a5\u5b57\u670d\u52a1\u5e76\u63d0\u4f9b\u6808\u7684\u53c2\u6570\u914d\u7f6e\u3002\n\n\u914d\u7f6e\u5c42\u7a0b\u5e8f\u5305\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508222427280.png)\n\n\u56fe20\uff1aMODBUS\u914d\u7f6e\u5c42\u7a0b\u5e8f\u5305\n\n\u914d\u7f6e\u5c42\u7a0b\u5e8f\u5305\u5305\u62ec\u4e0b\u5217\u7c7b\uff1a\n\nTConfigreObject\uff1a\u8be5\u7c7b\u5c06\u5404\u7ec4\u4ef6\u76f8\u4e92\u914d\u7f6e\u6240\u9700\u7684\u6570\u636e\u5206\u7ec4\u3002\u7528CoperatingMode\u7c7b\u4e2d\u7684m_Confire\u65b9\u6cd5\u586b\u5145\u8fd9\u4e2a\u7ed3\u6784\u3002\u6bcf\u4e2a\u9700\u8981\u914d\u7f6e\u7684\u7c7b\u4ece\u8fd9\u4e2a\u5bf9\u8c61\u4e2d\u53d6\u5f97\u81ea\u5df1\u7684\u6570\u636e\u3002\u914d\u7f6e\u6570\u636e\u4e0e\u5b9e\u73b0\u672c\u8eab\u6709\u5173\u3002\u56e0\u6b64\uff0c\u63d0\u4f9b\u8be5\u7c7b\u7684\u5c5e\u6027\u8868\u4f5c\u4e3a\u4e00\u4e2a\u5b9e\u4f8b\u3002\n\nCoperatingMode\uff1a\u8be5\u7c7b\u7684\u4f5c\u7528\u662f\u586b\u5145TConfigueObject\uff08\u6839\u636e\u7528\u6237\u7684\u914d\u7f6e\uff09\u548c\u7ba1\u7406\u4e0b\u8ff0\u7c7b\u7684\u64cd\u4f5c\u6a21\u5f0f\u3002\n\n- CMODBUSServer\n\n- CMODBUSClient\n\n- CconnexionMngt\n\n### \u901a\u4fe1\u5c42\u7a0b\u5e8f\u5305\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508222513782.png)\n\n\u56fe21\uff1aMODBUS\u901a\u4fe1\u5e94\u7528\u5c42\u7a0b\u5e8f\u5305\n\n\u901a\u4fe1\u5e94\u7528\u5c42\u7a0b\u5e8f\u5305\u5305\u62ec\u4ee5\u4e0b\u5404\u7c7b\uff1a\n\nCMODBUSServer\uff1a\u4eceCinterfaceIndicationMsg\u4e2d\u63a5\u6536MODBUS\u8be2\u95ee\uff08\u901a\u8fc7m_ServerRecievingMessage\u65b9\u6cd5\uff09\u3002\u8be5\u7c7b\u7684\u4f5c\u7528\u662f\u6839\u636e\u8be2\u95ee\u5efa\u7acbMODBUS\u54cd\u5e94\u6216MODBUS\u5f02\u5e38\uff08\u4ece\u7f51\u7edc\u8fdb\u5165\uff09\u3002\u8be5\u7c7b\u5b9e\u73b0MODBUS\u670d\u52a1\u5668\u7684Graph State\u3002\u53ea\u6709\u7c7bCoperatingMode\u53d1\u9001\u4e86\u7528\u6237\u914d\u7f6e\u548c\u6b63\u786e\u7684\u64cd\u4f5c\u6a21\u5f0f\uff0c\u624d\u53ef\u80fd\u751f\u6210\u54cd\u5e94\u3002\n\nCMODBUSClient\uff1a\u4ece\u7c7bCinterfaceUserApplication\u4e2d\u8bfb\u53d6MODBUS\u8be2\u95ee\uff0c\u5ba2\u6237\u673a\u7684\u4efb\u52a1\u662f\u7528m_ClientReceivingMessage\u65b9\u6cd5\u63a5\u6536\u8be2\u95ee\u3002\u8be5\u7c7b\u5b9e\u73b0MODBUS\u5ba2\u6237\u673a\u7684State