"# \u6bd4\u8f83\u8be6\u7ec6\u7684\u89e3\u8bfb\u4ec0\u4e48\u662fModbus\n\n> 2022-03-15 | 2026-07-01\n> https:\/\/www.modbus.cn\/en\/6714.html\n\n**Modbus \u534f\u8bae\u6807\u51c6**\n\n---\n\nModbus\u662f\u4ec0\u4e48\uff1f\n\n**Modbus\u534f\u8bae**\uff0c\u4ece\u5b57\u9762\u7406\u89e3\u5b83\u5305\u62ec**Mod**\u548c**Bus**\u4e24\u90e8\u5206\uff0c\u9996\u5148\u5b83\u662f\u4e00\u79cd**bus**\uff0c\u5373\u603b\u7ebf\u534f\u8bae\uff0c\u548cI2C\u3001SPI\u7c7b\u4f3c\uff0c\u603b\u7ebf\u5c31\u610f\u5473\u7740\u6709\u4e3b\u673a\uff0c\u6709\u4ece\u673a\uff0c\u8fd9\u4e9b\u8bbe\u5907\u5728\u540c\u4e00\u6761\u603b\u7ebf\u4e0a\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/modbus2-950x303.png)\n\nModbus\u652f\u6301\u5355\u4e3b\u673a\uff0c\u591a\u4e2a\u4ece\u673a\uff0c\u6700\u591a\u652f\u6301247\u4e2a\u4ece\u673a\u8bbe\u5907\u3002\u5173\u4e8e**Mod**\uff0c\u56e0\u4e3a\u8fd9\u79cd\u534f\u8bae\u6700\u65e9\u88ab\u7528\u5728PLC\u63a7\u5236\u5668\u4e2d\uff0c\u51c6\u786e\u7684\u8bf4\u662f**Modicon**\u516c\u53f8\u7684PLC\u63a7\u5236\u5668\uff0c\u8fd9\u4e5f\u662f**Mod-Bus**\u540d\u79f0\u7684\u7531\u6765\u3002\n\n\u540e\u6765Modicon\u88ab\u65bd\u8010\u5fb7\uff08Schneider\uff09\u6536\u8d2d\uff0cModbus\u534f\u8bae\u5e7f\u6cdb\u5e94\u7528\u5728\u5de5\u4e1a\u63a7\u5236\u5668\u3001HMI\u548c\u4f20\u611f\u5668\u4e0a\uff0c\u9010\u6e10\u88ab\u5176\u4ed6\u5382\u5546\u6240\u63a5\u53d7\uff0c\u6210\u4e3a\u4e86\u4e00\u79cd\u4e3b\u6d41\u7684\u901a\u8baf\u534f\u8bae\uff0c\u7528\u4e8e\u548c\u5916\u56f4\u8bbe\u5907\u8fdb\u884c\u901a\u8baf\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031603233737-950x640.png)Modbus\u7f51\u7edc\u4f53\u7cfb\n\nModbus\u5728**7\u5c42OSI\u53c2\u8003\u6a21\u578b**\u4e2d\u5c5e\u4e8e\u7b2c\u4e03\u5c42\u5e94\u7528\u5c42\uff0c\u6570\u636e\u94fe\u8def\u5c42\u6709\u4e24\u79cd\uff1a\u57fa\u4e8e\u6807\u51c6\u4e32\u53e3\u534f\u8bae\u548cTCP\u534f\u8bae\uff0c\u7269\u7406\u5c42\u53ef\u4f7f\u75283\u7ebf232\u30012\u7ebf485\u30014\u7ebf422\uff0c\u6216\u5149\u7ea4\u3001\u7f51\u7ebf\u3001\u65e0\u7ebf\u7b49\u591a\u79cd\u4f20\u8f93\u4ecb\u8d28\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/ISOOSI-950x447.png)ISO\/OSI\u6a21\u578b\n\nModbus\u534f\u8bae\u662f\u4e00\u79cd**\u8bf7\u6c42\/\u5e94\u7b54**\u65b9\u5f0f\u7684\u4ea4\u4e92\u8fc7\u7a0b\uff0c\u4e3b\u673a\u4e3b\u52a8\u53d1\u8d77\u901a\u8baf\u8bf7\u6c42\uff0c\u4ece\u673a\u54cd\u5e94\u4e3b\u673a\u7684\u8bf7\u6c42\uff0c\u4ece\u673a\u5728\u6ca1\u6709\u6536\u5230\u4e3b\u673a\u7684\u8bf7\u6c42\u65f6\uff0c\u4e0d\u4f1a\u4e3b\u52a8\u53d1\u9001\u6570\u636e\uff0c\u4ece\u673a\u4e4b\u95f4\u4e0d\u4f1a\u8fdb\u884c\u901a\u8baf\u3002\n\n**\u5c31\u50cf\u662f\u7537\u751f\u8ffd\u5973\u751f\u4e00\u6837\uff0c\u7537\u751f\u8981\u4e3b\u52a8\u51fa\u51fb\uff0c\u5973\u751f\u624d\u4f1a\u7ed9\u4f60\u54cd\u5e94\uff0c\u4e0d\u80fd\u7b49\u7740\u5973\u751f\u4e3b\u52a8\u642d\u8baa\u4f60\u3002**\n\n\u76ee\u524d\u6bd4\u8f83\u6743\u5a01\u7684**Modbus\u5b98\u65b9\u6807\u51c6\u6587\u6863**\u6709\u4e24\u4e2a\uff1a\n\n- **modbus_application_protocol_specification_v1.1b3.pdf**\n\n- **\u57fa\u4e8eModbus\u534f\u8bae\u7684\u5de5\u4e1a\u81ea\u52a8\u5316\u7f51\u7edc\u89c4\u8303 