"# RS485\u901a\u8bafMODBUS RTU\u4ece\u673a\u6a21\u5f0f\u5de5\u4e1a\u9065\u63a7\u5668\u8bf4\u660e\u4e66\n\n> 2025-06-05 | 2025-10-11\n> https:\/\/www.modbus.cn\/en\/31440.html\n\n**\u4ea7\u54c1\u8bf4\u660e\u4e66**\n\n---\n\n## \u4e00\u3001\u4ea7\u54c1\u6982\u8ff0\n\n\u672c 485 \u901a\u4fe1\u6a21\u5757\u91c7\u7528 MODBUS RTU \u4ece\u673a\u6a21\u5f0f\uff0c\u4e3b\u8981\u7528\u4e8e\u5b9e\u73b0\u4e0a\u4f4d\u673a\u5bf9\u9065\u63a7\u5668\u6309\u952e\u503c\u7684\u8bfb\u53d6\uff0c\u5177\u5907\u7a33\u5b9a\u53ef\u9760\u7684\u901a\u4fe1\u6027\u80fd\uff0c\u9002\u7528\u4e8e\u591a\u79cd\u5de5\u4e1a\u63a7\u5236\u573a\u666f\u3002\n\n## \u4e8c\u3001\u6280\u672f\u53c2\u6570\n\n- **\u5de5\u4f5c\u7535\u538b** \uff1aDC12 - 24V\u3002\n\n- **\u9759\u6001\u7535\u6d41** \uff1a\u5728 12V \u65f6\u4e3a 8.5mA\u3002\n\n- **\u5de5\u4f5c\u7535\u6d41** \uff1a\u5728 12V \u65f6\u4e3a 45mA\u3002\n\n- **\u901a\u8baf\u534f\u8bae** \uff1aMODBUS RTU \u4ece\u673a\u6a21\u5f0f\uff0c\u652f\u6301 MODBUS RTU \u529f\u80fd\u7801 \u201c03\u201d\uff08\u8bfb\u6570\u636e\u5bc4\u5b58\u5668\uff09\uff0c\u4e0a\u4f4d\u673a\u53ef\u901a\u8fc7\u8be5\u529f\u80fd\u7801\u8bfb\u53d6 4 \u4e2a\u5b57\u8282\u7684\u952e\u503c\u5bc4\u5b58\u5668\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2025\/06\/20250605162115512.png)\n\n## \u4e09\u3001\u901a\u4fe1\u914d\u7f6e\n\n- **\u6ce2\u7279\u7387** \uff1a115200\u3002\n\n- **\u6821\u9a8c\u4f4d** \uff1a\u65e0\u3002\n\n- **\u6570\u636e\u4f4d** \uff1a8 \u4f4d\u3002\n\n- **\u505c\u6b62\u4f4d** \uff1a1 \u4f4d\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2025\/06\/20250605162156858.png)\n\n\u901a\u4fe1\u8bf4\u660e\u4e66\uff1a\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2025\/06\/20250605162240852.png)\n\n## \u56db\u3001\u6a21\u5757\u5e94\u7b54\u6570\u636e\u5e27\u683c\u5f0f\n\n- **\u5730\u5740** \uff1a\u4e00\u4e2a\u5b57\u8282\uff0c\u56fa\u5b9a\u4e3a 08\uff0c\u4e0d\u53ef\u6539\u53d8\u3002\n\n- **\u529f\u80fd\u7801** \uff1a\u4e00\u4e2a\u5b57\u8282\uff0c\u53ea\u652f\u6301\u529f\u80fd\u7801 03\u3002\n\n- **\u8bfb\u6570\u636e\u5bc4\u5b58\u5668\u6570\u636e\u5b57\u8282\u4e2a\u6570** \uff1a\u56db\u4e2a\u5b57\u8282\u3002\n\n- **\u6570\u636e** \uff1a\u56db\u4e2a\u5b57\u8282\uff0834 \u4e2a\u4f4d\uff09\uff0c\u5bf9\u5e94\u9065\u63a7\u5668 34 \u4e2a\u6309\u952e\u7684\u503c\u3002\n\n- **\u6821\u9a8c** \uff1a62 CF\u3002\n\n\u4ee5\u4e0a\u5185\u5bb9\u4e3a 485 \u901a\u4fe1\u6a21\u5757\u7684\u5b8c\u6574\u4ea7\u54c1\u8bf4\u660e\u4e66\uff0c\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u6a21\u5757\u7684\u6280\u672f\u53c2\u6570\u3001\u901a\u4fe1\u914d\u7f6e\u3001\u6570\u636e\u5e27\u683c\u5f0f\u7b49\u5173\u952e\u4fe1\u606f\uff0c\u4ee5\u4fbf\u7528\u6237\u66f4\u597d\u5730\u4e86\u89e3\u548c\u4f7f\u7528\u8be5\u6a21\u5757\u3002\n\n---\n*modbus.cn*\n"