"# Modbus\u603b\u7ebf\u4e2d\u4e3a\u4ec0\u4e48\u8981\u52a0\u7ec8\u7aef\u7535\u963b\uff0c\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\n\n> 2023-08-02 | 2026-07-01\n> https:\/\/www.modbus.cn\/en\/21378.html\n\n**Modbus \u534f\u8bae\u6807\u51c6**\n\n---\n\n\u65e0\u8bba\u60a8\u4ece\u4e8b\u5de5\u4e1a\u81ea\u52a8\u5316\u3001\u8fc7\u7a0b\u63a7\u5236\u3001\u673a\u5668\u8bbe\u8ba1\u8fd8\u662f\u4efb\u4f55\u5176\u4ed6\u5de5\u4e1a\u5e94\u7528\uff0c\u5728\u67d0\u4e2a\u65f6\u95f4\u70b9\u60a8\u90fd\u53ef\u80fd\u4f1a\u9047\u5230 RS-485 \u7f51\u7edc\uff0c\u4e3a\u5176\u8fdb\u884c\u6545\u969c\u6392\u9664\u7edd\u5bf9\u662f\u4e00\u573a\u5669\u68a6\u3002\r\n\r\nRS-485 \u6709\u5f88\u591a\u4f18\u70b9\uff0c\u901a\u8fc7 RS-485 \u8fde\u63a5\uff0c\u53ef\u4ee5\u94fa\u8bbe\u6570\u5343\u7c73\u7684\u4fe1\u53f7\u7ebf\uff0c\u5e76\u6210\u529f\u5730\u901a\u8fc7\u7ebf\u8def\u4f20\u8f93\u6570\u636e\uff0c\u65e0\u8bba\u662f\u77ed\u7684\u8fd8\u662f\u957f\u7684 RS-485 \u7ebf\u8def\u3002\u751a\u81f3\u53ef\u4ee5\u4f7f\u7528 RS-485 \u5c06\u6700\u591a 256 \u4e2a\u4e0d\u540c\u7684\u8bbe\u5907\u8fde\u63a5\u5728\u4e00\u8d77\uff08\u8bbe\u5907\u6570\u91cf\u53d6\u51b3\u4e8e RS-485 \u7f51\u7edc\u914d\u7f6e\u3001RS-485 \u9a71\u52a8\u7a0b\u5e8f\u548c\u6bcf\u4e2a RS-485 \u8282\u70b9\u7684\u5355\u4f4d\u8d1f\u8f7d\uff09\u3002\r\n\r\n\u4ece\u63a5\u7ebf\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u5b83\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u4e00\u6839\u4f20\u8f93\u7ebf\u3001\u4e00\u6839\u63a5\u6536\u7ebf\u548c\u4e00\u6839\u4fe1\u53f7\u516c\u5171\u7ebf\uff08\u662f\u7684\uff0c\u8bf7\u4f7f\u7528\u4e00\u6839\u4fe1\u53f7\u516c\u5171\u7ebf\uff0c\u4ec5\u4e00\u7aef\u63a5\u5730\uff0c\u8c22\u8c22\uff01\uff09\u3002\u4f46\u6784\u5efa\u5f3a\u5927\u4e14\u53ef\u9760 RS-485 \u7f51\u7edc\u9700\u8981\u8003\u8651\u5f88\u591a\u56e0\u7d20\u3002\r\n\r\nRS-485 \u4e5f\u662f\u4e00\u79cd\u76f8\u5f53\u5bbd\u5bb9\u7684\u534f\u8bae\uff0c\u5373\u4f7f\u603b\u7ebf\u914d\u7f6e\u9519\u8bef\uff0c\u4e5f\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\u591a\u5e74\u3002\u5728\u67d0\u4e9b RS-485 \u7f51\u7edc\u8bbe\u8ba1\u4e2d\uff0c\u504f\u7f6e\u548c\u7aef\u63a5\u7528\u4e8e\u4f7f RS-485 \u7f51\u7edc\u66f4\u52a0\u7a33\u5065\u5e76\u4e14\u901a\u4fe1\u66f4\u52a0\u53ef\u9760\u3002\r\n\r\n\u5982\u679c\u60a8\u7684\u7f51\u7edc\u51fa\u73b0\u901a\u4fe1\u95ee\u9898\uff0c\u7ec8\u6b62\u548c\u504f\u7f6e\u901a\u5e38\u662f\u6539\u5584 RS-485 \u7f51\u7edc\u901a\u4fe1\u7684\u9996\u8981\u8d77\u70b9\u3002\r\n\r\n\u8981\u771f\u6b63\u4e86\u89e3\u4f55\u65f6\u4ee5\u53ca\u5982\u4f55\u5b9e\u65bd\u5b83\u4eec\uff0c\u6211\u4eec\u9700\u8981\u9996\u5148\u4e86\u89e3 \u957f RS-485 \u7ebf\u8def \u4e0e \u77ed RS-485 \u7ebf\u8def \uff0c\u8fd9\u4e0d\u4ec5\u4ec5\u4e0e\u7535\u7ebf\u7684\u7269\u7406\u957f\u5ea6\u6709\u5173\u3002\r\n\n## \u957f\u7ebf\u4e0e\u77ed\u7ebf\n\n\r\n\u60a8\u53ef\u80fd\u4f1a\u60ca\u8bb6\u5730\u53d1\u73b0 \u957f RS-485 \u7ebf\u8def \u548c \u77ed RS-485 \u7ebf\u8def \u4e0e\u7535\u7f06\u7684\u957f\u5ea6\u5e76\u4e0d\u5b8c\u5168\u76f8\u5173\u3002\u957f\u548c\u77ed\u5b9e\u9645\u4e0a\u4e0e RS-485 \u7ebf\u8def\u884c\u4e3a\u6709\u66f4\u591a\u5173\u7cfb\uff0c\u7279\u522b\u662f\u4fe1\u53f7\u4ece RS-485 \u53d1\u9001\u7aef\u4f20\u8f93\u5230 RS-485 \u63a5\u6536\u7aef\u6240\u9700\u7684\u65f6\u95f4\u3002\r\n\r\n\u8bb8\u591a\u56e0\u7d20\u4f1a\u5f71\u54cd\u6240\u9700\u7684\u65f6\u95f4\uff0c\u5305\u62ec\u4fe1\u53f7\u5728\u7ed9\u5b9a\u7c7b\u578b\u7269\u7406\u7ebf\u8def\u4e2d\u4f20\u64ad\u7684\u901f\u5ea6\u3001\u901a\u8fc7\u7ebf\u8def\u4f20\u64ad\u7684\u4fe1\u53f7\u7684\u9891\u7387\uff08\u8003\u8651\u6570\u636e\u4f20\u8f93\u901f\u5ea6\uff0c\u4f8b\u5982 9600 bps\uff09\uff0c\u4ee5\u53ca\u7535\u7ebf\u672c\u8eab\u7684\u7269\u7406\u957f\u5ea6\u3002\r\n\r\n\u5982\u679c\u7535\u7ebf\u76f8\u5f53\u77ed\u5e76\u4e14\u4fe1\u53f7\u9891\u7387\uff08\u6570\u636e\u4f20\u8f93\u901f\u5ea6\uff09\u76f8\u5bf9\u8f83\u4f4e\uff0c\u4f8b\u5982 300 bps\uff0c\u5219\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u6240\u9700\u7684\u65f6\u95f4\u5bf9\u4f20\u8f93\u6570\u636e\u7684\u8d28\u91cf\u5f71\u54cd\u5f88\u5c0f\u3002\u5728\u8fd9\u4e9b\u7c7b\u578b\u573a\u666f\u4e2d\uff0c\u60a8\u901a\u5e38\u53ef\u4ee5\u5047\u8bbe\u5f53\u53d1\u5c04\u5668\u542f\u7528\u6216\u6253\u5f00\u65f6\uff0c\u53e6\u4e00\u7aef\u7684\u63a5\u6536\u5668\u7acb\u5373\u770b\u5230\u4fe1\u53f7\u3002\r\n\r\n\u7136\u800c\uff0c\u5982\u679c\u6211\u4eec\u5c06\u9891\u7387\u63d0\u9ad8\u5230 19,200 