"# ModBus RTU\u3001ModBus ASCII\u3001ModBus TCP\u7684\u533a\u522b\uff1f\n\n> 2023-02-11 | 2026-07-01\n> https:\/\/www.modbus.cn\/en\/11684.html\n\n**Modbus \u534f\u8bae\u6807\u51c6**\n\n---\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/02\/1676124884-image.png)\n\n\u5f53\u6211\u4eec\u8c08\u8bba\u81ea\u52a8\u5316\u8bbe\u5907\uff08\u5982PLC\u3001\u6e29\u5ea6\u63a7\u5236\u5668\u7b49\uff09\u4e0e\u8ba1\u7b97\u673a\u4e4b\u95f4\u7684\u901a\u4fe1\u534f\u8bae\u65f6\uff0cModBus\u662f\u4e00\u4e2a\u88ab\u5e7f\u6cdb\u5e94\u7528\u7684\u901a\u4fe1\u534f\u8bae\u3002ModBus\u652f\u6301\u591a\u79cd\u901a\u4fe1\u65b9\u5f0f\uff0c\u5305\u62ecModBus RTU\u3001ModBus ASCII\u548cModBus TCP\u3002\u6bcf\u79cd\u901a\u4fe1\u65b9\u5f0f\u6709\u5176\u72ec\u7279\u7684\u7279\u70b9\u548c\u5e94\u7528\u573a\u666f\u3002\n\nModBus RTU\u91c7\u7528\u4e8c\u8fdb\u5236\u6570\u636e\u4f20\u8f93\uff0c\u662fModBus\u534f\u8bae\u6700\u5e38\u89c1\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002\u5b83\u4f7f\u7528\u4e32\u884c\u901a\u4fe1\uff0c\u5e76\u652f\u6301RS232\u548cRS485\u4e24\u79cd\u63a5\u53e3\u3002\u5728RTU\u6a21\u5f0f\u4e0b\uff0c\u6bcf\u4e2a\u5b57\u8282\u53ef\u4ee5\u4f20\u8f93\u4e24\u4f4d\u5341\u516d\u8fdb\u5236\u5b57\u7b26\u3002ModBus RTU\u5177\u6709\u8f83\u9ad8\u7684\u4f20\u8f93\u6548\u7387\u548c\u7a33\u5b9a\u6027\uff0c\u4f46\u4e0d\u592a\u6613\u8bfb\u3002\u5b83\u7684\u6d88\u606f\u5e27\u683c\u5f0f\u7531\u591a\u4e2a\u90e8\u5206\u7ec4\u6210\uff0c\u6bd4\u5982\u5730\u5740\u7801\u3001\u529f\u80fd\u7801\u3001\u6570\u636e\u7b49\u3002\n\n\u5176\u6d88\u606f\u5e27\u683c\u5f0f\u7531\u4ee5\u4e0b\u90e8\u5206\u7ec4\u6210\uff1a\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/02\/1676124928-image.png)\n\nModBus ASCII\u91c7\u7528ASCII\u7801\u4f20\u8f93\u6587\u672c\u4fe1\u606f\u3002\u76f8\u5bf9\u4e8eModBus RTU\u800c\u8a00\uff0c\u5b83\u7684\u4f20\u8f93\u6548\u7387\u8f83\u4f4e\uff0c\u4f46\u5177\u6709\u66f4\u597d\u7684\u53ef\u8bfb\u6027\u3002ModBus ASCII\u4e5f\u4f7f\u7528\u4e32\u884c\u901a\u4fe1\uff0c\u5e76\u652f\u6301RS232\u548cRS485\u4e24\u79cd\u63a5\u53e3\uff0c\u9002\u7528\u4e8e\u77ed\u8ddd\u79bb\u901a\u4fe1\u3002\u5728ASCII\u6a21\u5f0f\u4e0b\uff0c\u6bcf\u4e2a8\u4f4d\u7684\u5b57\u8282\u62c6\u5206\u4e3a\u4e24\u4e2aASCII\u5b57\u7b26\u8fdb\u884c\u53d1\u9001\uff0c\u6d88\u606f\u5e27\u4ee5\u82f1\u6587\u5192\u53f7\u201c\uff1a\u201d\u5f00\u59cb\uff0c\u4ee5\u56de\u8f66\u548c\u6362\u884c\u7b26\u53f7\uff08CRLF\uff09\u7ed3\u675f\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/02\/1676124962-image.png)\n\nModBus