GB-T19582.1-2008.pdf**\n\n\u53ef\u4ee5\u8bf490%\u7684\u4e66\u7c4d\u548c\u7f51\u7edc\u8d44\u6599\u90fd\u662f\u7ffb\u8bd1\u81ea\u8fd9\u4e24\u7bc7\u6587\u6863\uff0c**\u6587\u672b\u83b7\u53d6\u6807\u51c6\u6587\u6863\u4e0b\u8f7d\u65b9\u6cd5**\u3002\n\n### 4\u79cd\u6570\u636e\u7c7b\u578b\n\nModbus\u534f\u8bae\u89c4\u5b9a\uff0c\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u6309\u7167\u8bfb\u5199\u5c5e\u6027\u548c\u7c7b\u578b\u53ef\u5206\u4e3a\u4ee5\u4e0b4\u79cd\uff1a\n\n- \u79bb\u6563\u91cf\u8f93\u5165\uff08Discretes Input \u00a0\uff09\uff1a1\u4f4d\uff0c\u53ea\u8bfb\n\n- \u7ebf\u5708\uff08Coils\uff09\uff1a1\u4f4d\uff0c\u8bfb\u5199\n\n- \u8f93\u5165\u5bc4\u5b58\u5668\uff08Input Registers \u00a0\uff09\uff1a16\u4f4d\uff0c\u53ea\u8bfb\n\n- \u4fdd\u6301\u5bc4\u5b58\u5668\uff08Holding Registers\uff09\uff1a16\u4f4d\uff0c\u8bfb\u5199\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031604072744-950x229.png)Modbus\u6570\u636e\u7c7b\u578b\n\n### 3\u79cd\u4f20\u8f93\u6a21\u5f0f\n\n1979\u5e74\uff0cModicon \u9996\u5148\u63a8\u51fa\u4e86\u4e32\u884cModbus\u6807\u51c6\uff0c\u540e\u6765\u7531\u4e8e\u7f51\u7edc\u7684\u666e\u53ca\uff0c\u9700\u8981\u66f4\u9ad8\u7684\u4f20\u8f93\u901f\u5ea6\uff0c1997\u5e74\u5236\u5b9a\u4e86\u57fa\u4e8eTCP\u7f51\u7edc\u7684Modbus\u6807\u51c6\u3002\n\n\u6240\u4ee5\u603b\u7684\u53ef\u5206\u4e3a\u4e24\u4e2a\u4f20\u8f93\u6a21\u5f0f\uff1a\u57fa\u4e8e**\u4e32\u884c\u94fe\u8def**\u7684\u548c\u57fa\u4e8e**\u4ee5\u592a\u7f51TCP\/IP**\u7684\u3002\u4f46\u662f\u6211\u4e2a\u4eba\u8fd8\u662f\u4e60\u60ef\u5206\u4e3a3\u79cd\u4f20\u8f93\u6a21\u5f0f\uff1a\n\n- **\u57fa\u4e8e\u4e32\u53e3\u7684Modbus-RTU**\u6570\u636e\u6309\u7167\u6807\u51c6\u4e32\u53e3\u534f\u8bae\u8fdb\u884c\u7f16\u7801\uff0c\u662f\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684\u4e00\u79cdModbus\u534f\u8bae\uff0c\u91c7\u7528CRC-16_Modbus\u6821\u9a8c\u7b97\u6cd5\u3002\n\n- **\u57fa\u4e8e\u4e32\u53e3\u7684Modbus-ASCII**\u6240\u6709\u6570\u636e\u90fd\u662fASCII\u683c\u5f0f\uff0c\u4e00\u4e2a\u5b57\u8282\u7684\u539f\u59cb\u6570\u636e\u9700\u8981\u4e24\u4e2a\u5b57\u7b26\u6765\u8868\u793a\uff0c\u6548\u7387\u4f4e\uff0c\u91c7\u7528LRC\u6821\u9a8c\u7b97\u6cd5\u3002\n\n- **\u57fa\u4e8e\u7f51\u53e3\u7684Modbus-TCP**Modbus-TCP\u57fa\u4e8eTCP\/IP\u534f\u8bae\uff0c\u5360\u7528**502\u7aef\u53e3**\uff0c\u6570\u636e\u5e27\u4e3b\u8981\u5305\u62ec\u4e24\u90e8\u5206\uff1aMBAP\uff08\u62a5\u6587\u5934\uff09+PDU\uff08\u5e27\u7ed3\u6784\uff09\uff0c\u6570\u636e\u5757\u4e0e\u4e32\u884c\u94fe\u8def\u662f\u4e00\u81f4\u7684\u3002\n\n\u6240\u4ee5\u5f53\u6211\u4eec\u63d0\u53caModbus\u534f\u8bae\u65f6\