"# Modbus RTU\u5982\u4f55\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\uff1f\u5c0f\u767d\u6559\u7a0b\n\n> 2023-09-20 | 2026-07-01\n> https:\/\/www.modbus.cn\/en\/25000.html\n\n**Modbus \u534f\u8bae\u6807\u51c6**\n\n---\n\n## Modbus RTU \u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u8be6\u89e3\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/09\/20230920212624853.jpg)\n\n### 1. \u534f\u8bae\u6982\u8ff0\n\nModbus RTU \u662f\u4e00\u79cd\u4e32\u884c\u901a\u4fe1\u534f\u8bae\uff0c\u7528\u4e8e\u5de5\u4e1a\u81ea\u52a8\u5316\u4e2d\u7684\u8bbe\u5907\u95f4\u901a\u4fe1\u3002\u4e3b\u8981\u7279\u70b9\u662f\u7b80\u5355\u3001\u7a33\u5b9a\u3002\u5728\u8fd9\u4e2a\u6a21\u5f0f\u4e2d\uff0c\u6570\u636e\u662f\u4ee5\u4e8c\u8fdb\u5236\u7684\u5f62\u5f0f\u4f20\u8f93\u7684\u3002\n\n### 2. \u5199\u591a\u4e2a\u5bc4\u5b58\u5668\n\n\u5f53\u6211\u4eec\u9700\u8981\u4fee\u6539\u4e00\u4e2a\u8bbe\u5907\uff08\u4f8b\u5982\uff0c\u7535\u673a\u9a71\u52a8\u5668\u6216\u4f20\u611f\u5668\uff09\u4e0a\u7684\u591a\u4e2a\u53c2\u6570\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u201c\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u201d\u529f\u80fd\u3002\n\n### 3. \u8bf7\u6c42\u683c\u5f0f\n\n\u4e00\u4e2a\u6807\u51c6\u7684Modbus RTU\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u7684\u8bf7\u6c42\u5305\u542b\u4ee5\u4e0b\u90e8\u5206\uff1a\n\n- **\u8bbe\u5907\u5730\u5740**: 1\u5b57\u8282\uff0c\u6807\u8bc6\u8981\u901a\u4fe1\u7684\u76ee\u6807\u8bbe\u5907\u3002\n\n- **\u529f\u80fd\u7801**: 1\u5b57\u8282\uff0c\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u7684\u529f\u80fd\u7801\u4e3a `0x10`\u3002\n\n- **\u8d77\u59cb\u5bc4\u5b58\u5668\u5730\u5740**: 2\u5b57\u8282\uff0c\u6307\u5b9a\u7b2c\u4e00\u4e2a\u8981\u5199\u5165\u7684\u5bc4\u5b58\u5668\u7684\u5730\u5740\u3002\n\n- **\u5bc4\u5b58\u5668\u6570\u91cf**: 2\u5b57\u8282\uff0c\u6307\u5b9a\u8981\u5199\u5165\u7684\u5bc4\u5b58\u5668\u7684\u603b\u6570\u91cf\u3002\n\n- **\u5b57\u8282\u8ba1\u6570**: 1\u5b57\u8282\uff0c\u8868\u793a\u540e\u7eed\u8981\u5199\u5165\u7684\u6570\u636e\u603b\u5b57\u8282\u6570\u3002\n\n- **\u6570\u636e**: \u6839\u636e\u9700\u8981\u5199\u5165\u7684\u5bc4\u5b58\u5668\u6570\u91cf\u53d8\u5316\uff0c\u6bcf\u4e2a\u5bc4\u5b58\u5668\u4e3a2\u5b57\u8282\u3002\n\n- **CRC\u6821\u9a8c**: 2\u5b57\u8282\uff0c\u7528\u4e8e\u9a8c\u8bc1\u6d88\u606f\u7684\u5b8c\u6574\u6027\u3002\n\n### 4. \u4f8b\u5b50\n\n\u5047\u8bbe\u6211\u4eec\u8981\u5411\u5730\u5740\u4e3a `0x01` \u7684\u8bbe\u5907\u5199\u5165\uff0c\u4ece\u5bc4\u5b58\u5668\u5730\u5740 `0x3000` \u5f00\u59cb\uff0c\u8fde\u7eed\u76844\u4e2a\u5bc4\u5b58\u5668\u3002\u6211\u4eec\u8981\u5199\u5165\u7684\u6570\u636e\u662f\uff1a`0x1234`, `0x5678`, `0x9ABC`, `0xDEF0`\u3002\n\n\u6784\u9020\u7684\u6d88\u606f\u4e3a\uff1a\n\n```\n01       (\u8bbe\u5907\u5730\u5740)\n10       (\u529f\u80fd\u7801)\n30 00    (\u8d77\u59cb\u5bc4\u5b58\u5668\u5730\u5740)\n00 04    (\u5bc4\u5b58\u5668\u6570\u91cf)\n08       (\u5b57\u8282\u8ba1\u6570\uff0c4\u5bc4\u5b58\u5668*2\u5b57\u8282\/\u5bc4\u5b58\u5668)\n12 34 56 78 9A BC DE F0 (\u6570\u636e)\n?? ??    (CRC\u6821\u9a8c, \u5b9e\u9645\u503c\u9700\u8981\u4f7f\u7528crc16-modbus\u6765\u8ba1\u7b97)\n```\n\n\u8981\u6ce8\u610f\uff0cCRC\u6821\u9a8c\u503c\u662f\u57fa\u4e8e\u6574\u4e2a\u6d88\u606f\uff08\u9664CRC\u5916\u7684\u90e8\u5206\uff09\u6765\u8ba1\u7b97\u7684\u3002\u4f60\u9700\u8981\u4f7f\u7528Modbus RTU\u7684CRC\u7b97\u6cd5\u6765\u5f97\u5230\u8fd9\u4e2a\u503c\uff0c\u5e76\u5c06\u5b83\u6dfb\u52a0\u5230\u6d88\u606f\u7684\u5c3e\u90e8\u3002\n\n### 5. \u53d1\u9001\u5e76\u7b49\u5f85\n\n\u5b8c\u6210\u6d88\u606f\u540e\uff0c\u901a\u8fc7\u9002\u5f53\u7684\u4e32\u884c\u901a\u8baf\u63a5\u53e3\uff08\u5982RS-485\uff09\u53d1\u9001\u5b83\uff0c\u5e76\u7b49\u5f85\u4ece\u8bbe\u5907\u7684\u54cd\u5e94\u3002\u54cd\u5e94\u683c\u5f0f\u548c\u8bf7\u6c42\u7c7b\u4f3c\uff0c\u4f46\u4e0d\u5305\u542b\u5b57\u8282\u8ba1\u6570\u548c\u6570\u636e\u90e8\u5206\u3002\n\n---\n*modbus.cn*\n"