"# \u4e24\u53f0S7-1200 PLC\u4e4b\u95f4\u7684Modbus TCP\u901a\u4fe1\n\n> 2024-01-02 | 2024-01-02\n> https:\/\/www.modbus.cn\/en\/26414.html\n\n**\u5de5\u4e1a\u7269\u8054\u7f51**\n\n---\n\n## \u6982\u8ff0\n\n\u5728\u81ea\u52a8\u5316\u548c\u63a7\u5236\u7cfb\u7edf\u4e2d\uff0cModbus TCP\u534f\u8bae\u88ab\u5e7f\u6cdb\u7528\u4e8ePLC\u4e4b\u95f4\u7684\u901a\u4fe1\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u5982\u4f55\u5728\u4e24\u53f0S7-1200 PLC\u4e4b\u95f4\u5b9e\u73b0Modbus TCP\u901a\u4fe1\uff0c\u91cd\u70b9\u4ecb\u7ecd\u5ba2\u6237\u7aef\u7684\u7f16\u7a0b\u548c\u901a\u4fe1\u8fc7\u7a0b\u3002\n\n## \u5b9e\u9a8c\u73af\u5883\u8bbe\u7f6e\n\n- **\u64cd\u4f5c\u7cfb\u7edf**: WIN7 SP1 \u4e13\u4e1a\u7248 64 \u4f4d\n\n- **\u7f16\u7a0b\u8f6f\u4ef6**: STEP 7 Professional V13 SP1 Update 5\n\n- **\u7cfb\u7edf\u786c\u4ef6**: CPU1212C 6ES7212-1AE40-0XB0 V4.1 \u548c CPU1215C 6ES7215-1AG40-0XB0 V4.1\n\n## Modbus TCP\u901a\u4fe1\u57fa\u672c\u914d\u7f6e\n\n- **\u5ba2\u6237\u7aef**: CPU 1212C\n\n- **\u670d\u52a1\u5668**: CPU 1215C\n\n- **IP \u5730\u5740**: \u5ba2\u6237\u7aef 192.168.0.6, \u670d\u52a1\u5668 192.168.0.4\n\n- **\u7aef\u53e3\u53f7**: \u5ba2\u6237\u7aef 0 \u670d\u52a1\u7aef 502\n\n- **\u786c\u4ef6\u6807\u8bc6\u7b26**: 64\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/01\/20240102000539487.png?x-oss-process=image\/resize,m_lfit,w_950,h_330)\n\n\u786c\u4ef6\u6807\u8bc6\u7b26\u662f\u5728\u201c\u8bbe\u5907\u7ec4\u6001\u201d\u4e2d\uff0c\u53cc\u51fbPROFINET \u63a5\u53e3\uff0c\u7136\u540e\u5728\u201c\u5c5e\u6027\u4e2d\u7684\u201c\u786c\u4ef6\u6807\u8bc6\u7b26\u201d\u4e2d\u67e5\u770b\u3002\n\n## S7-1200\u4f5c\u4e3a\u5ba2\u6237\u7aef\u7684\u7f16\u7a0b\u53ca\u901a\u4fe1\u8fc7\u7a0b\n\n- S7-1200 \u5ba2\u6237\u7aef\u4fa7\u9700\u8981\u8c03\u7528 MB CLIENT \u6307\u4ee4\u5757\u3002\n\n- \u8be5\u6307\u4ee4\u5757\u4e3b\u8981\u5b8c\u6210\u5ba2\u6237\u673a\u548c\u670d\u52a1\u5668\u7684 TCP \u8fde\u63a5\u3001\u53d1\u9001\u547d\u4ee4\u6d88\u606f\u63a5\u6536\u54cd\u5e94\u4ee5\u53ca\u63a7\u5236\u670d\u52a1\u5668\u65ad\u5f00\u7684\u5de5\u4f5c\u4efb\u52a1\u3002\n\n## \u8c03\u7528 MB_CLIENT\n\n\u5c06MB_CLIENT \u6307\u4ee4\u5757\u5728\u7a0b\u5e8f\u5757>OB1\u201d\u4e2d\u7a0b\u5e8f\u6bb5\u91cc\u8c03\u7528\uff0c\u8c03\u7528\u65f6\u4f1a\u81ea\u52a8\u751f\u6210\u80cc\u666f DB\uff0c\u70b9\u51fb\u786e\u5b9a\u5373\u53ef\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/01\/20240102000751620.png)\n\n**MB_CLIENT \u5404\u811a\u5b9a\u4e49:**\n\n- REQ: \u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u8bf7\u6c42,\u4e0a\u5347\u6cbf\u6709\u6548\u3002\n\n- DISCONNECT: \u901a\u8fc7\u8be5\u53c2\u6570,\u53ef\u4ee5\u63a7\u5236\u4e0eModbusTCP\u670d\u52a1\u5668\u5efa\u7acb\u548c\u7ec8\u6b62\u8fde\u63a5\u30020:\u5efa\u7acb\u8fde\u63a5;1:\u65ad\u5f00\u8fde\u63a5\u3002\n\n- MB MODE: \u9009\u62e9Modbus\u8bf7\u6c42\u6a21\u5f0f(\u8bfb\u53d6\u3001\u5199\u5165\u6216\u8bca\u65ad)\u3002\n\n- MB_DATA_ADDR: \u7531\"MB_CLIENT\u201c\u6307\u4ee4\u6240\u8bbf\u95ee\u6570\u636e\u7684\u8d77\u59cb\u5730\u5740\u3002\n\n- MB DATA LEN:\u6570\u636e\u957f\u5ea6:\u6570\u636e\u8bbf\u95ee\u7684\u4f4d\u6216\u5b57\u7684\u4e2a\u6570\u3002\n\n- MB_DATA_PTR: \u6307\u5411Modbus\u6570\u636e\u5bc4\u5b58\u5668\u7684\u6307\u9488\u3002\n\n- CONNECT:\u6307\u5411\u8fde\u63a5\u63cf\u8ff0\u7ed3\u6784\u7684\u6307\u9488\u3002\u4f7f\u7528TCON_IP_v4\u6570\u636e\u7c7b\u578b\u3002\n\n- DONE: \u6700\u540e\u4e00\u4e2a\u4f5c\u4e1a\u6210\u529f\u5b8c\u6210,\u7acb\u5373\u5c06\u8f93\u51fa\u53c2\u6570DONE\u7f6e\u4f4d\u4e3a\"1\"\u3002\n\n- BUSY:\u4f5c\u4e1a\u72b6\u6001\u4f4d:0:\u65e0\u6b63\u5728\u5904\u7406\u7684\"MB_CLIENT\"\u4f5c\u4e1a;1:\"MBCLIENT'\u4f5c\u4e1a\u6b63\u5728\u5904\u7406\u3002\n\n- ERROR:\u9519\u8bef\u4f4d: 0:\u65e0\u9519\u8bef:1:\u51fa\u73b0\u9519\u8bef,\u9519\u8bef\u539f\u56e0\u67e5\u770bSTATUS\u3002\n\n- STATUS: \u6307\u4ee4\u7684\u8be6\u7ec6\u72b6\u6001\u4fe1\u606f\u3002\n\n## CONNECT \u5f15\u811a\u7684\u6307\u9488\u7c7b\u578b\n\n**\u521b\u5efaTCON_IP_v4\u7ed3\u6784**: \n\n- \u9700\u8981\u521b\u5efa\u4e00\u4e2a**\u5168\u5c40\u6570\u636e\u5757 DB2**\uff0c\u5e76\u5728\u5176\u4e2d\u5b9a\u4e49TCON IP v4\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u901a\u4fe1\u914d\u7f6e\u3002\n\n- \u53cc\u51fb\u6253\u5f00 DB2\uff0c\u5b9a\u4e49\u53d8\u91cf\u540d\u79f0\u4e3a\u201caa\u201d\uff0c\u6570\u636e\u7c7b\u578b\u4e3aTCON IP v4\u201d (\u53ef\u5c06 TCON IP V4 \u62f7\u8d1d\u5230\u5bf9\u8bdd\u6846\u4e2d) ;\n\n- \u70b9\u51fb\u201c\u56de\u8f66\u201d\u6309\u952e\uff0c\u8be5\u6570\u636e\u7c7b\u578b\u7ed3\u6784\u521b\u5efa\u5b8c\u6bd5\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/01\/20240102001247925.png?x-oss-process=image\/resize,m_lfit,w_950,h_505)\n\nTCON IP v4\u6570\u636e\u7ed3\u6784\u7684\u5f15\u811a\u5b9a\u4e49\u8bf4\u660e\u5982\u4e0b:\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/01\/20240102001349403.png?x-oss-process=image\/resize,m_lfit,w_950,h_460)\n\n**\u6ce8\u610f:**\n\n- CONNECT\u5f15\u811a\u7684\u586b\u5199\u9700\u8981\u7528**\u7b26\u53f7\u5bfb\u5740**\u7684\u65b9\u5f0f\n\n- TCON_IP_v4 \u662f\u7cfb\u7edf\u6570\u636e\u7c7b\u578b\uff0c\u4e0d\u662f\u5728 PLC \u6570\u636e\u7c7b\u578b\u4e2d\u521b\u5efa\n\n- LocalPort \u4e00\u822c\u4f7f\u7528**\u9ed8\u8ba4\u503c 0**\uff0c\u610f\u601d\u662f\u672c\u5730\u4f7f\u7528\u968f\u673a\u7aef\u53e3\n\n## \u521b\u5efa MB_DATA_PTR \u6570\u636e\u7f13\u51b2\u533a\n\n1.\u521b\u5efa\u4e00\u4e2a\u5168\u5c40\u6570\u636e\u5757 DB3\uff0c\u521b\u5efa\u65b9\u6cd5\u53ef\u4ee5\u53c2\u8003\u56fe 2\uff0c\u8fde\u540c\u4e0a\u6b65\u521b\u5efa\u7684 DB2 \u4f4d\u4e8e CPU \u7a0b\u5e8f\u5757\u4e2d;\n\n\u751f\u6210\u7684\u4e24\u4e2a DB \u5757\u540d\u79f0:\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/01\/20240102001724513.png)\n\n2.\u5efa\u7acb\u4e00\u4e2a Word \u6570\u7ec4\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4ee5\u4fbf\u901a\u4fe1\u4e2d\u5b58\u653e\u6570\u636e;MB_DATA_PTR \u6570\u636e\u7f13\u51b2\u533a\u7ed3\u6784:\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/01\/20240102001830672.png)\n\n**\u6ce8\u610f**\n\n- \u6307\u5b9a\u7684\u6570\u636e\u7f13\u51b2\u533a\u53ef\u4e3a DB \u5757\u6216M\u5b58\u50a8\u533a\u5730\u5740\u4e2d;\n\n- DB \u5757\u53ef\u4e3a\u4f18\u5316\u7684\u6570\u636e\u5757\uff0c\u4e5f\u53ef\u4e3a\u6807\u51c6\u7684\u6570\u636e\u5757\u7ed3\u6784;\n\n- \u82e5\u4e3a\u4f18\u5316\u7684\u6570\u636e\u5757\u7ed3\u6784\uff0c\u5fc5\u987b\u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6570\u7ec4;\n\n- \u82e5\u4e3a\u6807\u51c6\u7684\u6570\u636e\u5757\u7ed3\u6784\uff0c\u4ee5\u6307\u9488\u7684\u65b9\u5f0f\u586b\u5199\u8be5\u5f15\u811a;\n\n- MB_DATA_PTR \u6307\u5b9a\u7684\u6570\u636e\u7f13\u51b2\u533a\u5fc5\u987b\u8db3\u591f\u5927\uff0c\u81f3\u5c11\u8fbe\u5230MB_DATA_LEN \u4e2a\u4f4d (\u8bbf\u95ee\u8f93\u5165\u4f4d\u3001\u8f93\u51fa\u4f4d\u65f6) \u6216\u5b57 (\u8bbf\u95ee\u4fdd\u6301\u5bc4\u5b58\u5668\u3001\u8f93\u5165\u5b57\u65f6) ;\n\n- \u672c\u6587\u4ee5\u6807\u51c6\u7684\u6570\u636e\u5757 (\u9ed8\u8ba4) \u4e3a\u4f8b\u8fdb\u884c\u7f16\u7a0b\u3002\n\n**\u4fee\u6539DB\u5757\u5c5e\u6027\u4e3a\u6807\u51c6\u7684\u5757\u7ed3\u6784:**\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/01\/20240102002024597.png)\n\n## \u5ba2\u6237\u7aef\u4fa7\u5b8c\u6210\u6307\u4ee4\u5757\u7f16\u7a0b\n\n\u8c03\u7528 MB_CLIENT \u6307\u4ee4\u5757\uff0c\u4f7f\u7528\u529f\u80fd\u7801 03 \u4ece\u670d\u52a1\u5668\u4e2d\u8bfb\u53d6 