"# \u6b63\u6cf0DDSU666 \u5355\u76f8\u7535\u80fd\u8868 RS485-MODBUS RTU\u901a\u8baf\u8bf4\u660e\n\n> 2022-07-06 | 2026-07-01\n> https:\/\/www.modbus.cn\/en\/10181.html\n\n**\u8bbe\u5907\u5bc4\u5b58\u5668\u624b\u518c**\n\n---\n\n## \u901a\u8baf\u529f\u80fd\n\n\u4eea\u8868\u91c7\u7528 RS485 \u901a\u4fe1\u65b9\u5f0f,\u6ce2\u7279\u7387\u53ef\u8bbe\u4e3a 1200\u30012400bps\u30014800bps\u30019600bps\u3002\n\u540c\u4e00\u6761\u901a\u8baf\u7ebf\u8def\u4e0a\u6700\u591a\u53ef\u4ee5\u540c\u65f6\u8fde\u63a5 32 \u4e2a\u4eea\u8868\uff0c\u6bcf\u4e2a\u4eea\u8868\u5747\u53ef\u8bbe\u5b9a\u5176\u901a\u8baf\u5730\u5740\uff0c\u901a\u8baf\u8fde\u63a5\u5e94\u4f7f\u7528\u5e26\u6709\u94dc\u7f51\u7684\u5c4f\u853d\u53cc\u7ede\u7ebf\uff0c\u7ebf\u5f84\u4e0d\u5c0f\u4e8e 0.5mm2 \u3002\u5e03\u7ebf\u65f6\u5e94\u4f7f\u901a\u8baf\u7ebf\u8fdc\u79bb\u5f3a\u7535\u7535\u7f06\u6216\u5176\u4ed6\u5f3a\u7535\u573a\u73af\u5883\uff0c\u6700\u5927\u4f20\u8f93\u8ddd\u79bb\u4e3a 1200m\uff0c\u5178\u578b\u7684\u7f51\u7edc\u8fde\u63a5\u65b9\u5f0f\u5982\u56fe\uff0c\u7528\u6237\u53ef\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u7528\u5176\u4ed6\u5408\u9002\u7684\u8fde\u63a5\u65b9\u5f0f\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/07\/image-11.png)\n\nDL\/T 645-2007 \u534f\u8bae\u5207\u6362\u5230 ModBus-RTU \u901a\u8baf\u534f\u8bae\u7684\u6570\u636e\u5e27\u5982\u4e0b\uff1a\n\nFE FE FE FE 68 xx xx xx xx xx xx 68 14 0E 33 33 35 3D 35 33 33 33 33 33 33 33 33 33 **CS** 16\n\n\u6ce8\u610f\uff1axx xx xx xx xx xx \u5373\u4e3a\u5c4f\u663e\u5730\u5740\uff0c\u5982\u7f16\u53f7\u4e3a 21 02 25 02 15 21 \u5219\u586b\u5165 21 15 02 25 02 21,\u586b\u5165\u7684\u662f\u4eea\u8868\u4fa7\u8fb9\u6761\u5f62\u7801\u6807\u53f7\u7684\u5012\u5199.\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/07\/image-10.png)\n\nCS\u4e3a68 xx xx \u81f3 33 33 33\u7684\u6821\u9a8c\u548c\u540e\u4e24\u4f4d\uff0c\u4e0d\u5305\u62ec\u524d\u97624\u4e2aFE\uff1b\n\n\u66f4\u6539\u540emodbus \u5730\u5740\uff0c\u6ce2\u7279\u7387\uff0c\u6570\u636e\u4f4d\uff0c\u6821\u9a8c\u4f4d\uff0c\u505c\u6b62\u4f4d\u4ee5\u4eea\u8868\u5c4f\u5e55\u663e\u793a\u3002\n\n\u9ed8\u8ba4DL\/T645\u8fde\u63a5\u53c2\u6570\u4e3a(8n2\uff0c2400bps)\uff0c\u53d1\u9001\u4e0a\u8ff0\u6307\u4ee4\uff0c\u89c2\u5bdf\u7535\u8868\u5c4f\u663e\uff0c\u5f53\u201cDLT645\u201d\u53d8\u6210\u201cModbus\u201d\u5373\u4e3a\u5207\u6362\u6210\u529f\uff0c\u89c2\u5bdf\u5c4f\u663e\u201cModbus\u201d\u540e\u4e00\u5c4f\u7684\u6570\u5b57\uff0c\u8be5\u6570\u5b57\u4e3a\u7535\u8868\u7684modbus\u4ece\u673a\u5730\u5740\uff0c\u4ee510\u8fdb\u5236\u663e\u793a\uff0c\u6ce8\u610f\uff0cmodbus\u7684\u9ed8\u8ba4\u6ce2\u7279\u7387\u4e3a9600\u3002\n\n\u4eea\u8868\u8bbe\u7f6e\u4e3a