uff0c\u8981\u786e\u5b9a\u662f\u54ea\u79cd\u6a21\u5f0f\uff1aRTU\u3001ASCII\u6216TCP\uff0c3\u79cd\u6a21\u5f0f\u533a\u522b\u8fd8\u662f\u5f88\u5927\u7684\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/MBXY-CR-accffe88d3264d6131b29f22efc4593f.png)Modbus\u4f20\u8f93\u6a21\u5f0f\u5e94\u7528\n\n\u6709\u4e9b\u8bbe\u5907\u652f\u6301\u591a\u79cdModbus\u6a21\u5f0f\uff0c\u6709\u4e9b\u8bbe\u5907\u53ea\u652f\u6301\u5176\u4e2d\u4e00\u79cd\uff0c\u6bd4\u5982\u6700\u5e38\u7528\u7684PLC S7-200\u53ea\u652f\u6301Modbus RTU\u534f\u8bae\uff0c\u4e0d\u652f\u6301Modbus ASCII\u534f\u8bae\uff0cModbus\u603b\u7ebf\u4e0a\u6240\u6709\u7684\u8bbe\u5907**\u4f20\u8f93\u6a21\u5f0f\u5fc5\u987b\u76f8\u540c**\u3002\n\n\u5b9e\u9645\u4f7f\u7528\u8981\u6839\u636e\u8bbe\u5907\u4f7f\u7528\u624b\u518c\u6765\u9009\u62e9\u91c7\u7528\u54ea\u79cd\u6a21\u5f0f\u3002\n\n### 3\u7c7b\u529f\u80fd\u7801\n\nModbus\u529f\u80fd\u7801\uff0c\u662f\u5199\u5728\u4e3b\u673a\u8bf7\u6c42\u6570\u636e\u5e27\u4e2d\u7684\uff0c\u51b3\u5b9a\u4e3b\u673a\u8fdb\u884c\u8bfb\u8fd8\u662f\u5199\u64cd\u4f5c\uff0c\u662f\u8bfb\u7ebf\u5708\u3001\u79bb\u6563\u91cf\u8fd8\u662f\u5bc4\u5b58\u5668\uff0c\u662f\u5199\u5355\u4e2a\u5bc4\u5b58\u5668\u8fd8\u662f\u591a\u4e2a\u5bc4\u5b58\u5668\u7b49\u7b49\uff0c\u51b3\u5b9a\u4e3b\u673a\u8bf7\u6c42\u4ec0\u4e48\u7c7b\u578b\u7684\u6570\u636e\u3002\n\n\u4e3b\u8981\u5305\u62ec3\u7c7b\u529f\u80fd\u7801\uff1a**\u516c\u5171\u529f\u80fd\u7801\u3001\u7528\u6237\u5b9a\u4e49\u529f\u80fd\u7801\u548c\u4fdd\u7559\u529f\u80fd\u7801**\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031603352299-950x720.png)Modbus\u529f\u80fd\u7801\n\n\u5b9e\u9645\u6700\u5e38\u7528\u7684\u662f\u516c\u5171\u529f\u80fd\u7801\u4e2d\u76844\u4e2a\u529f\u80fd\u7801\uff1a03\/04\/06\/10\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031603555988-950x729.png)\u516c\u5171\u529f\u80fd\u7801\n\n- 0x03\uff1a\u8bfb\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\n\n- 0x04\uff1a\u8bfb\u8f93\u5165\u5bc4\u5b58\u5668\n\n- 0x06\uff1a\u5199\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\n\n- 0x10\uff1a\u5199\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\n\n\u56e0\u4e3aPLC\u4e3b\u8981\u63a7\u5236\u7684\u662f\u7ee7\u7535\u5668\u89e6\u70b9\uff0c\u6240\u4ee5\u5728PLC\u4e0a\u8fd8\u4f1a\u7ecf\u5e38\u5bf9\u7ebf\u5708\uff08Coils\uff09\u8fdb\u884c\u8bfb\u5199\u3002\n\n\u8fd9\u91cc\u9700\u8981**\u7279\u522b\u6ce8\u610f**\u7684\u4e00\u70b9\u662f\uff1a\u5199\u4fdd\u6301\u5bc4\u5b58\u5668\uff0c\u9700\u8981\u533a\u52060x06\u5199\u5355\u4e2a\u5bc4\u5b58\u5668\u548c0x10\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\uff0c\u800c\u8bfb\u4fdd\u6301\u5bc4\u5b58\u5668\u4e0d\u533a\u5206\u8bfb\u5355\u4e2a\u548c\u8bfb\u591a\u4e2a\uff0c\u5f53\u9700\u8981\u8bfb\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u65f6\uff0c\u4e5f\u662f\u4f7f\u75280x03\u6307\u4ee4\uff0c\u6307\u5b9a\u8bfb\u53d6\u6570\u91cf\u4e3a1\u3002\n\n### \u6570\u636e\u5e27\u683c\u5f0f\n\n\u65e0\u8bba\u662f3\u79cd\u4f20\u8f93\u6a21\u5f0f\u4e2d\u7684\u54ea\u4e00\u79cd\uff0cModbus\u5e27\u683c\u5f0f\u90fd\u662f\u4e00\u6837\u7684\uff1a\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031602563971-950x166.png)Modbus\u6570\u636e\u5e27\n\n\u4e3b\u8981\u5305\u62ec\uff1a\n\n- \u5730\u5740\u57df\uff1a1\u5b57\u8282\uff0c\u5373\u4ece\u673a\u8bbe\u5907\u5730\u5740\uff0c\u901a\u5e381-247\u4e3a\u6709\u6548\u5730\u5740\uff0c0\u4e3a\u5e7f\u64ad\u5730\u5740\n\n- \u529f\u80fd\u7801\uff1a1\u5b57\u8282\uff0c\u8868\u660e\u4e3b\u673a\u8bf7\u6c42\u6570\u636e\u7684\u7c7b\u578b\u3002\n\n- \u6570\u636e\uff1aN\u5b57\u8282\uff0c\u5305\u542b\u5bc4\u5b58\u5668\u5730\u5740\u548c\u5bc4\u5b58\u5668\u6570\u636e\u7b49\u3002\n\n- \u5dee\u9519\u6821\u9a8c\uff1a\u5bf9\u6570\u636e\u8fdb\u884c\u5197\u4f59\u6821\u9a8c\u7684\u7ed3\u679c\uff0cCRC\u6216LRC\n\n\u4e0b\u9762\u6765\u8be6\u7ec6\u4ecb\u7ecd\u4e00\u4e0b\u6bcf\u79cd\u4f20\u8f93\u6a21\u5f0f\u7684\u6570\u636e\u5e27\u683c\u5f0f\u3002\n\n#### **Modbus-RTU\u6570\u636e\u5e27**\n\nModbus-RTU\u6570\u636e\u5e27\uff0c\u5e27\u957f\u5ea6\u6700\u5927\u4e3a256\u5b57\u8282\uff0c\u7531\u4ee5\u4e0b4\u90e8\u5206\u6784\u6210\uff1a\n\n- \u5b50\u8282\u70b9\u5730\u5740\uff1a1\u5b57\u8282\uff0c\u8303\u56f40-247\n\n- \u529f\u80fd\u4ee3\u7801\uff1a1\u5b57\u8282\n\n- \u6570\u636e\u5757\uff1a0-252\u5b57\u8282\n\n- CRC\u6821\u9a8c\u503c\uff1a2\u5b57\u8282\uff0c\u4f4e8\u4f4d\u5728\u524d\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031511280844-950x315.png)ModbusRTU\u6570\u636e\u5e27\u683c\u5f0f\n\nModbus-RTU\u5e27\u95f4\u9694\uff0cModbus-RTU\u8981\u6c42\u4e24\u4e2aRTU\u62a5\u6587\u5e27\u95f4\u9694\u8981\u5927\u4e8e3.5\u4e2a\u5b57\u8282\u65f6\u95f4\uff1a\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031511094574-950x409.png)ModbusRTU\u5e27\u95f4\u9694\n\n\u4e14\u6bcf\u4e2a\u62a5\u6587\u5e27\u5185\u5b57\u8282\u95f4\u9694\u5c0f\u4e8e1.5\u4e2a\u5b57\u8282\u65f6\u95f4\uff0c\u5426\u5219\u4f1a\u8ba4\u4e3a\u63a5\u6536\u4e0d\u5b8c\u6574\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031511100963-950x252.png)ModbusRTU\u5e27\u5185\u5b57\u7b26\u95f4\u9694\n\nModbus-RTU\u91c7\u7528\u5faa\u73af\u5197\u4f59\u6821\u9a8c (CRC - Cyclical Redundancy Checking) \u7b97\u6cd5\u5bf9\u62a5\u6587\u5e27\u5168\u90e8\u6570\u636e\u8fdb\u884c\u8ba1\u7b97\uff0c\u5f97\u5230\u7684\u6821\u9a8c\u503c\u9644\u52a0\u5728\u62a5\u6587\u5e27\u672b\u5c3e\uff0c\u4f4e\u4f4d\u5728\u524d\u3002CRC-16_Modbus\u8ba1\u7b97\u65b9\u6cd5\u53ef\u4ee5\u53c2\u8003\uff1aCRC-16_Modbus\u6821\u9a8c\u7b97\u6cd5\n\n\u5b9e\u9645\u8bf7\u6c42\/\u5e94\u7b54\u4ea4\u4e92\u793a\u4f8b\uff1a\n\n**\u793a\u4f8b1**\uff1a\u5199\u5355\u4e2a\u5bc4\u5b58\u5668\u3002\u541101\u5730\u5740\u8bbe\u59070x0105\u4fdd\u6301\u5bc4\u5b58\u5668\u5199\u51651\u4e2a\u6570\u636e\uff1a0x0190\n\n```\n`\u4e3b\u673a\u53d1\u9001\uff1a 