{"id":1359,"date":"2022-03-19T17:35:27","date_gmt":"2022-03-19T09:35:27","guid":{"rendered":"https:\/\/www.w-bus.com\/?p=1359"},"modified":"2022-03-19T17:35:28","modified_gmt":"2022-03-19T09:35:28","slug":"485modbus%e5%8d%8f%e8%ae%ae%e6%99%ba%e8%83%bd%e7%85%a7%e6%98%8e%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"https:\/\/www.w-bus.com\/2022\/03\/485modbus%e5%8d%8f%e8%ae%ae%e6%99%ba%e8%83%bd%e7%85%a7%e6%98%8e%e7%b3%bb%e7%bb%9f","title":{"rendered":"485ModBus\u534f\u8bae\u667a\u80fd\u7167\u660e\u7cfb\u7edf"},"content":{"rendered":"\n

\u667a\u80fd\u7167\u660e<\/a><\/span>\u7cfb\u7edf\u662f\u968f\u774080\u5e74\u4ee3\u521d\u5355\u7247\u673a\u6280\u672f\u7684\u6210\u719f\u800c\u53d1\u5c55\u8d77\u6765\u7684\uff0c\u73b0\u5728\u4e16\u754c\u667a\u80fd\u63a7\u5236\u5e02\u573a\u57fa\u672c\u88ab\u667a\u80fd\u7167\u660e\u6a21\u5757\u7cfb\u7edf\u6240\u5784\u65ad\u3002\u7a76\u5176\u539f\u56e0\u5c31\u662f\u4f01\u4e1a\u4fe1\u606f\u5316\u7684\u9700\u8981\uff0c\u4f01\u4e1a\u5728\u4eea\u8868\u9009\u578b\u65f6\u5176\u4e2d\u7684\u4e00\u4e2a\u5fc5\u8981\u6761\u4ef6\u5c31\u662f\u8981\u5177\u6709\u8054\u7f51\u901a\u4fe1\u63a5\u53e3\u3002\u6700\u521d\u662f\u6570\u636e\u6a21\u62df\u4fe1\u53f7\u8f93\u51fa\u7b80\u5355\u8fc7\u7a0b\u91cf\uff0c\u540e\u6765\u4eea\u8868\u63a5\u53e3\u662fRS232\u63a5\u53e3\uff0c\u8fd9\u79cd\u63a5\u53e3\u53ef\u4ee5\u5b9e\u73b0\u70b9\u5bf9\u70b9\u7684\u901a\u4fe1\u65b9\u5f0f\uff0c\u4f46\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u80fd\u5b9e\u73b0\u8054\u7f51\u529f\u80fd\u3002\u968f\u540e\u51fa\u73b0\u7684RS485\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n

        \u76ee\u524d\u5728\u667a\u80fd\u7167\u660e\u5f00\u5173\u63a7\u5236\u5668\u7cfb\u7edf\u884c\u4e1a\uff0c\u4e3b\u6d41\u7684\u901a\u8baf\u4e3b\u8981\u4e3aRS485\u901a\u8baf\uff0cCAN\u901a\u8baf\uff0c\u6c83\u601d<\/a><\/span>\u667a\u80fd\u4f5c\u4e3a\u667a\u80fd\u7167\u660e\u5f00\u5173\u63a7\u5236\u5668\u7cfb\u7edf\u884c\u4e1a\u7684\u5148\u950b\uff0c\u4e0d\u65ad\u7684\u63a8\u9648\u51fa\u65b0\uff0c\u76ee\u524d\u4ea7\u54c1\u90fd\u662f\u4f7f\u7528\u7684485\u65b9\u6848\uff0c\u4e0b\u9762\u4e3a\u4e3a\u5927\u5bb6\u8be6\u7ec6\u8bb2\u89e3\u667a\u80fd\u5f00\u5173\u6a21\u5757\u7cfb\u7edf485\u901a\u8baf\u3002<\/p>\n\n\n\n