Graph\uff0c\u5e76\u4e14\u7ba1\u7406\u94fe\u63a5\u5e26\u6709\u54cd\u5e94\u7684\u8be2\u95ee\u7684\u4e8b\u52a1\u5904\u7406\uff08\u6765\u81ea\u7f51\u7edc\u7684\uff09\u3002\u53ea\u6709\u7c7bCoperatingMode\u53d1\u9001\u4e86\u7528\u6237\u914d\u7f6e\u548c\u6b63\u786e\u7684\u64cd\u4f5c\u6a21\u5f0f\uff0c\u624d\u80fd\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\u8be2\u95ee\u3002\n\nCTransaction\uff1a\u8be5\u7c7b\u5b9e\u73b0\u7ba1\u7406\u4e8b\u52a1\u7684\u65b9\u6cd5\u548c\u7ed3\u6784\u3002\n\n### \u63a5\u53e3\u7c7b\n\nCInterfaceUserApplication\uff1a\u8be5\u7c7b\u8868\u793a\u4e0e\u7528\u6237\u5e94\u7528\u7684\u63a5\u53e3\uff0c\u5b83\u63d0\u4f9b\u4e24\u79cd\u8bbf\u95ee\u7528\u6237\u6570\u636e\u7684\u65b9\u6cd5\u3002\u5728\u5b9e\u9645\u7684\u5b9e\u73b0\u4e2d\uff0c\u6839\u636e\u786c\u4ef6\u548c\u8f6f\u4ef6\u8bbe\u5907\u7684\u80fd\u529b\uff0c\u7528\u4e0d\u540c\u7684\u65b9\u5f0f\u5b9e\u73b0\u8fd9\u79cd\u65b9\u6cd5\uff08\u76f8\u5f53\u4e8e\u4e00\u4e2a\u7ec8\u7aef\u9a71\u52a8\u5668\u3001\u8bbf\u95eePCMCIA\u7684\u5b9e\u4f8b\u3001\u5171\u4eab\u5b58\u50a8\u5668\u7b49\uff09\u3002\n\nCInterfaceIndicationMsg\uff1a\u8be5\u63a5\u53e3\u7c7b\u7528\u6765\u4ece\u7f51\u7edc\u5411MODBUS\u670d\u52a1\u5668\u53d1\u9001\u8be2\u95ee\uff0c\u4ee5\u53ca\u4ece\u7f51\u7edc\u5411\u5ba2\u6237\u673a\u53d1\u9001\u54cd\u5e94\u3002\u8be5\u7c7b\u4f7fTCPManagement\u548c\u901a\u4fe1\u5e94\u7528\u5c42\u7a0b\u5e8f\u5305\u8fde\u63a5\uff08\u4ece\u7f51\u7edc\u4e2d\uff09\u3002\u8be5\u7c7b\u7684\u5b9e\u73b0\u4e0e\u7f51\u7edc\u6709\u5173\u3002\n\nCInterfaceResponseMsg\uff1a\u8be5\u63a5\u53e3\u7c7b\u7528\u4e8e\u4ece\u670d\u52a1\u5668\u63a5\u53d7\u54cd\u5e94\uff0c\u4ee5\u53ca\u4ece\u5ba2\u6237\u673a\u5411\u7f51\u7edc\u53d1\u9001\u8be2\u95ee\u3002\u8be5\u7c7b\u4f7f\u901a\u4fe1\u5e94\u7528\u5c42\u7a0b\u5e8f\u5305\u548cTCPManagement\u8fde\u63a5\uff08\u5411\u7f51\u7edc\uff09\u3002\u8be5\u7c7b\u7684\u5b9e\u73b0\u548c\u8bbe\u5907\u6709\u5173\u3002\n\n## \u901a\u4fe1\u5b9e\u73b0\u7684\u7c7b\u7684\u793a\u610f\u56fe\n\n\u4e0b\u5217\u7c7b\u7684\u793a\u610f\u56fe\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u5b9e\u73b0\u65b9\u6848\u7684\u793a\u610f\u56fe\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508214216849.png?x-oss-process=image\/resize,m_lfit,w_950,h_1066)\n\n\u56fe22\uff1a\u7c7b\u7684\u793a\u610f\u56fe\n\n## \u5e8f\u5217\u56fe\n\n\u4e0b\u9762\u63cf\u8ff0\u4e86\u4e24\u4e2a\u5e8f\u5217\u56fe\uff0c\u4ee5\u4fbf\u8bf4\u660e\u5ba2\u6237\u673aMODBUS\u4e8b\u52a1\u