"# \u521d\u5b66\u8005\u5b9e\u64cd|PLC MODBUS\u901a\u8baf\u793a\u4f8b\n\n> 2023-08-21 | 2026-07-01\n> https:\/\/www.modbus.cn\/en\/24432.html\n\n**Modbus \u534f\u8bae\u6807\u51c6, \u5de5\u4e1a\u7269\u8054\u7f51**\n\n---\n\n\u4e00\u3001Modbus\u901a\u4fe1\u534f\u8bae\r\n\n**Modbus\u534f\u8bae\u53ea\u6709\u4e00\u4e2a\u4e3b\u7ad9**\uff0c\u53ef\u4ee5\u67091~247\u4e2a\u4ece\u7ad9\u3002\u6b64\u534f\u8bae\u652f\u6301\u4f20\u7edf\u7684RS-232\u3001RS-422\u3001RS-485\u548c\u4ee5\u592a\u7f51\u8bbe\u5907\uff0c\u8bb8\u591a\u5de5\u4e1a\u8bbe\u5907\uff0c\u5305\u62ecPLC\uff0cDCS\uff0c\u667a\u80fd\u4eea\u8868\u7b49\u90fd\u5728\u4f7f\u7528Modbus\u534f\u8bae\u4f5c\u4e3a\u4ed6\u4eec\u4e4b\u95f4\u7684\u901a\u4fe1\u6807\u51c6\u3002\n\n\r\n\n\u5f53\u63a7\u5236\u5668\u8bbe\u4e3a\u5728Modbus\u7f51\u7edc\u4e0a\u4ee5RTU\u6a21\u5f0f\u901a\u4fe1\uff0c\u5728\u6d88\u606f\u4e2d\u7684\u6bcf\u4e2a8Bit\u5b57\u8282\u6309\u7167\u539f\u503c\u4f20\u9001\uff0c\u4e0d\u505a\u5904\u7406\uff0c\u598263H\uff0cRTU\u5c06\u76f4\u63a5\u53d1\u900101100011\uff0c\u8fd9\u79cd\u65b9\u5f0f\u7684\u4e3b\u8981\u4f18\u70b9\u662f\u6570\u636e\u5e27\u4f20\u9001\u4e4b\u95f4\u6ca1\u6709\u95f4\u9694\uff0c\u76f8\u540c\u6ce2\u7279\u7387\u4e0b\u4f20\u8f93\u6570\u636e\u7684\u5bc6\u5ea6\u8981\u6bd4ASCII\u9ad8\uff0c\u4f20\u8f93\u901f\u5ea6\u66f4\u5feb\u3002 \n\n\r\n\n**\u4e8c\u3001****ModbusRTU\u4e3b\u7ad9\u6307\u4ee4**\n\n\r\n\n1\u3001Modbus\u5e93\u6307\u4ee4\u5982\u56fe1\u6240\u793a\uff0cMaster\u4e3a\u4e3b\u7ad90\u53e3\uff0cMaster2\u4e3a\u4e3b\u7ad91\u53e3\uff0cSlave\u4e3a\u4ece\u7ad9\uff0c\u4e14\u4ece\u7ad9\u53ea\u67090\u53e3\u3002\n\n\r\n\n\r\n\n\u56fe1\n\n\r\n\n2.**\u897f\u95e8\u5b50Modbus\u5e93\u4e3b\u7ad9**MBUS_CTRL\u7684\u4e3b\u7ad9\u5b9a\u4e49\u53c2\u6570\uff0c\u5982\u56fe2\u6240\u793a\u3002\n\n\r\n\n\r\n\n\u56fe2\n\n\r\n\n\u56fe2\u4e2d\u7b26\u53f7\u8bf4\u660e\u5982\u4e0b\uff1a\n\n\r\n\nEN\uff1a\u4e00\u76f4\u4f7f\u80fd\n\n\r\n\nMODE\uff1a\u5141\u8bb8Modbus\u901a\u4fe1\n\n\r\n\nBaud\uff1a\u901a\u4fe1\u901f\u7387\uff0c\u6ce2\u7279\u7387\uff08\u4e3b\u4ece\u4e00\u81f4\uff09\uff0c\u9ed8\u8ba49600\n\n\r\n\nParity\uff1a\u5947\u5076\u6821\u9a8c\uff0c0\u65e0\u6821\u9a8c\uff0c1\u5947\u6821\u9a8c\uff0c2\u5076\u6821\u9a8c\uff08\u4e3b\u4ece\u4e00\u81f4\uff09\uff0c\u9ed8\u8ba4\u5076\u6821\u9a8c\n\n\r\n\nPort\uff1a\u901a\u4fe1\u7aef\u53e3\uff0c0\u53e3\u81ea