bps\uff0c\u5e76\u5c06\u7535\u7ebf\u5ef6\u957f**1200\u7c73**\uff0c\u5219\u4f1a\u663e\u7740\u589e\u52a0\u4f20\u8f93\u7684 RS-485 \u4fe1\u53f7\u5230\u8fbe RS-485 \u63a5\u6536\u5668\u6240\u9700\u7684\u65f6\u95f4\u3002\r\n\r\n\u4e3a\u4e86\u4e86\u89e3\u4fe1\u53f7\u7ea7\u771f\u6b63\u53d1\u751f\u7684\u60c5\u51b5\uff0c\u6211\u4eec\u9700\u8981\u4e86\u89e3\u672f\u8bed\u201c\u4e0a\u5347\u65f6\u95f4\u201d\u548c\u201c\u7535\u7f06\u5ef6\u8fdf\u201d\u3002\r\n\n## \u4e0a\u5347\u65f6\u95f4\n\n\r\n![\u4e0a\u5347\u548c\u4e0b\u964d\u65f6\u95f4\uff08RS-485 \u4e32\u884c\u7ebf\uff09](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802193913129.jpg)\r\n\r\n\u73b0\u5728\u8ba9\u6211\u4eec\u770b\u770b\u7535\u7f06\u5ef6\u8fdf\u3002\r\n\n### \u7535\u7f06\u5ef6\u8fdf\n\n\r\n\u7535\u7f06\u5ef6\u8fdf\u662f\u6307\u4fe1\u53f7\u901a\u8fc7\u7535\u7f06\u4ece RS-485 \u53d1\u9001\u5668\u4f20\u8f93\u5230 RS-485 \u63a5\u6536\u5668\u6240\u9700\u7684\u65f6\u95f4\u3002\u7535\u4fe1\u53f7\u901a\u8fc7\u94dc\u7ebf\u7684\u4f20\u8f93\u901f\u5ea6\u4e3a\u6bcf\u79d2 124,000 \u5230 140,000 \u82f1\u91cc\uff08\u54c7\uff0c\u592a\u5feb\u4e86\uff09\u3002\u8be5\u901f\u5ea6\u901a\u5e38\u79f0\u4e3a\u4fe1\u53f7\u7684\u4f20\u64ad\u901f\u7387\u3001\u4f20\u64ad\u901f\u5ea6\u6216\u4f20\u8f93\u901f\u5ea6\u3002\u57fa\u672c\u4e0a\uff0c\u8fd9\u662f\u901a\u8fc7\u7535\u7ebf\u5b9e\u9645\u83b7\u53d6\u7535\u4fe1\u53f7\u6240\u9700\u7684\u65f6\u95f4\u3002\r\n\r\n\u603b\u7ed3\u4e00\u4e0b\u4e0a\u5347\u548c\u4e0b\u964d\u65f6\u95f4\u4ee5\u53ca\u7535\u7f06\u5ef6\u8fdf\uff0c\u5982\u679c\u7535\u7f06\u5f88\u77ed\u5e76\u4e14\u4e0a\u5347\u65f6\u95f4\u5f88\u5feb\uff0c\u90a3\u4e48\u4fe1\u53f7\u5ef6\u8fdf\u5b9e\u9645\u4e0a\u4e0d\u9700\u8981\u62c5\u5fc3\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u5f00\u59cb\u4f7f\u7528\u4e0a\u5347\u65f6\u95f4\u8f83\u6162\u7684 RS-485 \u53d1\u9001\u5668\u5ef6\u957f\u81f31200\u7c73\u7684\u7535\u7ebf\uff0c\u5219\u53ef\u80fd\u4f1a\u9047\u5230\u95ee\u9898\u3002\r\n\n### \u662f\u957f\u8fd8\u662f\u77ed\uff1f\n\n\r\n\u4e00\u822c\u51c6\u5219\u662f\u6839\u636e TIA-485-A \u6807\u51c6\u786e\u5b9a RS-485 \u7ebf\u8def\u662f\u957f\u8fd8\u662f\u77ed\u3002\u5728\u8be5\u6807\u51c6\u4e2d\uff0c\u7279\u522b\u662f\u5728\u8865\u5145 TSB-89-A \u4e2d\uff0c\u5f53\u4fe1\u53f7\u7684\u4e0a\u5347\u65f6\u95f4\u5c0f\u4e8e\u5355\u5411\u7535\u7f06\u5ef6\u8fdf\u7684\u4e24\u500d\u65f6\uff0cRS-485 \u7ebf\u8def\u88ab\u89c6\u4e3a\u8f83\u957f\u3002\r\n\r\n\u56e0\u6b64\u8bf7\u8bb0\u4f4f\uff0c\u4ec5\u4ec5\u56e0\u4e3a RS-485 \u7ebf\u8def\u7269\u7406\u4e0a\u77ed\u6216\u957f\u5e76\u4e0d\u4e00\u5b9a\u8868\u660e\u9700\u8981\u504f\u7f6e\u6216\u7ec8\u6b62\u3002\u90a3\u4e48\u6211\u4eec\u4ec0\u4e48\u65f6\u5019\u9700\u8981\u5b9e\u73b0\u504f\u7f6e\u548c\u7ec8\u6b62\u5462\uff1f\r\n\n### \u4f55\u65f6\u7ec8\u6b62 RS-485 \u7ebf\u8def\n\n\r\n\u65e0\u8bba RS-485 \u9a71\u52a8\u5668\u4e0a\u5347\u65f6\u95f4\u662f\u6162\u8fd8\u662f\u5feb\uff0c\u6216\u8005 RS-485 \u7ebf\u8def\u957f\u8fd8\u662f\u77ed\uff0c\u6240\u6709 RS-485 \u7ebf\u8def\u90fd\u53ef\u80fd\u906d\u53d7\u963b\u6297\u4e0d\u5339\u914d\u7684\u5f71\u54cd\uff0c\u4ece\u800c\u5bfc\u81f4\u7535\u538b\u548c\u7535\u6d41\u53cd\u5c04\u3002\u901a\u5e38\u53cd\u5c04\u53d1\u751f\u5728\u957f\u7ebf\u8def\u4e0a\uff0c\u5bfc\u81f4\u63a5\u6536\u5668\u8bef\u8bfb\u903b\u8f91\u7535\u5e73\u3002\u6b63\u786e\u7684\u7ec8\u6b62\u53ef\u4ee5\u9632\u6b62\u53cd\u5c04\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u5b8c\u6574\u6027\u3002\r\n\r\n\u5f53\u7535\u538b\u9996\u6b21\u65bd\u52a0\u5230 RS-485 \u7ebf\u8def\u65f6\uff0c\u200b\u200b\u7535\u6d41\u4f1a\u6d41\u8fc7\u8be5\u7ebf\u8def\uff08\u5373\u4f7f\u7ebf\u8def\u5f00\u8def\uff09\u3002\u5230\u8fbe\u7ebf\u8def\u672b\u7aef\u540e\u4e0d\u4e45\uff0c\u7535\u6d41\u7a33\u5b9a\u5230\u7531\u7ebf\u8def\u4e2d\u7684\u4e32\u8054\u7535\u963b\u3001\u65bd\u52a0\u7684\u7535\u538b\u548c\u7ec8\u6b62\u786e\u5b9a\u7684\u6700\u7ec8\u503c\u3002\u5982\u679c\u521d\u59cb\u7535\u6d41\u548c\u6700\u7ec8\u7535\u6d41\u53d8\u5316\uff0c\u7ebf\u8def\u4f1a\u5728\u7535\u6d41\u7a33\u5b9a\u65f6\u770b\u5230\u53cd\u5c04\u7535\u538b\uff0c\u4ece\u800c\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u5b8c\u6574\u6027\u95ee\u9898\u3002\r\n\r\n\u5982\u679c\u6570\u636e\u901f\u7387\u4f4e\u6216\u7535\u7f06\u77ed\uff0c\u5219\u53ef\u80fd\u4e0d\u9700\u8981\u7aef\u63a5\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u968f\u7740\u6570\u636e\u901f\u7387\u548c\/\u6216\u7535\u7f06\u957f\u5ea6\u7684\u589e\u52a0\uff0c\u7aef\u63a5\u53d8\u5f97\u5f3a\u5236\u6027\u3002\r\n\n### \u5982\u4f55\u7aef\u63a5 