\u4e2d\u6587\u540d \u667a\u80fd\u4eea\u8868\u5916\u6587\u540drs485 \u7279\u70b91 \u6700\u9ad8\u4f20\u8f93\u901f\u7387\u4e3a10Mbps\u3002 \u7279\u70b92 \u6297\u566a\u58f0\u5e72\u6270\u6027\u597d\u3002 \u7279\u70b93 \u6700\u5927\u7684\u901a\u4fe1\u8ddd\u79bb\u7ea6\u4e3a1219m\uff0c \u63a5\u53e3\u4e24\u7ebf\u5236\u591a\u91c7\u7528\u5c4f\u853d\u53cc\u7ede\u7ebf\u4f20\u8f93\u3002 \u63a5\u53e3\u53d7\u5e72\u6270\u5171\u6a21\u5e72\u6270\u95ee\u9898\uff1b\u7535\u78c1\u517c\u5bb9\u6027\u95ee\u9898\u3002\u7535\u7f06\u5728\u4f4e\u901f\u77ed\u8ddd\u79bb\u65e0\u5e72\u6270\u91c7\u7528\u53cc\u7ede\u7ebf\u5e03\u7f51\u7ec8\u7aef\u5339\u914d\u7684\u603b\u7ebf\u578b\u7ed3\u6784\u957f\u5ea6\u6570\u636e\u4fe1\u53f7\u901f\u7387\u7684\u51fd\u6570\u603b\u7ebf\u91c7\u7528RS-485 \u4e32\u884c\u603b\u7ebf\u6807\u51c6 \u533a \u522b\u4e3b\u8981\u533a\u522b\u5c31\u662f\u903b\u8f91\u5982\u4f55\u8868\u793a<\/p>\n\n\n\n

\u76ee\u5f55<\/p>\n\n\n\n

\u7279\u70b9<\/p>\n\n\n\n

1. RS-485\u7684\u7535\u6c14\u7279\u6027\uff1a\u91c7\u7528\u5dee\u5206\u4fe1\u53f7\u8d1f\u903b\u8f91\uff0c\u903b\u8f91”0\u201d\u4ee5\u4e24\u7ebf\u95f4\u7684\u7535\u538b\u5dee\u4e3a-(2~6)V\u8868\u793a\uff1b\u903b\u8f91”1″\u4ee5\u4e24\u7ebf\u95f4\u7684\u7535\u538b\u5dee\u4e3a+(2~6)V\u8868\u793a\u3002\u63a5\u53e3\u4fe1\u53f7\u7535\u5e73\u6bd4RS-232-C\u964d\u4f4e\u4e86\uff0c\u5c31\u4e0d\u6613\u635f\u574f\u63a5\u53e3\u7535\u8def\u7684\u82af\u7247\uff0c\u4e14\u8be5\u7535\u5e73\u4e0eTTL\u7535\u5e73\u517c\u5bb9\uff0c\u53ef\u65b9\u4fbf\u4e0eTTL\u7535\u8def\u8fde\u63a5\u3002<\/p>\n\n\n\n

2. RS-485\u7684\u6570\u636e\u6700\u9ad8\u4f20\u8f93\u901f\u7387\u4e3a50Mbps\u3002<\/p>\n\n\n\n

3. RS-485\u63a5\u53e3\u662f\u91c7\u7528\u5e73\u8861\u9a71\u52a8\u5668\u548c\u5dee\u5206\u63a5\u6536\u5668\u7684\u7ec4\u5408\uff0c\u6297\u5171\u6a21\u5e72\u6270\u80fd\u529b\u589e\u5f3a\uff0c\u5373\u6297\u566a\u58f0\u5e72\u6270\u6027\u597d\u3002<\/p>\n\n\n\n