01 06 01 05 01 90 99 CB\n\u4ece\u673a\u56de\u590d\uff1a 01 06 01 05 01 90 99 CB`\n```\n\n01\u8868\u793a\u4ece\u673a\u5730\u5740\uff0c06\u529f\u80fd\u7801\u8868\u793a\u5199\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\uff0c0105\u8868\u793a\u5bc4\u5b58\u5668\u5730\u5740\uff0c0190\u8868\u793a\u5199\u5165\u5bc4\u5b58\u5668\u7684\u6570\u503c\uff0c99CB\u4e3aCRC\u6821\u9a8c\u503c\u3002\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u51991\u4e2a\u5bc4\u5b58\u5668\u6570\u636e\u65f6\uff0c\u4ece\u673a\u54cd\u5e94\u7684\u6570\u636e\u5e27\u548c\u4e3b\u673a\u53d1\u9001\u7684\u6570\u636e\u5e27\u5b8c\u6210\u4e00\u81f4\u3002\n\n**\u793a\u4f8b2**\uff1a\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u3002\u541101\u5730\u5740\u8bbe\u59070x0105\u30010x0106\u30010x0107\u5730\u5740\u4fdd\u6301\u5bc4\u5b58\u5668\uff0c\u5199\u51653\u4e2a\u5bc4\u5b58\u5668\u6570\u636e\uff1a0x1102, 0x0304, 0x0566\n\n```\n`\u4e3b\u673a\u53d1\u9001\uff1a01 10 01 05 00 03 06 11 02 03 04 05 66 4a 12\n\u4ece\u673a\u56de\u590d\uff1a01 10 01 05 00 03 91 f5`\n```\n\n\u540c\u7406\uff0c01\u4ece\u673a\u5730\u5740\uff0c10\u529f\u80fd\u7801\u8868\u793a\u5199\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\uff0c0105\u8868\u793a\u8d77\u59cb\u5730\u5740\uff0c0003\u8868\u793a\u51993\u4e2a\u5bc4\u5b58\u5668\uff0c06\u8868\u793a\u6570\u636e\u91cf\u4e3a6\u4e2a\u5b57\u8282\uff0c1102\/0304\/0566\u5206\u522b\u8868\u793a\u5199\u51653\u4e2a\u5bc4\u5b58\u5668\u7684\u6570\u503c\uff0c4a12\u8868\u793aCRC\u6821\u9a8c\u6570\u503c\u3002\n\n\u53ef\u4ee5\u770b\u51fa\uff0c\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u65f6\u4f7f\u752810\u529f\u80fd\u7801\uff0c\u4ece\u673a\u56de\u590d\u6570\u636e\u4e5f\u6bd4\u8f83\u7cbe\u7b80\u3002\n\n**\u793a\u4f8b3**\uff1a\u8bfb\u5355\u4e2a\u5bc4\u5b58\u5668\u3002\u8bfb01\u5730\u5740\u8bbe\u59070x0105\u4fdd\u6301\u5bc4\u5b58\u5668\u6570\u636e\u3002\n\n```\n`\u4e3b\u673a\u53d1\u9001\uff1a01 03 01 05 00 01 95 f7\n\u4ece\u673a\u56de\u590d\uff1a01 03 02 56 78 87 c6`\n```\n\n03\u8868\u793a\u8bfb\u591a\u4e2a\u5bc4\u5b58\u5668\uff0c0105\u8868\u793a\u8d77\u59cb\u5730\u5740\uff0c0001\u8868\u793a\u8bfb1\u4e2a\u5bc4\u5b58\u5668\n\n02\u8868\u793a2\u4e2a\u5b57\u8282\uff0c56 78\u8868\u793a\u5bc4\u5b58\u5668\u7684\u6570\u636e\u3002\n\n**\u793a\u4f8b4**\uff1a\u8bfb\u591a\u4e2a\u5bc4\u5b58\u5668\u3002\u8bfb01\u5730\u5740\u8bbe\u59070x0105\u30010x0106\u30010x0107\u5730\u5740\u4fdd\u6301\u5bc4\u5b58\u5668\uff0c\u51713\u4e2a\u5bc4\u5b58\u5668\u6570\u636e\u3002\n\n```\n`\u4e3b\u673a\u53d1\u9001\uff1a01 03 01 05 00 03 14 36\n\u4ece\u673a\u56de\u590d\uff1a01 03 06 11 22 33 44 55 66 2a 18`\n```\n\n03\u8868\u793a\u8bfb\u591a\u4e2a\u5bc4\u5b58\u5668\uff0c0105\u8868\u793a\u8d77\u59cb\u5730\u5740\uff0c0003\u8868\u793a\u8bfb3\u4e2a\u5bc4\u5b58\u5668\n\n06\u8868\u793a6\u4e2a\u5b57\u8282\uff0c11 22 33 44 55 