RS-485 \u7ebf\u8def\n\n\r\n\u4f7f\u7528\u7b49\u4e8e\u5176\u7279\u6027\u963b\u6297\u7684\u503c\u6765\u7aef\u63a5\u6570\u636e\u7535\u7f06\u53ef\u4ee5\u51cf\u5c11\u53cd\u5c04\uff0c\u5e76\u4f7f\u60a8\u7684 RS-485 \u7f51\u7edc\u66f4\u52a0\u53ef\u9760\u3002\u7531\u4e8e\u603b\u7ebf\u4e0a\u7684\u4efb\u4f55\u8bbe\u5907\u90fd\u53ef\u4ee5\u5728\u4efb\u4f55\u7ed9\u5b9a\u65f6\u95f4\u8fdb\u884c\u4f20\u8f93\uff0c\u56e0\u6b64\u603b\u7ebf\u4e2d\u95f4\u7684\u8282\u70b9\u5f88\u53ef\u80fd\u4f1a\u8fdb\u884c\u4f20\u8f93\uff0c\u4ece\u800c\u9700\u8981\u5bf9\u6bb5\u7684\u4e24\u7aef\u5e94\u7528\u7ec8\u6b62\u3002\r\n\r\n\u8981\u6b63\u786e\u7aef\u63a5\u957f\u7ebf\u8def\uff0c\u9996\u5148\u9700\u8981\u77e5\u9053\u7ebf\u8def\u7684\u7279\u6027\u963b\u6297\u3002\u60a8\u901a\u5e38\u53ef\u4ee5\u4ece\u7535\u7f06\u5236\u9020\u5546\u5904\u83b7\u53d6\u6b64\u4fe1\u606f\u3002\uff08\u8fd8\u6709\u66f4\u590d\u6742\u7684\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u8fd9\u91cc\u4e0d\u518d\u4ecb\u7ecd\u3002\uff09\r\n\r\n\u5728\u7ebf\u8def\u4e0a\u6dfb\u52a0\u7ec8\u7aef\u65f6\uff0c\u4e0d\u5e94\u4f7f\u7528\u8d85\u8fc7\u4e24\u4e2a\u7535\u963b\uff0c\u7ebf\u8def\u7684\u6bcf\u4e00\u7aef\u5404\u4e00\u4e2a\u3002\u5bf9\u4e8e\u7279\u6027\u963b\u6297\u4e3a120\u03a9\u7684\u7535\u7f06\uff0c\u7ec8\u7aef\u7535\u963b\u5e94\u4e3a120\u03a9\u3002\u6839\u636e\u6211\u7684\u7ecf\u9a8c\uff0c\u6211\u4eec\u51e0\u4e4e\u603b\u662f\u6700\u7ec8\u4f7f\u7528 120 \u03a9 \u7535\u963b\u5668\u8fdb\u884c\u7aef\u63a5\uff0c\u56e0\u4e3a\u8fd9\u5c31\u662f\u5c4f\u853d\u53cc\u7ede\u7ebf\u6240\u9700\u8981\u7684\u3002\u56e0\u6b64\uff0c\u5c06\u5176\u4e2d\u4e00\u4e9b\u4fdd\u7559\u5728\u65e7\u5de5\u5177\u7bb1\u4e2d\u53ef\u80fd\u662f\u4e2a\u597d\u4e3b\u610f\u3002\r\n\n### \u9009\u62e9\u6b63\u786e\u7684\u7ec8\u6b62\u65b9\u5f0f\n\n\r\n\u6700\u6d41\u884c\u7684\u7aef\u63a5\u65b9\u6cd5\u662f\u5e76\u884c\u7aef\u63a5\uff0c\u5373\u5728\u7269\u7406\u94fe\u8def\u7684\u6bcf\u4e00\u7aef\u653e\u7f6e\u4e00\u4e2a\u7535\u963b\u3002\u5c06\u5176\u653e\u7f6e\u5728\u7ebf\u8def\u672b\u7aef\u53ef\u4ee5\u6d88\u9664\u6240\u6709\u53cd\u5c04\uff0c\u5c3d\u7ba1\u8fd9\u79cd\u65b9\u6cd5\u4f1a\u5bfc\u81f4\u66f4\u9ad8\u7684\u529f\u8017\u3002\u7535\u963b\u7ec8\u7aef\u7535\u963b\u7684\u503c\u901a\u5e38\u4e3a 