4. RS-485\u6700\u5927\u7684\u901a\u4fe1\u8ddd\u79bb\u7ea6\u4e3a1219m\uff0c\u6700\u5927\u4f20\u8f93\u901f\u7387\u4e3a10Mbps\uff0c\u4f20\u8f93\u901f\u7387\u4e0e\u4f20\u8f93\u8ddd\u79bb\u6210\u53cd\u6bd4\uff0c\u5728100KbpS\u7684\u4f20\u8f93\u901f\u7387\u4e0b\uff0c\u624d\u53ef\u4ee5\u8fbe\u5230\u6700\u5927\u7684\u901a\u4fe1\u8ddd\u79bb\uff0c\u5982\u679c\u9700\u4f20\u8f93\u66f4\u957f\u7684\u8ddd\u79bb\uff0c\u9700\u8981\u52a0485\u4e2d\u7ee7\u5668\u3002RS-485\u603b\u7ebf\u4e00\u822c\u6700\u5927\u652f\u630132\u4e2a\u8282\u70b9\uff0c\u5982\u679c\u4f7f\u7528\u7279\u5236\u7684485\u82af\u7247\uff0c\u53ef\u4ee5\u8fbe\u5230128\u4e2a\u6216\u8005256\u4e2a\u8282\u70b9\uff0c\u6700\u5927\u7684\u53ef\u4ee5\u652f\u6301\u5230400\u4e2a\u8282\u70b9\u3002<\/p>\n\n\n\n

\u63a5\u53e3<\/p>\n\n\n\n

RS485\u63a5\u53e3\u7ec4\u6210\u7684\u534a\u53cc\u5de5\u7f51\u7edc\uff0c\u4e00\u822c\u662f\u4e24\u7ebf\u5236\uff08\u4ee5\u524d\u6709\u56db\u7ebf\u5236\u63a5\u6cd5\uff0c\u53ea\u80fd\u5b9e\u73b0\u70b9\u5bf9\u70b9\u7684\u901a\u4fe1\u65b9\u5f0f\uff0c\u73b0\u5f88\u5c11\u91c7\u7528\uff09\uff0c\u591a\u91c7\u7528\u5c4f\u853d\u53cc\u7ede\u7ebf\u4f20\u8f93\u3002\u8fd9\u79cd\u63a5\u7ebf\u65b9\u5f0f\u4e3a\u603b\u7ebf\u5f0f\u62d3\u6251\u7ed3\u6784\u5728\u540c\u4e00\u603b\u7ebf\u4e0a\u6700\u591a\u53ef\u4ee5\u6302\u63a532\u4e2a\u7ed3\u70b9\u3002\u5728\u667a\u80fd\u7167\u660e\u6a21\u5757\u7cfb\u7edf\u7cfb\u7edfRS485\u901a\u4fe1\u7f51\u7edc\u4e2d\u4e00\u822c\u91c7\u7528\u7684\u662f\u4e3b\u4ece\u901a\u4fe1\u65b9\u5f0f\uff0c\u5373\u4e00\u4e2a\u4e3b\u673a\u5e26\u591a\u4e2a\u4ece\u673a\u3002\u5f88\u591a\u60c5\u51b5\u4e0b\uff0c\u8fde\u63a5RS-485\u901a\u4fe1\u94fe\u8def\u65f6\u53ea\u662f\u7b80\u5355\u5730\u7528\u4e00\u5bf9\u53cc\u7ede\u7ebf\u5c06\u5404\u4e2a\u63a5\u53e3\u7684\u201cA\u201d\u3001\u201cB\u201d\u7aef\u8fde\u63a5\u8d77\u6765\u3002RS485\u63a5\u53e3\u8fde\u63a5\u5668\u91c7\u7528DB-9\u76849\u82af\u63d2\u5934\u5ea7\uff0c\u4e0e\u667a\u80fd\u7ec8\u7aefRS485\u63a5\u53e3\u91c7\u7528DB-9\uff08\u5b54\uff09\uff0c\u4e0e\u952e\u76d8\u8fde\u63a5\u7684\u952e\u76d8\u63a5\u53e3RS485\u91c7\u7528DB-9\uff08\u9488\uff09\u3002<\/p>\n\n\n\n