5904\u7406\u548c\u670d\u52a1\u5668MODBUS\u4e8b\u52a1\u5904\u7406\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508212826496.png?x-oss-process=image\/resize,m_lfit,w_950,h_835)\n\n\u56fe23\uff1aMODBUS\u5ba2\u6237\u673a\u5e8f\u5217\u56fe\n\n\u4e3a\u66f4\u597d\u5730\u7406\u89e3\u5ba2\u6237\u673a\u5e8f\u5217\u56fe\uff0c\u7b80\u5355\u7684\u6ce8\u91ca\u4e3a\uff1a\n\n\u7b2c\u4e00\u6b65\uff1a\u8bfb\u6765\u81ea\u7528\u6237\u5e94\u7528\u7684\u8be2\u95ee(\u901a\u8fc7m_Read\u65b9\u6cd5)\u3002\n\n\u7b2c\u4e8c\u6b65\uff1a\u5ba2\u6237\u673a\u7684\u4efb\u52a1\u662f\u63a5\u6536MODBUS\u8be2\u95ee\uff08\u901a\u8fc7m_ClientReceivingMessage\u65b9\u6cd5\uff09\u3002\u8fd9\u662f\u5ba2\u6237\u673a\u7684\u8fdb\u5165\u70b9\u3002\u4e3a\u4e86\u4f7f\u8be2\u95ee\u548c\u76f8\u5e94\u7684\u54cd\u5e94\u76f8\u4e92\u534f\u8c03\uff0c\u5f53\u5f97\u5230\u8be2\u95ee\u65f6\uff0c\u5ba2\u6237\u673a\u4f7f\u7528\u4e8b\u52a1\u5904\u7406\u8d44\u6e90\uff08\u7c7b\u540d\uff1aCTransaction\uff09\u3002\u901a\u8fc7\u547c\u53eb\u7c7b\u63a5\u53e3CInterfaceResponseMsg\u5411TCP_Management\u53d1\u9001MODBUS\u8be2\u95ee\uff08\u901a\u8fc7m_MODBUSRequest\u65b9\u6cd5\uff09\u3002\n\n\u7b2c\u4e09\u6b65\uff1a\u5982\u8fc7\u5df2\u5efa\u7acb\u8fde\u63a5\uff0c\u5e76\u4e14\u4e0d\u9700\u8981\u5bf9\u8fde\u63a5\u505a\u4ec0\u4e48\uff0c\u90a3\u4e48\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\u62a5\u6587\u3002\u5426\u5219\uff0c\u5728\u7f51\u7edc\u4e0a\u53ef\u4ee5\u53d1\u9001\u62a5\u6587\u4e4b\u524d\uff0c\u5fc5\u987b\u6709\u5f00\u653e\u7684\u8fde\u63a5\u3002\n\n\u6b64\u65f6\uff0c\u5ba2\u6237\u673a\u7b49\u5f85\u6700\u540e\u8ba8\u8bba\u7684\u54cd\u5e94\uff08\u6765\u81ea\u8fdc\u7a0b\u670d\u52a1\u5668\uff09\u3002\n\n\u7b2c\u56db\u6b65\uff1a\u82e5\u4ece\u5df2\u7ecf\u4ece\u7f51\u7edc\u5f97\u5230\u54cd\u5e94\uff0c\u90a3\u4e48TCP\/IP\u6808\u63a5\u6536\u6570\u636e\uff08\u9690\u853d\u5730\u547c\u53ebm_EventOnStack\u65b9\u6cd5\uff09\u3002\n\n\u5982\u679c\u5df2\u5efa\u7acb\u8fde\u63a5\uff0c\u90a3\u4e48\u8bfbMBAP\u4ee5\u6062\u590d\u8fde\u63a5\u5bf9\u8c61\uff08\u8fde\u63a5\u5bf9\u8c61\u63d0\u4f9b\u5b58\u50a8\u8d44\u6e90\u548c\u5176\u5b83\u4fe1\u606f\uff09\u3002\n\n\u8bfb\u53d6\u6765\u81ea\u7f51\u7edc\u7684\u6570\u636e\uff0c\u901a\u8fc7\u7c7b\u63a5\u53e3CinterfaceIndicationMsg\u5411\u5ba2\u6237\u673a\u53d1\u9001\u8bc1\u5b9e\uff08\u901a\u8fc7m_MODBUSConfirmation\u65b9\u6cd5\uff09\u3002\u5ba2\u6237