\u5e26\uff0c1\u53e3\u6269\u5c55(CM01\u4fe1\u53f7\u677f\uff09\n\n\r\n\nTimeout\uff1a\u6700\u5927\u7b49\u5f85\u65f6\u95f4\u5355\u4f4d\uff1ams\n\n\r\n\nDone\uff1a\u5b8c\u6210\u4f4d\n\n\r\n\nError\uff1a\u9519\u8bef\u4ee3\u7801\uff08\u5f53\u51fa\u73b0\u9519\u8bef\u53ef\u4ee5\u67e5\u770b\u8f6f\u4ef6\u5e2e\u52a9\u76f8\u5bf9\u5e94\u7684\u9519\u8bef\u4ee3\u7801\uff09\n\n\r\n\n**\u897f\u95e8\u5b50Modbus\u5e93\u4e3b\u7ad9MBUS_MSG\u7684\u4e3b\u7ad9\u4fe1\u606f\u8bfb\u5199\u53c2\u6570\uff0c\u5982\u56fe3\u6240\u793a**\n\n\r\n\n\r\n\n\u56fe3\n\n\r\n\n\u56fe3\u4e2d\u7b26\u53f7\u8bf4\u660e\u5982\u4e0b\uff1a\n\n\r\n\nEn\uff1a\u4f7f\u80fd\n\n\r\n\nFirst\uff1a\u9996\u6b21\u626b\u63cf\u7528\u6cbf\u89e6\u53d1\n\n\r\n\nSlave\uff1a\u4ece\u7ad9\u5730\u5740\uff081-247\u4e3b\u7ad9\u9ed8\u8ba42\u53f7\u7ad9\uff0c\u4ece\u7ad9\u5730\u5740\u96642\u4ee5\u5916\uff09\n\n\r\n\nRW\uff1a\u8bfb\u5199\u64cd\u4f5c\uff0c0\u8bfb\uff0c1\u5199\n\n\r\n\nAddr\uff1a\u8bfb\u5199\u5730\u5740\u529f\u80fd\u7801 \n\n\r\n\n\r\n\nCount\uff1a\u6570\u91cf\n\n\r\n\nDataptr\uff1a\u6570\u636e\u6307\u9488 \uff08\u9ed8\u8ba4\u6307\u4e3b\u7ad9\u800c\u4e14\u662f\u4ee5\u5b57\u8282\u7684\u5f62\u5f0f\u663e\u793a\uff09\n\n\r\n\nDone\uff1a\u5b8c\u6210\u4f4d\n\n\r\n\nError\uff1a\u9519\u8bef\u5b57\u8282\uff08\u5f53\u51fa\u73b0\u9519\u8bef\u53ef\u4ee5\u67e5\u770b\u8f6f\u4ef6\u5e2e\u52a9\u76f8\u5bf9\u5e94\u7684\u9519\u8bef\u4ee3\u7801\uff09\n\n\r\n\nSTEP7_Micro\/WIN Smart\u548cS7_200SmartCPU\u652f\u6301\u4e24\u79cdModbus RTU\u4e3b\u7ad9\uff0c\u5bf9\u4e8e\u5355\u4e2aModbus RTU\u4e3b\u7ad9\uff0c\u4f7f\u7528\u6307\u4ee4MBUS_CTRL\u548cMBUS_MSG\uff0c\u5728\u8fdb\u884c0\u53e3\u901a\u4fe1\u65f6\u5e94\u7528\u3002\u5bf9\u4e8e\u7b2c\u4e8c\u4e2aModbus RTU\u4e3b\u7ad9\uff0c\u4f7f\u7528\u6307\u4ee4MBUS_CTRL2\u548c MBUS_MSG2\uff0c\u5728\u8fdb\u884c1\u53e3\u901a\u4fe1\u65f6\u5e94\u7528\u3002\u5982\u679c\u60a8\u5728\u9879\u76ee\u4e2d\u4f7f\u7528\u4e24\u4e2a Modbus \u4e3b\u7ad9\uff0c\u5219\u8981\u786e\u4fdd MBUS_CTRL \u548c MB_CTRL2 \u4f7f\u7528\u4e0d\u540c\u7684\u7aef\u53e3\u53f7\u3002\n\n\r\n\n**MBUS_CTRL\u5199\u5728\u4e3b\u7ad9\u91cc\uff0c\u4e0d\u7ba1\u6709\u591a\u5c11\u4ece\u7ad9\uff0c\u53ea\u5199\u4e00\u6b21\u3002MBUS_MSG \u5199\u5728\u4e3b\u7ad9\u91cc\uff0c\u6bd4\u5982\u6709\u4e00\u4e2a\u4ece\u7ad9\uff0c\u4e3b\u4ece\u4e92\u76f8\u63a7\u5236\uff0c\u9700\u89812\u6761\u6307\u4ee4\uff0c\u4e00\u4e2a\u8bfb\u4e00\u4e2a\u5199\uff0c\u6709\u591a\u4e2a\u4ece\u7ad9\uff0c\u5c31\u5199\u591a\u4e2a\u8bfb\u5199\u6307\u4ee4\u3002**\n\n\r\n\n**\u4e09\u3001****ModbusRTU\u4ece\u7ad9\u6307\u4ee4**\n\n\r\n\r\n\r\n \t- \u897f\u95e8\u5b50Modbus\u5e93\u4ece\u7ad9MBUS_CTRL\u7684\u4ece\u7ad9\u5b9a\u4e49\u53c2\u6570\uff0c\u5982\u56fe4\u6240\u793a\u3002\r\n\r\n\n\r\n\n\u56fe4\n\n\r\n\n\u56fe4\u4e2d\u7b26\u53f7\u8bf4\u660e\u5982\u4e0b\uff1a\n\n\r\n\nEn \u4f7f\u80fd\u7528\u6cbf\u89e6\u53d1\n\n\r\n\nMode \u5141\u8bb8Modbus\u901a\u4fe1\n\n\r\n\nAddr \u4ece\u7ad9\u5730\u5740\uff081-147)\n\n\r\n\nBaud \u901a\u4fe1\u901f\u7387\u6ce2\u7279\u7387\uff08\u4e3b\u4ece\u4e00\u81f4\uff09\u9ed8\u8ba49600\n\n\r\n\nParity \u5947\u5076\u6821\u9a8c0\u65e0\u6821\u9a8c\uff0c1\u5947\u6821\u9a8c\uff0c2\u5076\u6821\u9a8c\uff08\u4e3b\u4ece\u4e00\u81f4\uff09\u9ed8\u8ba4\u5076\u6821\u9a8c\n\n\r\n\nPort \u901a\u4fe1\u7aef\u53e30\u53e3\u81ea\u5e26\n\n\r\n\nDelay \u5ef6\u65f6\n\n\r\n\nMaxIQ \u6700\u5927\u8f93\u5165\u8f93\u51fa\u70b9\u6570256\n\n\r\n\nMaxAI \u6700\u5927\u6a21\u62df\u91cf\u8f93\u516556\n\n\r\n\nMaxhold \u6700\u5927\u7f13\u5b58\u533a\n\n\r\n\nHoldstart \u6700\u5927\u7f13\u5b58\u533a\u8d77\u59cb\u5730\u5740\n\n\r\n\nDone \u5b8c\u6210\u4f4d\n\n\r\n\nError \u9519\u8bef\u5b57\u8282\n\n\r\n\nDone \u5b8c\u6210\u4f4d\n\n\r\n\nError \u9519\u8bef\u5b57\u8282\n\n\r\n\n2.\u897f\u95e8\u5b50Modbus\u5e93\u4ece\u7ad9MBUS_SLAVE\u7684\u4ece\u7ad9\u5e94\u7b54\u53c2\u6570\uff0c\u5982\u56fe5\u6240\u793a\u3002\n\n\r\n\n\r\n\n\u56fe5\n\n\r\n\n**\u56db\u3001****\u901a\u4fe1\u7a0b\u5e8f\u7f16\u5199**\n\n\r\n\n**ModbusRTU\u4e24\u53f0PLC\u4e92\u76f8\u63a7\u5236\u901a\u4fe1\u793a\u4f8b**\n\n\r\n\nModbusRTU \u4e24\u53f0PLC\u5206\u522b\u7528I\u70b9\u76f8\u4e92\u63a7\u5236Q\u70b9\uff0c\u4e3b\u7ad9\u7a0b\u5e8f\u5982\u56fe6\u6240\u793a\uff0c\u4ece\u7ad9\u7a0b\u5e8f\u5982\u56fe7\u6240\u793a\u3002\u5199\u4ece\u7ad9\u7a0b\u5e8f\u9700\u8981\u6ce8\u610f\uff0c\u4ece\u7ad9\u5b9a\u4e49\u9700\u8981\u7528\u6cbf\u89e6\u53d1\uff0c\u5728\u7cfb\u7edf\u5757\u8bb0\u5f97\u66f4\u6539\u4ece\u7ad9PLC\u7ad9\u5730\u5740\u3002\n\n\r\n\n\r\n\n\r\n\n\r\n\n\u56fe6\n\n\r\n\n\r\n\n\r\n\n\u56fe7\n\n\r\n\n**ModbusRTU\u4e24\u53f0PLC\u661f\u4e09\u89d2\u901a\u4fe1\u793a\u4f8b**\n\n\r\n\n\u4e24\u53f0PLC\uff0c\u4e3b\u7ad9\u63a7\u5236\u4ece\u7ad