66\u8868\u793a\u5bc4\u5b58\u5668\u7684\u6570\u636e\u3002\n\n#### **Modbus-ASCII\u6570\u636e\u5e27**\n\nModbus-ASCII\u4f20\u8f93\u6a21\u5f0f\u4e2d\uff0c\u6bcf\u4e2a\u5b57\u8282\u5747\u4ee5ASCII\u7f16\u7801\uff0c\u5b9e\u9645\u62a5\u6587\u4e2d1\u4e2a\u5b57\u8282\u4f1a\u4ee5\u4e24\u4e2aASCII\u5b57\u7b26\u53d1\u9001\uff0c\u56e0\u6b64\u8fd9\u79cd\u6a21\u5f0f\u6bd4Modbus-RTU\u6a21\u5f0f\u6548\u7387\u8981\u4f4e\u3002\n\n\u4f8b\u5982\u62a5\u6587\u6570\u636e`0x5B = \"5\" + \"B\" = 0X35 + 0X42`\u3002\n\n\u6570\u636e\u5e27\u683c\u5f0f\u5982\u4e0b\uff1a\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031603005226-950x110.png)ModbusASCII\u62a5\u6587\u5e27\n\n\u4eceASCII\u62a5\u6587\u5e27\u53ef\u4ee5\u770b\u51fa\uff0cASCII\u6a21\u5f0f\u589e\u52a0\u4e86\u5e27\u8d77\u59cb\uff08\u201c\uff1a\u201d\uff09\u548c\u5e27\u7ed3\u675f\u6807\u5fd7\uff08\u56de\u8f66&\u6362\u884c\uff09\uff0c\u7531\u4e8e\u62a5\u6587\u6570\u636e\u6bcf\u4e2a\u5b57\u8282\u5728ASCII\u6a21\u5f0f\u4e0b\u9700\u89812\u4e2a\u5b57\u7b26\u8fdb\u884c\u7f16\u7801\uff0c\u4e3a\u4e86\u4fdd\u8bc1ASCII\u6a21\u5f0f\u548cRTU\u6a21\u5f0f\u5728\u5e94\u7528\u7ea7\u517c\u5bb9\uff0cASCII\u6a21\u5f0f\u6570\u636e\u5757\u6700\u5927\u957f\u5ea6\u4e3a252x2\uff0c\u6240\u4ee5\u53ef\u4ee5\u8ba1\u7b97\u51fa\u62a5\u6587\u5e27\u6700\u5927\u957f\u5ea6\u4e3a1+2+2+2x252+2+2=513\u5b57\u7b26\uff0c\u62a5\u6587\u5e27\u5185\u7684\u5b57\u7b26\u95f4\u9694\u65f6\u95f4\u53ef\u4ee5\u8fbe1\u79d2\u949f\u3002\n\nModbus-ASCII\u6a21\u5f0f\u6821\u9a8c\u65b9\u6cd5\u91c7\u7528\u7684\u662f**\u7eb5\u5411\u5197\u4f59\u6821\u9a8c** (LRC - Longitudinal Redundancy Checking) \u7b97\u6cd5\uff0c\u6821\u9a8c\u5185\u5bb9\u4e0d\u5305\u62ec\u5e27\u8d77\u59cb\u548c\u5e27\u7ed3\u675f\u5b57\u7b26\u3002\n\n\u8ba1\u7b97\u65b9\u6cd5\u4e5f\u6bd4\u8f83\u7b80\u5355\uff0c\u5bf9\u6821\u9a8c\u5185\u5bb9\u8fdb\u884c\u7d2f\u52a0\u548c\u8ba1\u7b97\uff0c\u5ffd\u7565\u8fdb\u4f4d\uff0c\u5e76\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u8865\u7801\uff1a\n\n\u4f8b\u5982Modbus-ASCII\u6a21\u5f0f\uff0c\u4e3b\u673a\u53d1\u9001\u8bf7\u6c42\uff0c\u5411\u5730\u5740\u4e3a1\u7684\u4ece\u8bbe\u5907\u76840x405\u5730\u5740\uff0c\u5199\u5165\u6570\u503c0x1234\uff0c\u62a5\u6587\u5982\u4e0b\uff1a\n\n`:010604051234AA<CR><LF>`\n\n\u5373\uff1a\n\n`: 01 06 04 05 12 34 AA <CR><LF>`\n\n\u53ef\u4ee5\u770b\u523001\u8868\u793a\u8bbe\u5907\u5730\u5740\uff0c06\u8868\u793a\u5199\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u3002\u5730\u5740\u4e3a0x0405\uff0c\u6570\u636e\u4e3a0x1234\uff0cLRC\u6821\u9a8c\u503c\u4e3a0xAA\u3002\u5b9e\u9645\u8fdb\u884c\u6821\u9a8c\u7684\u6570\u636e\u4e0d\u5305\u542b\u5e27\u5934\u548c\u5e27\u5c3e\u3002\n\n0xAA = LRC(01, 06, 04, 05, 12, 