2\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u7684\u503c\uff0cMB_MODE =0\uff0cMB_DATA_ADDR =40001\uff0cMB_DATA_LEN =2\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/01\/20240102002205137.png?x-oss-process=image\/resize,m_lfit,w_950,h_668)\n\n\u6ce8\u610f:\n\n- \u5bf9\u4e8e\u672c\u4f8b\u6765\u8bf4\uff0c\u4f19\u4f34\u662f\u53e6\u4e00\u4e2a S7-1200\uff0c\u5b9e\u9645\u4e0a\u4e5f\u53ef\u6362\u505a\u4efb\u610f\u652f\u6301 Modbus TCP \u670d\u52a1\u5668\u7684\u8bbe\u5907\uff0c\u53ea\u9700\u5728\u53c2\u6570\u5f15\u811a\u8bbe\u7f6e\u5408\u9002\u503c\uff0c\u5e76\u5728 CONNECT \u8bbe\u7f6e\u6b63\u786e\u901a\u4fe1\u53c2\u6570\u5373\u53ef\u3002\n\n- \u5982\u679c S7-1200\u4f5c\u4e3a Modbus TCP \u5ba2\u6237\u7aef\u9700\u8981\u540c\u65f6\u8fde\u63a5\u591a\u4e2a Modbus TCP \u670d\u52a1\u5668\uff0c\u90a3\u4e48\u9700\u8981\u4f7f\u7528\u591a\u4e2a MB_CLIENT;\n\n- \u5982\u679c\u4e00\u4e2a Modbus TCP \u8fde\u63a5\u91cc\u6709\u591a\u4e2a\u901a\u4fe1\u4f5c\u4e1a\uff0c\u4e14\u6bcf\u4e2a\u4f5c\u4e1a\u8c03\u7528\u4e00\u6b21 MB_CLIENT \uff0c\u90a3\u4e48\u6bcf\u6b21\u8c03\u7528\u5fc5\u987b\u4f7f\u7528\u76f8\u540c\u7684\u80cc\u666f\u6570\u636e\u5757\uff0cCONNECT \u4e5f\u4f7f\u7528\u76f8\u540c\u7684\u53c2\u6570\n\n## \u4e0b\u8f7d\u4e0e\u6d4b\u8bd5\n\n\u5b8c\u6210\u7f16\u7a0b\u540e\uff0c\u5c06\u6574\u4e2a\u9879\u76ee\u4e0b\u8f7d\u5230S7-1200 PLC\u3002\u5728\u670d\u52a1\u5668\u4fa7\u51c6\u5907\u5c31\u7eea\u540e\uff0c\u901a\u8fc7\u89e6\u53d1MB CLIENT\u6307\u4ee4\u5757\u7684REQ\u5f15\u811a\u7684\u4e0a\u5347\u6cbf\u6765\u542f\u52a8\u901a\u4fe1\u3002\u8bfb\u53d6\u5230\u7684\u6570\u636e\u5c06\u88ab\u5b58\u653e\u5728MBDATA PTR\u5f15\u811a\u6307\u5b9a\u7684DB\u5757\u53d8\u91cf\u4e2d\u3002\n\n## \u7ed3\u8bba\n\n\u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u4e24\u53f0S7-1200 PLC\u4e4b\u95f4\u7684Modbus TCP\u901a\u4fe1\u53ef\u4ee5\u88ab\u6210\u529f\u5b9e\u73b0\u3002\u5ba2\u6237\u7aef\u7684\u7f16\u7a0b\u6d89\u53ca\u5230\u8be6\u7ec6\u7684\u6307\u4ee4\u5757\u914d\u7f6e\u548c\u6570\u636e\u7ed3\u6784\u7684\u5b9a\u4e49\uff0c\u8fd9\u5bf9\u4e8e\u5b9e\u73b0\u9ad8\u6548\u4e14\u53ef\u9760\u7684\u901a\u4fe1\u81f3\u5173\u91cd\u8981\u3002\u8fd9\u79cd\u901a\u4fe1\u65b9\u6cd5\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u4e2d\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u4e3a\u8bbe\u5907\u95f4\u7684\u6570\u636e\u4ea4\u6362\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7a33\u5b9a\u7684\u5e73\u53f0\u3002\n\n---\n*modbus.cn*\n"