\u673a\u7684\u4efb\u52a1\u662f\u63a5\u6536MODBUS\u8bc1\u5b9e\uff08\u901a\u8fc7m_ClientReceivingResponse\u65b9\u6cd5\uff09\u3002\n\n\u6700\u540e\uff0c\u5411\u7528\u6237\u5e94\u7528\u5199\u5165\u54cd\u5e94\uff08\u901a\u8fc7m_Writedata\u65b9\u6cd5\uff09\uff0c\u5e76\u4e14\u4e8b\u52a1\u5904\u7406\u8d44\u6e90\u662f\u7a7a\u95f2\u7684\u3002\n\n\u4e0b\u9762\u662fMODBUS\u670d\u52a1\u5668\u4ea4\u6362\u7684\u5b9e\u4f8b\uff1a\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/05\/20240508212902835.png?x-oss-process=image\/resize,m_lfit,w_950,h_950)\n\n\u56fe24\uff1aMODBUS\u670d\u52a1\u5668\u5e8f\u5217\u56fe\n\n\u4e3a\u66f4\u597d\u5730\u7406\u89e3\u5ba2\u6237\u673a\u5e8f\u5217\u56fe\uff0c\u7b80\u5355\u7684\u6ce8\u91ca\u4e3a\uff1a\n\n\u7b2c\u4e00\u6b65\uff1a\u67d0\u5ba2\u6237\u673a\u5df2\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\u4e86\u8be2\u95ee\uff08MODBUS\u8be2\u95ee\uff09\u3002TCP\/IP\u6808\u63a5\u6536\u6570\u636e\uff08\u9690\u853d\u5730\u547c\u53ebm_EventOnSocket\u65b9\u6cd5\uff09\u3002\n\n\u7b2c\u4e8c\u6b65\uff1a\u8bf7\u6c42\u53ef\u80fd\u662f\u8fde\u63a5\u8bf7\u6c42\uff0c\u4e5f\u53ef\u80fd\u4e0d\u662f\u8fde\u63a5\u8bf7\u6c42\uff08\u901a\u8fc7m_IsConnexionRequest\u65b9\u6cd5\uff09\u3002\u5982\u679c\u8bf7\u6c42\u662f\u8fde\u63a5\u8bf7\u6c42\uff0c\u90a3\u4e48\u5206\u914d\u8fde\u63a5\u5bf9\u8c61\u548c\u6536\u53d1MODBUS\u5e27\u7684\u7f13\u51b2\u5668\uff08m_GetObjectConnexion\uff09\u3002\u4e4b\u540e\uff0c\u5fc5\u987b\u68c0\u67e5\u548c\u63a5\u53d7\u8fde\u63a5\u8bbf\u95ee\u63a7\u5236\u3002\n\n\u7b2c\u4e09\u6b65\uff1a\u5982\u679c\u8be2\u95ee\u662fMODBUS\u8bf7\u6c42\uff0c\u90a3\u4e48\u53ef\u4ee5\u8bfb\u51fa\u5b8c\u6574\u7684MODBUS Query\uff08\u901a\u8fc7m_ReceiveData\u65b9\u6cd5\uff09\u3002\u6b64\u65f6\uff0c\u5fc5\u987b\u5206\u6790MBAP\uff08\u901a\u8fc7m_IsMdbHeadercorrect\u65b9\u6cd5\uff09\u3002\u901a\u8fc7CInterfaceIndicationMessaging\u7c7b\u5411\u670d\u52a1\u5668\u4efb\u52a1\uff08task\uff09\u53d1\u9001\u5b8c\u6574\u7684\u5e27\uff08\u901a\u8fc7m_MODBUSIndication\u65b9\u6cd5\uff09\u3002\u670d\u52a1\u5668\u7684\u4efb\u52a1\u662f\u63a5\u6536MODBUS