34)\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031511153832-950x497.png)LRC\u6821\u9a8c(\u7eb5\u5411\u5197\u4f59\u6821\u9a8c)\n\n\u624b\u52a8LRC\u8ba1\u7b97\u65b9\u6cd5\uff1a\n\n\u628a\u539f\u59cb\u6570\u636e\u4e24\u4e2a\u5b57\u7b26\u7ec4\u6210\u4e00\u4e2a\u5b57\u8282\uff0c\u5e76\u8fdb\u884c\u4e8c\u8fdb\u5236\u52a0\u6cd5\u8ba1\u7b97\uff1a01+06+04+05+12+34=0x56\uff0c\u8ba1\u7b97\u4e8c\u8fdb\u5236\u8865\u7801\uff1a\n\n```\n`0x56 = 0101 0110\n  \u53d6\u53cd\uff1a1010 1001\n  \u52a01\uff1a 1010 1010 = 0xAA\n\u6216\u8005\uff1a0x100-0x56 = 0xAA`\n```\n\n#### **Modbus-TCP\u6570\u636e\u5e27**\n\nModbus-TCP\u57fa\u4e8e4\u79cd\u62a5\u6587\u7c7b\u578b\uff1a\n\n- MODBUS \u8bf7\u6c42\u662f\u5ba2\u6237\u673a\u5728\u7f51\u7edc\u4e0a\u53d1\u9001\u7528\u6765\u542f\u52a8\u4e8b\u52a1\u5904\u7406\u7684\u62a5\u6587\n\n- MODBUS \u8bc1\u5b9e\u662f\u5728\u5ba2\u6237\u7aef\u63a5\u6536\u7684\u54cd\u5e94\u4fe1\u606f\n\n- MODBUS \u6307\u793a\u662f\u670d\u52a1\u7aef\u63a5\u6536\u7684\u8bf7\u6c42\u62a5\u6587\n\n- MODBUS \u54cd\u5e94\u662f\u670d\u52a1\u5668\u53d1\u9001\u7684\u54cd\u5e94\u4fe1\u606f\n\n**Modbus-TCP\u62a5\u6587\u5e27\uff1a**\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/MBXY-CR-2914fd2c754713bd632be2c6799e258b.png)ModbusTCP\u62a5\u6587\u5e27\n\n\u66f4\u591a\u7684\u7ec6\u8282\u5185\u5bb9\uff0c\u53ef\u4ee5\u5728\u56fd\u6807\u300a**GB-T19582.1-2008 \u7b2c3\u90e8\u5206\uff1aModbus\u534f\u8bae\u5728TCP\/IP\u4e0a\u7684\u5b9e\u73b0\u6307\u5357**\u300b\u67e5\u770b\u3002\n\n### \u4e24\u79cd\u8bf7\u6c42\u6a21\u5f0f\n\nModbus\u534f\u8bae\u4e2d\u4e3b\u673a\u53ef\u4ee5\u4ee5\u4e24\u79cd\u6a21\u5f0f\u5bf9\u4ece\u673a\u8bbe\u5907\u53d1\u51fa\u8bf7\u6c42\uff1a\u5355\u64ad\u548c\u5e7f\u64ad\u3002\n\n#### **\u5355\u64ad\u6a21\u5f0f**\n\n\u5728\u5355\u64ad\u6a21\u5f0f\u4e0b\uff0c\u4ece\u673a\u5730\u5740\u5fc5\u987b\u552f\u4e00\uff0c\u5730\u5740\u8303\u56f41-247\u3002\u4e3b\u673a\u4ee5\u7279\u5b9a\u5730\u5740\u8bbf\u95ee\u6307\u5b9a\u7684\u67d0\u4e2a\u4ece\u673a\uff0c\u53d1\u51fa\u4e00\u4e2a\u8bf7\u6c42\u6570\u636e\u5e27\uff0c\u8fd9\u4e2a\u6570\u636e\u5e27\u529f\u80fd\u53ef\u4ee5\u662f\u8bfb\u53d6\u6216\u5199\u5165\u6570\u636e\uff0c\u4ece\u673a\u63a5\u6536\u5230\u5e76\u5904\u7406\u5b8c\u6210\u540e\uff0c\u4f1a\u56de\u62a5\u4e00\u4e2a\u5e94\u7b54\u6570\u636e\u5e27\uff0c\u4ee5\u8868\u793a\u8bfb\u53d6\u6216\u5199\u5165\u6210\u529f\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031511102878-950x521.png)\u5355\u64ad\u6a21\u5f0f\n\n#### **\u5e7f\u64ad\u6a21\u5f0f**\n\n\u5728\u5e7f\u64ad\u6a21\u5f0f\u4e0b\uff0c\u4e3b\u673a\u5411\u6240\u6709\u7684\u4ece\u673a\u53d1\u51fa\u8bf7\u6c42\u6570\u636e\u5e27\uff0c\u6240\u6709\u7684\u4ece\u673a\u90fd\u4f1a\u5904\u7406\u8fd9\u6761\u547d\u4ee4\uff0c\u5bf9\u4e8e\u5e7f\u64ad\u8bf7\u6c42\uff0c\u6240\u6709\u7684\u4ece\u673a\u65e0\u9700\u505a\u51fa\u5e94\u7b54\u64cd\u4f5c\u3002\u4e00\u822c\u5730\u57400\u8868\u793a\u5e7f\u64ad\u5730\u5740\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031511104255-950x527.png)\u5e7f\u64ad\u6a21\u5f0f\n\n\u4f46\u4e5f\u6709\u4e00\u4e9b\u7279\u6b8a