9\u7684\u661f\u4e09\u89d2\u542f\u52a8\u505c\u6b62\uff0c\u4e3b\u7ad9IW0\u63a7\u5236\u4ece\u7ad9VW0\uff08I0.0-V0.0\u542f\u52a8\uff0cI0.1-V0.1\u505c\u6b62\uff09\uff0c\u4e3b\u7ad9\u7a0b\u5e8f\u5982\u56fe1-1\u56fe1-2\u6240\u793a\uff0c\u4ece\u7ad9\u7a0b\u5e8f\u5982\u56fe1-3\u56fe1-4\u56fe1-5\u56fe1-6\u56fe1-7\u56fe1-8\u6240\u793a\u3002\n\n\r\n\n\r\n\n\u56fe1-1\n\n\r\n\n\r\n\n\u56fe1-2\n\n\r\n\n\r\n\n\u56fe1-3\n\n\r\n\n\r\n\n\u56fe1-4\n\n\r\n\n\r\n\n\u56fe1-5\n\n\r\n\n\r\n\n\u56fe1-6\n\n\r\n\n\r\n\n\u56fe1-7\n\n\r\n\n\r\n\n\u56fe1-8\n\n\r\n\n**ModbusRTU\u4e09\u53f0PLC\u661f\u4e09\u89d2\u901a\u4fe1\u793a\u4f8b**\n\n\r\n\r\n\r\n \t- \u4e09\u53f0PLC\u901a\u4fe1\u4e3b\u7ad9\u30013\u53f7\u4ece\u7ad9\u548c4\u4ece\u7ad9\uff0c3\u53f7\u548c4\u53f7\u4e4b\u95f4\u4e92\u76f8\u63a7\u5236\u4e24\u53f0\u7535\u673a\u7684\u542f\u505c\u5982\u56fe2-1\u6240\u793a\uff0c\u63a7\u5236\u7a0b\u5e8f\u5982\u56fe2-2\u56fe2-3\u56fe2-4\u56fe2-5\u56fe2-6\u56fe2-7\u6240\u793a\u3002\r\n\r\n\n\r\n\n\u56fe2-1\n\n\r\n\n\r\n\n\u56fe2-2\n\n\r\n\n\r\n\n\u56fe2-3\n\n\r\n\n\r\n\n\u56fe2-4\n\n\r\n\n\r\n\n\u56fe2-5\n\n\r\n\n\r\n\n\u56fe2-6\n\n\r\n\n\r\n\n\u56fe2-7\n\n\r\n\n2.\u4e09\u53f0PLC\u901a\u4fe1\u4e3b\u7ad9\u30013\u53f7\u4ece\u7ad9\u548c4\u4ece\u7ad9\uff0c3\u53f7\u548c4\u53f7\u4e4b\u95f4\u4e92\u76f8\u63a7\u5236\u4e24\u53f0\u7535\u673a\u7684\u542f\u505c\uff0c3\u53f7\u4ece\u7ad9\u63a7\u5236\u7a0b\u5e8f\u5982\u56fe2-8\u56fe2-9\u56fe2-10\u6240\u793a\u3002\n\n\r\n\n\r\n\n\u56fe2-8\n\n\r\n\n\r\n\n\u56fe2-9\n\n\r\n\n\r\n\n\u56fe2-10\n\n\r\n\n3.\u4e09\u53f0PLC\u901a\u4fe1\u4e3b\u7ad9\u30013\u53f7\u4ece\u7ad9\u548c4\u4ece\u7ad9\uff0c3\u53f7\u548c4\u53f7\u4e4b\u95f4\u4e92\u76f8\u63a7\u5236\u4e24\u53f0\u7535\u673a\u7684\u542f\u505c\uff0c4\u53f7\u4ece\u7ad9\u63a7\u5236\u7a0b\u5e8f\u5982\u56fe2-11\u56fe2-12\u56fe2-13\u6240\u793a\u3002\n\n\r\n\n\r\n\n\u56fe2-11\n\n\r\n\n\r\n\n\u56fe2-12\n\n\r\n\n\r\n\n\u56fe2-13\n\n\r\n\n**\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u8981\u8bb0\u5f97\u66f4\u6539\u4e09\u53f7\u7ad9\u548c\u56db\u53f7\u7ad9\u5728\u7cfb\u7edf\u5757\u5185\u7684\u5730\u5740\uff0c\u4ece\u7ad9\u5b9a\u4e49\u7528\u6cbf\u6765\u89e6\u53d1\u3002\u6700\u540e\u8bb0\u5f97\u5728\u7a0b\u5e8f\u5757\u4e2d\u8bbe\u7f6e\u5e93\u5b58\u50a8\u533a\u7684\u5206\u914d\u5982\u56fe2-14\u3002**\n\n\r\n\n\r\n\n\u56fe2-14\n\n---\n*modbus.cn*\n"