"# RS485\u6a21\u7ec4 \u8f93\u5165\u8f93\u51fa IO\u6269\u5c55 Modbus RTU\u534f\u8bae\n\n> 2023-11-25 | 2026-06-30\n> https:\/\/www.modbus.cn\/en\/25930.html\n\n**\u8bbe\u5907\u5bc4\u5b58\u5668\u624b\u518c**\n\n---\n\n\u4e00\uff0e\u4ea7\u54c1\u529f\u80fd\n\n1.\u6a21\u5757\u4f9b\u7535\u6839\u636e\u4e0b\u5355\u65f6\u7684\u53c2\u6570\u4f9b\u7535;\n\n2.\u901a\u8baf\u63a5\u53e3\u652f\u6301 RS485\uff0c\u6807\u51c6\u7684 modbus RTU \u534f\u8bae\n\n3.\u6ce2\u7279\u7387 4800\uff0c9600(\u9ed8\u8ba4)\uff0c14400\uff0c19200\uff0c38400\uff0c56000\uff0c57600\uff0c115200\uff1b 4.\u53ef\u4ee5\u8bbe\u7f6e 1-255 \u4e2a\u8bbe\u5907\u5730\u5740\uff0c1 \u4e3a\u9ed8\u8ba4\u5730\u5740\uff1b\n\n5.\u5177\u6709\u901a\u4fe1\u8d85\u65f6\u5224\u65ad\u529f\u80fd\uff0c\u901a\u4fe1\u65ad\u5f00\u591a\u5c11\u79d2\u4e4b\u540e\uff0c\u7ee7\u7535\u5668\u6253\u5f00\u8fd8\u662f\u5173\u95ed\uff0c\u53ef\u81ea\u7531\u9009\u62e9 6.\u8f93\u5165\u8f93\u51fa 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\u5c31\u8981\u63a5\u6b63\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/11\/20231125120826339.png)\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/11\/20231125120838292.png)\n\n\u56db\uff0e\u7279\u6b8a\u6307\u4ee4\u8be6\u89e3**(06 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16 \u8def\u7ee7\u7535\u5668\u6a21\u7ec4\u4e3a\u4f8b\u5b50\n\n\u203b\u5f53\u53d1\u751f\u901a\u8baf\u6545\u969c\u8d85\u8fc7 3 \u79d2\u540e\u8981\u6c42\uff1a0~7 \u8def\u65ad\u5f00\uff0c8~11 \u8def\u4fdd\u6301\u539f\u6709\u72b6\u6001\uff0c12~15 \u95ed\u5408\u3002 1\uff09\u9996\u5148\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u4e3a 3 \u79d2\u5373\uff1a\u5bc4\u5b58\u5668 40008=30\n\n\u89e3\u6790\uff1a\u5bc4\u5b58\u5668 40008 \u91cc\u9762\u7684\u5355\u4f4d\u4e3a\u591a\u5c11\uff0c\u8d85\u65f6\u65f6\u95f4\u5c31\u662f\u591a\u5c11 0.1 \u79d2\n\n2\uff09\u518d\u8bbe\u7f6e\u5bf9\u5e94\u7684 \u201c\u6216\u7801\u201d \u548c \u201c\u4e0e\u7801\u201d \u5bc4\u5b58\u5668\u5373\uff1a\n\n40002H=0xF000 \uff081111 0000 0000 0000\uff09\n\n40003H=0xFF00 \uff081111 1111 0000 0000\uff09\n\n\u7ed3\u679c\u662f\uff1a0~7 \u8def\u65ad\u5f00\uff0c8~11 \u8def\u4fdd\u6301\u539f\u6709\u72b6\u6001\uff0c12~15 \u95ed\u5408\n\n3\uff09\u7b49\u5f85\u901a\u4fe1\u4e2d\u65ad 3 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00 00 FF 00 8C 3A\n\n\u5b57\u6bb5\uff08\u5341\u516d\u8fdb\u5236\uff09\u542b\u4e49\u5907\u6ce801\u8bbe\u5907\u5730\u5740\u7ad9\u53f70505 \u6307\u4ee4\u63a7\u5236\u5355\u8def\u6307\u4ee400 00\u5bc4\u5b58\u5668\u5730\u5740\u7ee7\u7535\u5668\u7684\u5bc4\u5b58\u5668\u5730\u574000 FF\u6307\u4ee4\u5f00\u7684\u52a8\u4f5c\uff0800 FF \u4e3a\u5173\uff098C 3ACRC16CRC \u6821\u9a8c\u7801\n\n2.\u8bfb\u53d6\u7ee7\u7535\u5668\u72b6\u6001\n\n\u7ee7\u7535\u5668\u67e5\u8be2(\u67e5\u8be2\u7b2c 1 \u8def)\n\n\u4e0a\u4f4d\u673a\u53d1\u9001\uff1a01 01 00 00 00 01 FD 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8B\n\n\u516d**.**\u4e0a\u4f4d\u673a\u90e8\u5206\n\n\u4e0a\u4f4d\u673a\u8bb2\u89e3\n\n**1.\u53cc\u51fb****\u00a0****app\uff0c\u9009\u62e9\u4e32\u53e3\uff0c\u6ce2\u7279\u7387\uff0c\u70b9\u51fb****\u00a0\u00a0****\u201c\u8fde\u63a5\u201d****\u00a0\u00a0****\u6309\u94ae\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a**\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/11\/20231125120919530.png?x-oss-process=image\/resize,m_lfit,w_950,h_777)\n\n**2.\u8fde\u63a5\u4e0a\u4e4b\u540e\uff0c****\u00a0\u00a0\u00a0****\u70b9\u51fb\u6309\u94ae\u201c\u6253\u5f00\u53c2\u6570\u8bbe\u7f6e\u201d**\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/11\/20231125120933886.png?x-oss-process=image\/resize,m_lfit,w_950,h_818)\n\n3.\u70b9\u51fb\u6309\u94ae\u201c\u8bfb\u53d6\u53c2\u6570\u201d\u3002\u4e0a\u4f4d\u673a\u4f1a\u81ea\u52a8\u83b7\u53d6\u6a21\u5757\u7684\u6240\u6709\u53c2\u6570\u8bbe\u7f6e(\u53c2\u6570\n\n\u8bbe\u7f6e\u5b8c\u4e4b\u540e\uff0c\u8981\u91cd\u542f\u751f\u6548)\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/11\/20231125120947208.png?x-oss-process=image\/resize,m_lfit,w_950,h_636)\n\n4.\u6253\u5f00\u7ee7\u7535\u5668\uff0c\u00a0\u00a0\u00a0\u70b9\u51fb\u6309\u94ae\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/11\/20231125120958657.png?x-oss-process=image\/resize,m_lfit,w_950,h_704)\n\n---\n*modbus.cn*\n"