QUERY\uff08\u901a\u8fc7m_ServerReceivingMessage\u65b9\u6cd5\uff09\u5e76\u52a0\u4ee5\u5206\u6790\u3002\n\n\u5982\u679c\u6709\u5dee\u9519\u51fa\u73b0\uff08\u672a\u652f\u6301\u7684\u529f\u80fd\u7801\u7b49\uff09\uff0c\u751f\u6210MODBUS\u5f02\u5e38\u5e27\u5f62\uff08m_BuildMODBUSException\uff09\uff0c\u5426\u5219\u751f\u6210\u54cd\u5e94\u3002\n\n\u7b2c\u56db\u6b65\uff1a\u901a\u8fc7CInterfaceResponseMessaging\uff08\u901a\u8fc7m_MODBUSResponse\u65b9\u6cd5\uff09\u5728\u7f51\u7edc\u4e0a\u53d1\u9001\u54cd\u5e94\u3002\u901a\u8fc7m_SendData\u65b9\u6cd5\u8fdb\u884c\u5bf9\u8fde\u63a5\u5bf9\u8c61\u7684\u5904\u7406\uff08\u6062\u590d\u8fde\u63a5\u63cf\u8ff0\u7b26\u7b49\uff09\uff0c\u5728\u7f51\u7edc\u4e0a\u53d1\u9001\u6570\u636e\u3002\n\n## \u7c7b\u548c\u65b9\u6cd5\u7684\u63cf\u8ff0\n\n### MODBUS\u670d\u52a1\u5668\u7aef\u7684\u7c7b\n\n\u7c7b\u540d\uff1aCMODBUSServer\n\n\u7c7b\u540d\uff1a**CMODBUSServer**\n\n**Stereotype\u5b9e\u73b0\u7c7b**\n\n\u63d0\u4f9b\u7528\u670d\u52a1\u5668\u6a21\u5f0f\u7ba1\u7406MODBUS\u62a5\u6587\u4f20\u8f93\u7684\u65b9\u6cd5\n\n**\u57df\u7efc\u8ff0**protected char[**GlobalState**](CModbusServer.html" \\l "GlobalState)MODBUS\u670d\u52a1\u5668\u7684\u72b6\u6001\n\n**\u6784\u9020\u5668\u7efc\u8ff0**[**CMODBUSServer**](CModbusServer.html" \\l "CModbusServer(TConfigureObject))([TConfigureObject *](TConfigureObject.html) lnkConfigureObject)\u6784\u9020\u5668\uff1a\u751f\u6210\u5185\u90e8\u5bf9\u8c61\n\n**\u65b9\u6cd5\u7efc\u8ff0**protected void[**m_InitServerFunctions**](CModbusServer.html" \\l "m_InitServerFunctions(void))(void )\u4e3a\u586b\u5145\u529f\u80fd\u9635\u5217\u201cm_ServerFunction\u201d\u6570\u5217\u6784\u9020\u5668\u547c\u53eb\u7684\u529f\u80fdbool[**m_Reset**](CModbusServer.html" \\l "m_Reset(void))(void )\u91cd\u65b0\u8bbe\u7f6e\u670d\u52a1\u5668\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u91cd\u65b0\u8bbe\u7f6e\uff0c\u90a3\u4e48\u8fd4\u56de\u80af\u5b9a\u503cint[**m_ServerReceivingMessage**](CModbusServer.html" \\l "m_ServerReceivingMessage(TItemConnexion))([TItemConnexion *](TItemConnexion.html) lnkMODBUS)\u4e0eCindicationMsg\uff1a\uff1am_MODBUSIndication\u7684\u63a5\u53e3\uff0c\u4ee5\u4ece\u7f51\u7edc\u63a5\u6536\u8be2\u95ee\uff0c\u5982\u6709\u95ee\u9898\uff0c\u8fd4\u56de\u5426\u5b9a\u503cbool[**m_Start**](CModbusServer.html" \\l "m_Start(void))(void )\u542f\u52a8\u670d\u52a1\u5668\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u542f\u52a8\uff0c\u8fd4\u56de\u80af\u5b9a\u503cbool[**m_Stop**](CModbusServer.html" \\l "m_Stop(void))(void )\u505c\u6b62\u670d\u52a1\u5668\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u505c\u6b62\uff0c\u8fd4\u56de\u80af\u5b9a\u503cprotected void[**m_tServerMODBUS**](CModbusServer.html" \\l "m_tServerModbus(void))(void )\u670d\u52a1\u5668\u7684MODBUS\u4efb\u52a1..