\u7684\u8bbe\u5907\u91c7\u75280xFE\u4f5c\u4e3a\u5e7f\u64ad\u5730\u5740\uff0c\u4ee5\u4e00\u6b3e\u6c14\u4f53\u4f20\u611f\u5668\u6570\u636e\u624b\u518c\u4e3a\u4f8b\uff0c\u4ee50xFE\u4f5c\u4e3a\u5e7f\u64ad\u5730\u5740\uff0c\u6765\u8fdb\u884c\u8bbe\u5907\u5730\u5740\u4fee\u6539\uff1a\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/MBXY-CR-7e0de87661b9df7b0152e1d61f51161c.png)\u67d0\u4f20\u611f\u5668\u5e7f\u64ad\u5730\u5740\n\n\u6240\u4ee5\u8981\u4ee5\u5b9e\u9645\u8bbe\u5907\u7684\u4f7f\u7528\u624b\u518c\u4e3a\u51c6\u3002\n\n#### **Modbus\u5730\u5740\u89c4\u5219**\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/03\/2022031603095287-950x296.png)\u5730\u5740\u89c4\u5219\n\n### Modbus\u6269\u5c55\u7248\u672c\n\nModbus \u662f\u4f7f\u7528\u5f02\u6b65\u4f20\u8f93\u7684\u65b9\u5f0f\uff0c\u901f\u5ea6\u8f83\u6162\uff0c\u5e94\u7528\u4e0a\u6709\u5176\u9650\u5236\uff0c\u5c24\u5176\u5f53\u4e24\u53f0 PLC \u8981\u4e92\u76f8\u4ea4\u6362\u8d44\u6599\uff0c\u5176\u4f20\u8f93\u8d44\u6599\u91cf\u5927\uff0c\u5f02\u6b65\u65b9\u5f0f\u5df2\u7ecf\u65e0\u6cd5\u6ee1\u8db3\u6574\u4f53\u7cfb\u7edf\u53cd\u5e94\u65f6\u95f4\u7684\u8981\u6c42\u3002\u6240\u4ee5\u5c31\u6709 Modbus Plus \u51fa\u73b0\uff0c\u4f7f\u7528\u540c\u6b65\u4f20\u8f93\u7684\u6280\u672f\uff0c\u8d44\u6599\u683c\u5f0f\u4e0e Modbus \u4e00\u6837\uff0c\u6b64\u534f\u8bae\u662fModicon\u4e13\u6709\u7684\uff0c\u548cModbus\u4e0d\u540c\uff0c\u5b83\u9700\u8981\u4e00\u4e2a\u4e13\u95e8\u7684\u534f\u5904\u7406\u5668\u6765\u5904\u7406\u7c7b\u4f3cHDLC\u7684\u9ad8\u901f\u4ee4\u724c\u65cb\u8f6c\u3002\u5b83\u4f7f\u75281Mbit\/s\u7684\u53cc\u7ede\u7ebf\uff0c\u5e76\u4e14\u6bcf\u4e2a\u8282\u70b9\u90fd\u6709\u8f6c\u6362\u9694\u79bb\u8bbe\u5907\uff0c\u662f\u4e00\u79cd\u91c7\u7528\u8fb9\u6cbf\u89e6\u53d1\u800c\u4e0d\u662f\u7535\u5e73\u89e6\u53d1\u7684\u8bbe\u5907\u3002\u8fde\u63a5Modbus Plus\u5230\u8ba1\u7b97\u673a\u9700\u8981\u7279\u522b\u7684\u63a5\u53e3\uff0c\u901a\u5e38\u662f\u652f\u6301ISA\uff08SA85\uff09\uff0cPCI\u6216\u8005PCMCIA\u603b\u7ebf\u7684\u677f\u5361\u3002\n\n### \u5b98\u65b9\u6807\u51c6\u6587\u6863\u4e0b\u8f7d\n\n\u76ee\u524d\u6bd4\u8f83\u6743\u5a01\u4e3b\u8981\u6709\u4ee5\u4e0b2\u4e2a\u6807\u51c6\u6587\u6863\uff1a\n\n- Modbus\u7ec4\u7ec72012\u5e744\u6708\u53d1\u5e03\u7684\uff1a**modbus_application_protocol_specification_v1.1b3.pdf**\n\n- \u56fd\u5bb6\u6807\u51c6**\u300a****\u57fa\u4e8eModbus\u534f\u8bae\u7684\u5de5\u4e1a\u81ea\u52a8\u5316\u7f51\u7edc\u89c4\u8303 GB-T19582.1-2008.pdf****\u300b**\uff0c\u4e3b\u8981\u5305\u62ec3\u90e8\u5206\n\n- GB-T19582.1-2008\u7b2c1\u90e8\u5206\uff1aModbus\u5e94\u7528\u534f\u8bae\n\n- GB-T19582.1-2008\u7b2c2\u90e8\u5206\uff1aModbus\u534f\u8bae\u5728\u4e32\u884c\u94fe\u8def\u4e0a\u7684\u5b9e\u73b0\u6307\u5357\n\n- GB-T19582.1-2008\u7b2c3\u90e8\u5206\uff1aModbus\u534f\u8bae\u5728TCP\/IP\u4e0a\u7684\u5b9e\u73b0\u6307\u5357\n\n---\n*modbus.cn*\n"