ModBus-RTU \u4f20\u8f93\u6a21\u5f0f\u65f6\uff0cModBus-RTU \u901a\u8baf\u534f\u8bae\u5728\u4e00\u6839\u901a\u8baf\u7ebf\u4e0a\u91c7\u7528\u4e3b\u4ece\u5e94\u7b54\u65b9\u5f0f\u7684\u901a\u8baf\u8fde\u63a5\u65b9\u5f0f\u3002\u9996\u5148\uff0c\u4e3b\u8ba1\u7b97\u673a\u7684\u4fe1\u53f7\u5bfb\u5740\u5230\u4e00\u53f0\u552f\u4e00\u5730\u5740\u7684\u7ec8\u7aef\u8bbe\u5907\uff08\u4ece\u673a\uff09\uff0c\u7136\u540e\uff0c\u7ec8\u7aef\u8bbe\u5907\u53d1\u51fa\u7684\u5e94\u7b54\u4fe1\u53f7\u4ee5\u76f8\u53cd\u7684\u65b9\u5411\u4f20\u8f93\u7ed9\u4e3b\u673a\uff0c\u5373\u534a\u53cc\u5de5\u7684\u5de5\u4f5c\u6a21\u5f0f\u3002\u8be5\u534f\u8bae\u53ea\u5141\u8bb8\u5728\u4e3b\u673a\uff08PC\uff0cPLC \u7b49\uff09\u548c\u7ec8\u7aef\u8bbe\u5907\u4e4b\u95f4\u901a\u8baf\uff0c\u800c\u4e0d\u5141\u8bb8\u72ec\u7acb\u7684\u7ec8\u7aef\u8bbe\u5907\u4e4b\u95f4\u7684\u6570\u636e\u4ea4\u6362\uff0c\u8fd9\u6837\u5404\u7ec8\u7aef\u8bbe\u5907\u4e0d\u4f1a\u5728\u5b83\u4eec\u521d\u59cb\u5316\u65f6\u5360\u636e\u901a\u8baf\u7ebf\u8def\uff0c\u800c\u4ec5\u9650\u4e8e\u54cd\u5e94\u5230\u8fbe\u672c\u673a\u7684\u67e5\u8be2\u4fe1\u53f7\u3002\n\u4eea\u8868\u63d0\u4f9b ModBus-RTU \u901a\u8baf\u534f\u8bae(\u89c1\u9644\u5f55 A)\uff0c\u901a\u8baf\u53ef\u8bfb\u53d6\u6216\u4fee\u6539\u7684\u53c2\u6570\u4fe1\u606f\uff0c\u89c1\u4e0b\u8868\u3002\n\n\u53c2\u6570\u5730\u5740\u53c2\u6570\u4ee3\u53f7\u53c2\u6570\u8bf4\u660e\u6570\u636e\u7c7b\u578b\u6570\u636e\u957f\u5ea6Word\u8bfb\u5199\u5c5e\u60270000HUcodE\u7f16\u7a0b\u5bc6\u7801 codEint1R0001HREV.\u8f6f\u4ef6\u7248\u672cint1R\/W0002HCLrE\u7535\u80fd\u6e05\u96f6 CLr.Eint1R\/W0003HRESERVED\u4fdd\u7559int1R\/W0004HRESERVED\u4fdd\u7559int1R\/W0005HChangeProtocol\u534f\u8bae\u5207\u6362\u8bbe\u7f6eint1R\/W0006HAddr\u6b64\u5730\u5740\u53ea\u6709 Modbus-RTU \u65f6\u6709\u6548int1R\/W0007HRESERVED\u4fdd\u7559int1R\/W0008HRESERVED\u4fdd\u7559int1R\/W0009HRESERVED\u4fdd\u7559int1R\/W000AHRESERVED\u4fdd\u7559int1R\/W000BHRESERVED\u4fdd\u7559int1R\/W000CHBAud\u6ce2\u7279\u7387int1R\/W000DHRESERVED\u4fdd\u7559int1R\/W000EHRESERVED\u4fdd\u7559int1R\/W000FHRESERVED\u4fdd\u7559int1R\/W0010HRESERVED\u4fdd\u7559int1R\/W2000HUA \u76f8\u7535\u538bfloat2R\/W2002HIA \u76f8\u7535\u6d41float2R\/W2004HP\u77ac\u65f6\u603b\u6709\u529f\u529f\u7387float2R\/W2006HQ\u77ac\u65f6\u603b\u65e0\u529f\u529f\u7387float2R\/W2008HS\u77ac\u65f6\u603b\u89c6\u5728\u529f\u7387float2R\/W200AHPF\u603b\u529f\u529f\u7387\u56e0\u6570float2R\/W200CHRESERVED\u4fdd\u7559float2R\/W200EHFreq\u7535\u7f51\u9891\u7387float2R\/W2010HRESERVED\u4fdd\u7559float2R\/W4000HEp\u6709\u529f\u603b\u7535\u80fdfloat2R\/W\u901a\u8baf\u53c2\u6570\u4fe1\u606f\n\nChangeProtocol \u534f\u8bae\u5207\u6362\u6a21\u5f0f\u5b57\uff0c\u6570\u636e\u4e3a 2 \u4e3a Modbus-RTU \u534f\u8bae\uff0c\u6570\u636e\u4e3a 1 \u65f6\u4e3a DL\/T 645-2007\u534f\u8bae\uff1b\n\nCLr.E \u7535\u80fd\u6e05\u96f6\u5199 1 \u6e05\u9664\u603b\u7535\u80fd\uff1b\n\nBAud \u6ce2\u7279\u7387:   0:1200bps\uff1b 1:2400bps\uff1b 2:4800bps\uff1b 3:9600bps\uff1b\n\n## \u901a\u8baf\u793a\u4f8b\n\n### \u529f\u80fd\u7801 03H\uff1a\u8bfb\u5bc4\u5b58\u5668\n\n\u4e3b\u673a\u8981\u8bfb\u53d6\u4ece\u673a\u5730\u5740\u4e3a 01H\uff0c\u8d77\u59cb\u5bc4\u5b58\u5668\u5730\u5740\u4e3a 0CH \u7684 2 \u4e2a\u5bc4\u5b58\u5668\u6570\u636e\uff0c\u4e3b\u673a\u53d1\u9001\uff1a\n\n\u5730\u5740\u7801\u529f\u80fd\u7801\u8d77\u59cb\u5bc4\u5b58\u5668\u5730\u5740\u5bc4\u5b58\u5668\u6570\u91cfCRC \u6821\u9a8c\u7801010300 0C00 0204 08\n\n\u5982\u679c\u4ece\u673a\u5bc4\u5b58\u5668 0CH\u30010DH \u7684\u6570\u636e\u4e3a 0000H\u30011388H\uff0c\u4ece\u673a\u8fd4\u56de\uff1a\n\n\u5730\u5740\u7801\u529f\u80fd\u7801\u5b57\u8282\u6570\u5bc4\u5b58\u5668 0CH \u6570\u636e\u5bc4\u5b58\u5668 0DH \u6570\u636eCRC \u6821\u9a8c\u780101030400 0013 88F7 65\n\n### \u529f\u80fd\u7801 10H\uff1a\u5199\u591a\u8def\u5bc4\u5b58\u5668\n\n\u4f8b\u5982\uff1a\u4e3b\u673a\u8981\u628a\u6570\u636e 0002H\u30011388H\u3001000AH \u4fdd\u5b58\u5230\u4ece\u673a\u5730\u5740\u4e3a 01H\uff0c\u8d77\u59cb\u5bc4\u5b58\u5668\u5730\u5740\u4e3a 00H\u7684 3 \u4e2a\u5bc4\u5b58\u5668\u4e2d\u3002\n\n\u4e3b\u673a\u53d1\u9001\uff1a\n\n\u5730\u5740\u7801\u529f\u80fd\u7801\u8d77\u59cb\u5bc4\u5b58\u5668\u5730\u5740\u5bc4\u5b58\u5668\u6570\u91cf\u5199\u5165\u5b57\u8282\u657000H \u5bc4\u5b58\u5668\u5f85\u5199\u5165\u6570\u636e01H \u5bc4\u5b58\u5668\u5f85\u5199\u5165\u6570\u636e02H \u5bc4\u5b58\u5668\u5f85\u5199\u5165\u6570\u636eCRC \u6821\u9a8c\u7801011000 0000 030600 0213 88 00 0A9B E9\n\n\u4ece\u673a\u8fd4\u56de\uff1a\n\n\u5730\u5740\u7801\u529f\u80fd\u7801\u8d77\u59cb\u5bc4\u5b58\u5668\u5730\u5740\u5bc4\u5b58\u5668\u6570\u91cfCRC \u6821\u9a8c\u7801011000 0000 0380 08\n\n## 16 \u4f4dCRC\u6821\u9a8c\u7801\n\n\u4e3b\u673a\u6216\u4ece\u673a\u53ef\u7528\u6821\u9a8c\u7801\u5224\u522b\u63a5\u6536\u4fe1\u606f\u662f\u5426\u6b63\u786e\u3002\u7531\u4e8e\u7535\u5b50\u566a\u58f0\u6216\u4e00\u4e9b\u5176\u5b83\u5e72\u6270\uff0c\u4fe1\u606f\u5728\u4f20\n\n\u8f93\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u53d1\u751f\u9519\u8bef\uff0c\u6821\u9a8c\u7801\u53ef\u4ee5\u68c0\u9a8c\u4e3b\u673a\u6216\u4ece\u673a\u901a\u8baf\u4fe1\u606f\u662f\u5426\u6709\u8bef\u3002\n\n16 \u4f4d CRC \u6821\u9a8c\u7801\u7531\u4e3b\u673a\u8ba1\u7b97\uff0c\u653e\u7f6e\u4e8e\u53d1\u9001\u4fe1\u606f\u5e27\u7684\u5c3e\u90e8\u3002\u4ece\u673a\u518d\u91cd\u65b0\u8ba1\u7b97\u63a5\u6536\u5230\u7684\u4fe1\u606f\u7684CRC\uff0c\u6bd4\u8f83\u8ba1\u7b97\u5f97\u5230\u7684 CRC \u4e0e\u63a5\u6536\u5230\u7684 CRC \u662f\u5426\u4e00\u81f4\uff0c\u5982\u679c\u4e0d\u4e00\u81f4\uff0c\u5219\u8868\u660e\u51fa\u9519\u3002\u5728\u8fdb\u884c CRC \u8ba1\u7b97\u65f6\u53ea\u7528\u5230 8 \u4e2a\u6570\u636e\u4f4d\uff0c\u8d77\u59cb\u4f4d\u53ca\u505c\u6b62\u4f4d\u90fd\u4e0d\u53c2\u4e0e CRC \u8ba1\u7b97\u3002\n\nCRC \u6821\u9a8c\u7801\u8ba1\u7b97\u65b9\u6cd5\u5982\u4e0b\uff1a\n\n1) \u9884\u7f6e 1 \u4e2a 16 \u4f4d\u7684\u5bc4\u5b58\u5668\u4e3a\u5341\u516d\u8fdb\u5236 FFFF\uff08\u5373\u5168\u4e3a 1\uff09\uff0c\u79f0\u6b64\u5bc4\u5b58\u5668\u4e3a CRC \u5bc4\u5b58\u5668\uff1b\n\n2) \u628a\u7b2c\u4e00\u4e2a 8 \u4f4d\u4e8c\u8fdb\u5236\u6570\u636e\uff08\u901a\u8baf\u4fe1\u606f\u5e27\u7684\u7b2c 1 \u4e2a\u5b57\u8282\uff09\u4e0e 16 \u4f4d CRC \u5bc4\u5b58\u5668\u7684\u4f4e 8 \u4f4d\u76f8\u5f02\u6216\uff0c\u7ed3\u679c\u653e\u4e8e CRC \u5bc4\u5b58\u5668\uff1b\n\n3) \u628a CRC \u5bc4\u5b58\u5668\u7684\u5185\u5bb9\u53f3\u79fb\u4e00\u4f4d\uff08\u671d\u4f4e\u4f4d\uff09\u5e76\u7528 0 \u586b\u8865\u6700\u9ad8\u4f4d\uff0c\u68c0\u67e5\u53f3\u79fb\u540e\u7684\u79fb\u51fa\u4f4d\uff1b\n\n4) \u5982\u679c\u79fb\u51fa\u4f4d\u4e3a 0\uff1a\u91cd\u590d\u7b2c 3\uff09\u6b65\uff08\u518d\u6b21\u53f3\u79fb\u4e00\u4f4d\uff09\uff1b\n\n\u5982\u679c\u79fb\u51fa\u4f4d\u4e3a 