\n\n### MODBUS\u5ba2\u6237\u673a\u7c7b\n\n\u7c7b\u540d\uff1aCMODBUSClient\n\n\u7c7b\u540d\uff1aCMODBUSClient\n\n\u63d0\u4f9b\u7528\u5ba2\u6237\u673a\u6a21\u5f0f\u7ba1\u7406MODBUS\u62a5\u6587\u4f20\u8f93\u7684\u65b9\u6cd5\n\n**Stereotype**\u5b9e\u73b0\u7c7b\n\n\u57df\u7efc\u8ff0protected char**GlobalState**MODBUS\u5ba2\u6237\u673a\u7684\u72b6\u6001\n\n\u6784\u9020\u5668\u7efc\u8ff0**CMODBUSClient**(TConfigureObject * lnkConfigureObject)\u6784\u9020\u5668\uff1a\u751f\u6210\u5185\u90e8\u5bf9\u8c61\uff0c\u542f\u52a80\u53d8\u91cf\n\n\u65b9\u6cd5\u7efc\u8ff0Int**m_ClientReceivingMessage**([TItemConnexion *](TItemConnexion.html) lnkMODBUS)\u4ece\u5e94\u7528\u5c42\u63a5\u6536\u62a5\u6587\u4f20\u8f93\u7684\u63a5\u53e3\uff1a\u547c\u53eb\u8bfb\u6570\u636e\u547c\u53eb\u7684CinterfaceUserApplication::m_Read \u4e3a\u4e8b\u52a1\u5904\u7406\u53d6\u5f97\u5b58\u50a8\u5668\u7684CInterfaceConnexion::m_GetObjectConnexion \u5982\u679c\u6709\u95ee\u9898\uff0c\u90a3\u4e48\u8fd4\u56de\u5426\u5b9a\u503cBool**m_Reset**(\u7a7a\u7684)\u91cd\u65b0\u8bbe\u7f6e\u7ec4\u4ef6\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u91cd\u65b0\u8bbe\u7f6e\uff0c\u8fd4\u56de\u80af\u5b9a\u503cbool**m_Start**(\u7a7a\u7684)\u542f\u52a8\u7ec4\u4ef6\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u542f\u52a8\uff0c\u8fd4\u56de\u80af\u5b9a\u503cbool**m_Stop**(\u7a7a\u7684)\u505c\u6b62\u7ec4\u4ef6\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u505c\u6b62\uff0c\u8fd4\u56de\u80af\u5b9a\u503cprotected \u7a7a\u7684**m_tClientMODBUS**(\u7a7a\u7684)\u5ba2\u6237\u673a\u7684MODBUS\u4efb\u52a1....\n\n### \u63a5\u53e3\u7684\u7c7b\n\n#### \u63a5\u53e3\u6307\u793a\u7c7b\n\n\u7c7b\u540d\uff1aCInterfaceIndicationMsg\n\n\u76f4\u63a5\u5df2\u77e5\u7684\u5b50\u7c7b\n\n[CConnexionMngt](CConnexionMngt.html)\n\n\u7c7b\u540d\uff1a**CInterfaceIndicationMsg**\n\n\u4eceTCP_Management\u5411MODBUS\u670d\u52a1\u5668\u6216\u5ba2\u6237\u673a\u53d1\u9001\u62a5\u6587\u7684\u7c7b\n\nStereotype**\u63a5\u53e3**\n\n\u65b9\u6cd5\u7efc\u8ff0int[**m_MODBUSConfirmation**](CInterfaceIndicationMsg.html" \\l "m_ModbusConfirmation(TItemConnexion))([TItemConnexion *](TItemConnexion.html) lnkObject)\u63a5\u6536\u8fdb\u5165\u54cd\u5e94\u548c\u547c\u53eb\u5ba2\u6237\u673a\u7684\u65b9\u6cd5\uff1a\u901a\u8fc7\u53ef\u7528\u53c2\u8003\u503c\u3001\u62a5\u6587\u6392\u961f\u3001\u8fdc\u7a0b\u8fc7\u7a0b\u547c\u53eb\u7b49, ...int[**m_MODBUSIndication**](CInterfaceIndicationMsg.html" \\l "m_ModbusIndication(TItemConnexion))([TItemConnexion *](TItemConnexion.html) lnkObject)\u8bfb\u8fdb\u5165MODBUS\u8be2\u95ee\u548c\u547c\u53eb\u670d\u52a1\u5668\u7684\u65b9\u6cd5\uff1a\u901a\u8fc7\u53ef\u7528\u53c2\u8003\u503c\u3001\u62a5\u6587\u6392\u961f\u3001\u8fdc\u7a0b\u8fc7\u7a0b\u547c\u53eb\u7b49, ...\n\n#### \u63a5\u53e3\u54cd\u5e94\u7c7b\n\n\u7c7b\u540d\uff1aCInterfaceResponseMsg\n\n\u76f4\u63a5\u5df2\u77e5\u7684\u5b50\u7c7b\uff1a\n\n[CMODBUSClient](CModbusClient.html)\u3001[CMODBUSServer](CModbusServer.html)\n\nclass **CInterfaceResponseMsg**\n\n\u4ece\u5ba2\u6237\u673a\u6216\u670d\u52a1\u5668\u5411TCP_Management\u53d1\u9001\u54cd\u5e94\u6216\u8be2\u95ee\u7684\u7c7b\n\nStereotype**\u63a5\u53e3**\n\n\u65b9\u6cd5\u7efc\u8ff0[TitemConnexion *](TItemConnexion.html)[**m_GetMemoryConnexion**](CInterfaceResponseMsg.html" \\l "m_GetMemoryConnexion(unsigned long))(unsigned long IPDest)\u4ece\u5b58\u50a8\u5e93\u5f97\u5230\u5bf9\u8c61ItemConnexion\uff0c\u5982\u679c\u5b58\u50a8\u4e0d\u5145\u8db3\uff0c\u8fd4\u56de\u503c-1int[**m_MODBUSRequest**](CInterfaceResponseMsg.html" \\l "m_ModbusRequest(TItemConnexion))([TItemConnexion *](TItemConnexion.html) lnkCMODBUS)\u5c06\u8fdb\u5165MODBUS\u8be2\u95ee\u5ba2\u6237\u673a\u5199\u5165ConnexionMngt\u7684\u65b9\u6cd5\uff1a\u901a\u8fc7\u53ef\u7528\u53c2\u8003\u503c\u3001\u62a5\u6587\u6392\u961f\u3001\u8fdc\u7a0b\u8fc7\u7a0b\u547c\u53eb\u7b49, ...int[**m_MODBUSResponse**](CInterfaceResponseMsg.html" \\l "m_ModbusResponse(TItemConnexion))([TItemConnexion *](TItemConnexion.html) lnkObject)\u5c06MODBUS\u670d\u52a1\u5668\u7684\u54cd\u5e94\u5199\u5165ConnexionMngt\u7684\u65b9\u6cd5\uff1a\u901a\u8fc7\u53ef\u7528\u53c2\u8003\u503c\u3001\u62a5\u6587\u6392\u961f\u3001\u8fdc\u7a0b\u8fc7\u7a0b\u547c\u53eb\u7b49, ...\n\n### \u8fde\u63a5\u7ba1\u7406\u7c7b\n\n\u7c7b\u540d\uff1aCConnexionMngt\n\n\u7c7b\u540d\uff1a**CConnexionMngt**\n\n\u7ba1\u7406\u6240\u6709TCP\u8fde\u63a5\u7684\u7c7b\n\n**Stereotype \u5b9e\u73b0\u7c7b**\n\n\u57df\u7efc\u8ff0protected char[**GlobalState**](CConnexionMngt.html" \\l "GlobalState)\u7ec4\u4ef6ConnexionMngt\u7684\u7efc\u5408\u72b6\u6001Int[**NbConnectionSupported**](CConnexionMngt.html" \\l "NbConnectionSupported)\u8fde\u63a5\u7684\u5168\u90e8\u6570\u91cfInt[**NbLocalConnection**](CConnexionMngt.html" \\l "NbLocalConnection)\u672c\u5730\u5ba2\u6237\u673a\u5411\u8fdc\u7a0b\u670d\u52a1\u5668\u5f00\u653e\u7684\u8fde\u63a5\u6570\u91cfInt[**NbRemoteConnection**](CConnexionMngt.html" \\l "NbRemoteConnection)\u8fdc\u7a0b\u5ba2\u6237\u673a\u5411\u672c\u5730\u670d\u52a1\u5668\u5f00\u653e\u7684\u8fde\u63a5\u6570\u91cf\n\n\u6784\u9020\u5668\u7efc\u8ff0[**CconnexionMngt**](CConnexionMngt.html" \\l "CConnexionMngt(TConfigureObject))([TConfigureObject *](TConfigureObject.html) lnkConfigureObject)\u6784\u9020\u5668\uff1a\u751f\u6210\u5185\u90e8\u5bf9\u8c61\u3001\u542f\u52a80\u53d8\u91cf\n\n\u65b9\u6cd5\u7efc\u8ff0int[**m_EventOnSocket**](CConnexionMngt.html" \\l "m_EventOnSocket(void))(\u7a7a\u7684)\u5524\u9192bool[**m_IsConnectionAuthorized**](CConnexionMngt.html" \\l "m_IsConnectionAuthorized(unsigned long))(unsigned long IPAdress)\u5982\u679c\u6388\u6743\u65b0\u8fde\u63a5\uff0c\u8fd4\u56de\u80af\u5b9a\u503cint[**m_ReceiveData**](CConnexionMngt.html" \\l "m_ReceiveData(TItemConnexion))([TItemConnexion *](TItemConnexion.html) lnkConnexion)\u4e0eCTCPConnexion::write\u63a5\u53e3\uff0c\u4ece\u7f51\u7edc\u4e2d\u8bfb\u6570\u636e\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u6709\u95ee\u9898\uff0c\u8fd4\u56de\u5426\u5b9a\u503cbool[**m_Reset**](CConnexionMngt.html" \\l "m_Reset(void))(\u7a7a\u7684)\u91cd\u65b0\u8bbe\u7f6eConnectionMngt\u7ec4\u4ef6\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u91cd\u65b0\u8bbe\u7f6e\uff0c\u8fd4\u56de\u80af\u5b9a\u503cint[**m_SendData**](CConnexionMngt.html" \\l "m_SendData(TItemConnexion))([TItemConnexion *](TItemConnexion.html) lnkConnexion)\u4e3aCTCPConnexion::read\u63a5\u53e3\uff0c\u5411\u7f51\u7edc\u53d1\u9001\u6570\u636e\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u6709\u95ee\u9898\uff0c\u8fd4\u56de\u5426\u5b9a\u503cbool[**m_Start**](CConnexionMngt.html" \\l "m_Start(void))(\u7a7a\u7684)\u542f\u52a8ConnectionMngt\u7ec4\u4ef6\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u542f\u52a8\uff0c\u8fd4\u56de\u80af\u5b9a\u503cbool[**m_Stop**](CConnexionMngt.html" \\l "m_Stop(void))(\u7a7a\u7684)\u505c\u6b62\u7ec4\u4ef6\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u505c\u6b62\uff0c\u8fd4\u56de\u80af\u5b9a\u503c\n\n---\n*modbus.cn*\n"