TCP\u662fModBus\u534f\u8bae\u7684\u4e00\u79cd\u6269\u5c55\uff0c\u5b83\u4f7f\u7528TCP\/IP\u534f\u8bae\u8fdb\u884c\u901a\u4fe1\uff0c\u53ef\u4ee5\u5728\u5c40\u57df\u7f51\uff08LAN\uff09\u548c\u5e7f\u57df\u7f51\uff08WAN\uff09\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u3002ModBus TCP\u652f\u6301\u591a\u79cd\u7f51\u7edc\u8bbe\u5907\uff0c\u5305\u62ec\u8ba1\u7b97\u673a\u3001\u670d\u52a1\u5668\u3001\u4ea4\u6362\u673a\u3001\u8def\u7531\u5668\u7b49\u3002\u5b83\u9002\u7528\u4e8e\u8fdc\u7a0b\u76d1\u63a7\u548c\u63a7\u5236\uff0c\u5e38\u7528\u4e8e\u5de5\u4e1a\u7f51\u7edc\u548c\u7269\u8054\u7f51\u5e94\u7528\u3002\u8be5\u534f\u8bae\u7684\u7269\u7406\u5c42\u3001\u6570\u636e\u94fe\u8def\u5c42\u3001\u7f51\u7edc\u5c42\u3001\u4f20\u8f93\u5c42\u90fd\u662f\u57fa\u4e8eTCP\u534f\u8bae\uff0c\u5b83\u53ea\u662f\u5728\u5e94\u7528\u5c42\u5c06ModBus\u534f\u8bae\u5c01\u88c5\u8fdb\u53bb\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/02\/1676124978-image.png)\n\n\u5728ModBus RTU\u548cModBus ASCII\u4e2d\uff0c\u901a\u4fe1\u662f\u901a\u8fc7\u4e32\u884c\u63a5\u53e3\u8fdb\u884c\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u53ea\u80fd\u5728\u8f83\u77ed\u7684\u8ddd\u79bb\u5185\u8fdb\u884c\u901a\u4fe1\u3002\u56e0\u6b64\uff0c\u5982\u679c\u9700\u8981\u5728\u8f83\u8fdc\u7684\u8ddd\u79bb\u5185\u8fdb\u884c\u901a\u4fe1\uff0c\u5219\u9700\u8981\u4f7f\u7528ModBus TCP\u3002\u53e6\u4e00\u65b9\u9762\uff0cModBus RTU\u548cModBus ASCII\u4f7f\u7528\u4e8c\u8fdb\u5236\u548cASCII\u7801\u5206\u522b\u8fdb\u884c\u6570\u636e\u4f20\u8f93\uff0c\u56e0\u6b64\u5b83\u4eec\u7684\u4f20\u8f93\u6548\u7387\u548c\u53ef\u8bfb\u6027\u5b58\u5728\u5dee\u5f02\u3002\u5728\u9009\u62e9ModBus\u901a\u4fe1\u65b9\u5f0f\u65f6\uff0c\u9700\u8981\u8003\u8651\u591a\u79cd\u56e0\u7d20\uff0c\u5305\u62ec\u901a\u4fe1\u8ddd\u79bb\u3001\u4f20\u8f93\u6548\u7387\u548c\u53ef\u8bfb\u6027\u3002\n\n\u603b\u4e4b\uff0c\u5bf9\u4e8e\u77ed\u8ddd\u79bb\u901a\u4fe1\uff0cModBus RTU\u548cModBus ASCII\u5747\u53ef\u4f5c\u4e3a\u9009\u62e9\u3002\u5982\u679c\u9700\u8981\u66f4\u9ad8\u7684\u4f20\u8f93\u6548\u7387\uff0c\u5219\u53ef\u4ee5\u9009\u62e9ModBus RTU;\u5982\u679c\u9700\u8981\u66f4\u597d\u7684\u53ef\u8bfb\u6027\uff0c\u5219\u53ef\u4ee5\u9009\u62e9ModBus ASCII\u3002\u5bf9\u4e8e\u8fdc\u8ddd\u79bb\u901a\u4fe1\uff0c\u5219\u53ea\u80fd\u4f7f\u7528ModBus TCP\u3002\n\n---\n*modbus.cn*\n"