120 \u81f3 130 \u03a9\u3002\u867d\u7136\u53cc\u7ede\u7ebf\u7535\u7f06\u963b\u6297\u53ef\u4f4e\u81f3 100 \u03a9\uff0c\u4f46\u5bf9\u4e8e RS-485 \u9a71\u52a8\u5668\u6765\u8bf4 100 \u03a9 \u7ec8\u7aef\u7535\u963b\u592a\u4f4e\uff0c\u56e0\u4e3a\u4e24\u4e2a\u5e76\u8054\u4ea7\u751f 50 \u03a9\uff0c\u800c RS-485 \u9a71\u52a8\u5668\u7684\u989d\u5b9a\u8d1f\u8f7d\u4e0d\u4f4e\u4e8e 54 \u03a9\u3002\r\n\r\n\u5c06\u4e0e\u7535\u7f06\u963b\u6297\u5339\u914d\u7684\u7ec8\u7aef\u7535\u963b\u653e\u7f6e\u5728\u65b9\u4fbf\u7684\u4f4d\u7f6e\uff0c\u5c3d\u53ef\u80fd\u9760\u8fd1 RS-485 \u7ebf\u8def\u7684\u672b\u7aef\u3002\u8fde\u63a5\u5230 RS-485 \u7ebf\u8def\u7684\u8282\u70b9\u53ef\u80fd\u5185\u7f6e\u6709\u7ec8\u7aef\u7535\u963b\u4f5c\u4e3a\u53ef\u914d\u7f6e\u8bbe\u7f6e\uff0c\u56e0\u6b64\u5728\u5411\u4efb\u4f55\u7ebf\u8def\u6dfb\u52a0\u7ec8\u7aef\u7535\u963b\u65f6\u8bf7\u8fdb\u884c\u68c0\u67e5\u3002\r\n\r\n\u4e00\u822c\u6765\u8bf4\uff0c\u5bf9\u4e8e\u6240\u6709\u957f\u7ebf RS-485 \u8fde\u63a5\u6765\u8bf4\uff0c\u7aef\u63a5\u662f\u4e00\u4e2a\u597d\u4e3b\u610f\u3002\u4f46\u5982\u679c\u67d0\u4e9b\u77ed\u7ebf\u5177\u6709\u5feb\u901f\u4e0a\u5347\u65f6\u95f4\uff0c\u90a3\u4e48\u5b83\u4eec\u4e5f\u53ef\u4ee5\u4ece\u5b9e\u65bd\u7aef\u63a5\u4e2d\u53d7\u76ca\u3002\r\n\r\n\u65e2\u7136\u60a8\u662f\u6b63\u5f0f\u7684 RS-485 \u7ec8\u7ed3\u8005\uff0c\u6211\u4eec\u5982\u4f55\u89e3\u51b3\u504f\u5dee\u95ee\u9898\uff1f\r\n\n### \u504f\u7f6e RS-485 \u8fde\u63a5\n\n\r\nRS-485 \u662f\u4e00\u79cd\u591a\u70b9\u901a\u4fe1\u89c4\u8303\uff0c\u5176\u4e2d\u6240\u6709\u8282\u70b9\u5171\u4eab\u516c\u5171\u4e24\u7ebf\u8fde\u63a5\uff08\u52a0\u4e0a\u4e00\u6839\u7528\u4e8e\u4fe1\u53f7\u516c\u5171\u7aef\u7684\u9644\u52a0\u7ebf\uff09\u3002\u8fd9\u5bfc\u81f4\u7ebf\u4e0a\u6570\u636e\u51b2\u7a81\u7684\u673a\u4f1a\u5f88\u591a\u3002\u5728 RS-485 \u7f51\u7edc\u4e0a\uff0c\u4e00\u6b21\u53ea\u5141\u8bb8\u4e00\u53f0\u8bbe\u5907\u8fdb\u884c\u901a\u4fe1\uff1b\u5426\u5219\u53ef\u80fd\u4f1a\u53d1\u751f\u6570\u636e\u51b2\u7a81\u3002\r\n\r\n\u5728\u4e3b\/\u4ece\u534f\u8bae\u4e2d\uff0c\u8fd9\u4e0d\u592a\u91cd\u8981\uff0c\u56e0\u4e3a\u4e3b\u8bbe\u5907\u901a\u5e38\u4f1a\u53d1\u8d77\u8bf7\u6c42\uff0c\u7136\u540e\u4ece\u8bbe\u5907\u4f1a\u5728\u90a3\u65f6\u505a\u51fa\u54cd\u5e94\u3002\u7136\u800c\uff0c\u5728\u4e3b\u8bbe\u5907\u6216\u4ece\u8bbe\u5907\u4e0d\u8fdb\u884c\u4f20\u8f93\u671f\u95f4\uff0c\u7ebf\u8def\u5904\u4e8e\u6240\u8c13\u7684\u4e09\u6001\u6a21\u5f0f\u3002\u6bcf\u4e2a\u6536\u53d1\u5668\u652f\u6301\u4e09\u79cd\u4e0d\u540c\u7684\u72b6\u6001\uff1a\u6253\u5f00\u3001\u5173\u95ed\uff08\u4f20\u8f93\uff09\u6216\u7981\u7528\uff08\u4e09\u6001\uff0c\u4e0d\u4f20\u8f93\uff09\u3002\u4e00\u6b21\u53ea\u6709\u4e00\u4e2a\u6536\u53d1\u5668\u53ef\u4ee5\u63a7\u5236\u94fe\u8def\u7684\u5f00\u542f\u6216\u5173\u95ed\u72b6\u6001\u3002\u6240\u6709\u5176\u4ed6\u8bbe\u5907\u5728\u4e0d\u4f20\u8f93\u65f6\u5fc5\u987b\u5904\u4e8e\u4e09\u6001\u6a21\u5f0f\u3002\r\n\r\n\u5f53\u7ebf\u8def\u5728\u4e09\u6001\u6a21\u5f0f\u4e0b\u6d6e\u52a8\u65f6\uff0c\u7ebf\u8def\u4e0a\u7684\u566a\u58f0\u53ef\u80fd\u4f1a\u9519\u8bef\u5730\u89e6\u53d1\u63a5\u6536\u5668\u3002\u4e3a\u4e86\u786e\u4fdd\u5f53\u6240\u6709\u53d1\u5c04\u5668\u5173\u95ed\u65f6 RS-485 \u7ebf\u8def\u5904\u4e8e\u5b9a\u4e49\u7684\u72b6\u6001\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u7ebf\u8def\u4e0a\u4f7f\u7528\u6545\u969c\u5b89\u5168\u504f\u7f6e\u3002\r\n\r\n\u504f\u7f6e\u7684\u76ee\u7684\u662f\u786e\u4fdd\u5728\u6ca1\u6709\u8bbe\u5907\u4f20\u8f93\u65f6 RS-485 \u7ebf\u8def\u4fdd\u6301\u5728\u5df2\u77e5\u7684\u3001\u975e\u6ce2\u52a8\u7684\u72b6\u6001\u3002 \u504f\u7f6e\u6574\u4e2a\u7f51\u7edc\u9700\u8981\u4e00\u5bf9\u7535\u963b\uff1a\u6dfb\u52a0\u4e00\u4e2a\u8fde\u63a5\u5230+V\u4fe1\u53f7\u7ebf\u7684+5V\u4e0a\u62c9\u7535\u963b\uff0c\u4ee5\u53ca\u8fde\u63a5\u5230-V\u4fe1\u53f7\u7ebf\u7684\u63a5\u5730\u4e0b\u62c9\u7535\u963b\u3002\r\n\r\n![SnapMasterToSlaves.jpg](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802193916455.jpg)\r\n\r\n\u5c06\u504f\u7f6e\u7535\u963b\u5668\u4e0e\u7ec8\u7aef\u7535\u963b\u5668\u7ed3\u5408\u4f7f\u7528\u53ef\u521b\u5efa\u5206\u538b\u5668\u3002\u5982\u679c\u8282\u70b9\u4e0e\u7f51\u7edc\u65ad\u5f00\u8fde\u63a5\u6216\u7f51\u7edc\u7ebf\u8def\u4e2d\u65ad\uff0c\u5185\u90e8\u6545\u969c\u5b89\u5168\u7535\u8def\u4f1a\u5c06\u8f93\u5165\u4fdd\u6301\u5728\u903b\u8f911\u3002\n\n---\n*modbus.cn*\n"