1\uff1aCRC \u5bc4\u5b58\u5668\u4e0e\u591a\u9879\u5f0f A001\uff081010 0000 0000 0001\uff09\u8fdb\u884c\u5f02\u6216\uff1b\n\n5) \u91cd\u590d\u6b65\u9aa4 3\uff09\u548c 4\uff09\uff0c\u76f4\u5230\u53f3\u79fb 8 \u6b21\uff0c\u8fd9\u6837\u6574\u4e2a 8 \u4f4d\u6570\u636e\u5168\u90e8\u8fdb\u884c\u4e86\u5904\u7406\uff1b\n\n6) \u91cd\u590d\u6b65\u9aa4 2\uff09\u5230\u6b65\u9aa4 5\uff09\uff0c\u8fdb\u884c\u901a\u8baf\u4fe1\u606f\u5e27\u4e0b\u4e00\u4e2a\u5b57\u8282\u7684\u5904\u7406\uff1b\n\n7) \u5c06\u8be5\u901a\u8baf\u4fe1\u606f\u5e27\u6240\u6709\u5b57\u8282\uff08\u4e0d\u5305\u62ec CRC \u6821\u9a8c\u7801\uff09\u6309\u4e0a\u8ff0\u6b65\u9aa4\u8ba1\u7b97\u5b8c\u6210\u540e\uff0c\u5f97\u5230\u7684 CRC \u5bc4\u5b58\u5668\u5185\u5bb9\u5373\u4e3a\uff1a16 \u4f4d CRC \u6821\u9a8c\u7801\u3002\n\n## \u51fa\u9519\u5904\u7406\n\n\u5f53\u4eea\u8868\u68c0\u6d4b\u5230\u4e86\u9664 CRC \u6821\u9a8c\u7801\u51fa\u9519\u4ee5\u5916\u7684\u5176\u5b83\u9519\u8bef\u65f6\uff0c\u5c06\u5411\u4e3b\u673a\u56de\u9001\u4fe1\u606f\uff0c\u529f\u80fd\u7801\u7684\u6700\u9ad8\u4f4d\u7f6e\u4e3a 1\uff0c\u5373\u4ece\u673a\u8fd4\u9001\u7ed9\u4e3b\u673a\u7684\u529f\u80fd\u7801\u662f\u5728\u4e3b\u673a\u53d1\u9001\u7684\u529f\u80fd\u7801\u7684\u57fa\u7840\u4e0a\u52a0 128\u3002\u4ece\u673a\u8fd4\u56de\u7684\u9519\u8bef\u4fe1\u606f\u5e27\u683c\u5f0f\u5982\u4e0b\uff1a\n\n\u5730\u5740\u7801\u529f\u80fd\u7801\uff08\u6700\u9ad8\u4f4d\u4e3a 1\uff09\u9519\u8bef\u7801CRC \u6821\u9a8c\u78011 \u5b57\u82821 \u5b57\u82821 \u5b57\u82822\u5b57\u8282\n\n\u9519\u8bef\u7801\u5982\u4e0b\uff1a\n\n01H\u975e\u6cd5\u7684\u529f\u80fd\u7801\u63a5\u6536\u5230\u7684\u529f\u80fd\u7801\u4eea\u8868\u4e0d\u652f\u630102H\u975e\u6cd5\u7684\u5bc4\u5b58\u5668\u5730\u5740\u63a5\u6536\u5230\u7684\u5bc4\u5b58\u5668\u5730\u5740\u8d85\u51fa\u4eea\u8868\u7684\u5bc4\u5b58\u5668\u5730\u5740\u8303\u56f403H\u975e\u6cd5\u7684\u6570\u636e\u503c\u63a5\u6536\u5230\u7684\u6570\u636e\u503c\u8d85\u51fa\u76f8\u5e94\u5730\u5740\u7684\u6570\u636e\u8303\u56f4\n\n## Modbus\u6280\u672f\u4ea4\u6d41QQ\u7fa4\n\n[![Modbus Poll\u7528\u6237\u624b\u518c\uff08\u4e2d\u6587\u7248\uff09\u63d2\u56fe9](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/05\/2023050513553821.png)](https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/05\/2023050513553821.png)\n\n---\n*modbus.cn*\n"