\u53e6\u6709\u4e00\u4e2a\u95ee\u9898\u662f\u4fe1\u53f7\u5730\uff0c\u4e0a\u8ff0\u8fde\u63a5\u65b9\u6cd5\u5728\u8bb8\u591a\u573a\u5408\u662f\u80fd\u6b63\u5e38\u5de5\u4f5c\u7684\uff0c\u4f46\u5374\u57cb\u4e0b\u4e86\u5f88\u5927\u7684\u9690\u60a3\uff0c\u8fd9\u6709\u4e8c\u4e2a\u539f\u56e0\uff1a(1)\u5171\u6a21\u5e72\u6270\u95ee\u9898\uff1a RS-485\u63a5\u53e3\u91c7\u7528\u5dee\u5206\u65b9\u5f0f\u4f20\u8f93\u4fe1\u53f7\uff0c\u5e76\u4e0d\u9700\u8981\u76f8\u5bf9\u4e8e\u67d0\u4e2a\u53c2\u7167\u70b9\u6765\u68c0\u6d4b\u4fe1\u53f7\uff0c\u7cfb\u7edf\u53ea\u9700\u68c0\u6d4b\u4e24\u7ebf\u4e4b\u95f4\u7684\u7535\u4f4d\u5dee\u5c31\u53ef\u4ee5\u4e86\u3002\u4f46\u4eba\u4eec\u5f80\u5f80\u5ffd\u89c6\u4e86\u6536\u53d1\u5668\u6709\u4e00\u5b9a\u7684\u5171\u6a21\u7535\u538b\u8303\u56f4\uff0cRS-485\u6536\u53d1\u5668\u5171\u6a21\u7535\u538b\u8303\u56f4\u4e3a-7\uff5e+12V\uff0c\u53ea\u6709\u6ee1\u8db3\u4e0a\u8ff0\u6761\u4ef6\uff0c\u6574\u4e2a\u7f51\u7edc\u624d\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002\u5f53\u7f51\u7edc\u7ebf\u8def\u4e2d\u5171\u6a21\u7535\u538b\u8d85\u51fa\u6b64\u8303\u56f4\u65f6\u5c31\u4f1a\u5f71\u54cd\u901a\u4fe1\u7684\u7a33\u5b9a\u53ef\u9760\uff0c\u751a\u81f3\u635f\u574f\u63a5\u53e3\u3002(2)EMI(\u7535\u78c1\u517c\u5bb9\u6027)\u95ee\u9898\uff1a\u53d1\u9001\u9a71\u52a8\u5668\u8f93\u51fa\u4fe1\u53f7\u4e2d\u7684\u5171\u6a21\u90e8\u5206\u9700\u8981\u4e00\u4e2a\u8fd4\u56de\u901a\u8def\uff0c\u5982\u6ca1\u6709\u4e00\u4e2a\u4f4e\u963b\u7684\u8fd4\u56de\u901a\u9053\uff08\u4fe1\u53f7\u5730\uff09\uff0c\u4fe1\u53f7\u4e2d\u7684\u5171\u6a21\u90e8\u5206\u5c31\u4f1a\u4ee5\u8f90\u5c04\u7684\u5f62\u5f0f\u8fd4\u56de\u6e90\u7aef\uff0c\u6574\u4e2a\u603b\u7ebf\u5c31\u4f1a\u50cf\u4e00\u4e2a\u5de8\u5927\u7684\u5929\u7ebf\u5411\u5916\u8f90\u5c04\u7535\u78c1\u6ce2\u3002<\/p>\n\n\n\n

\u7531\u4e8ePC\u673a\u9ed8\u8ba4\u7684\u53ea\u6709RS232\u63a5\u53e3\uff0c\u6709\u4e24\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5f97\u5230PC\u4e0a\u4f4d\u673a\u7684RS485\u7535\u8def\uff1a\uff081\uff09\u901a\u8fc7RS232\/RS485\u8f6c\u6362\u7535\u8def\u5c06PC\u673a\u4e32\u53e3RS232\u4fe1\u53f7\u8f6c\u6362\u6210RS485\u4fe1\u53f7\uff0c\u5bf9\u4e8e\u60c5\u51b5\u6bd4\u8f83\u590d\u6742\u7684\u5de5\u4e1a\u73af\u5883\u6700\u597d\u662f\u9009\u7528\u9632\u6d6a\u6d8c\u5e26\u9694\u79bb\u6805\u7684\u4ea7\u54c1\u3002\uff082\uff09\u901a\u8fc7PCI\u591a\u4e32\u53e3\u5361\uff0c\u53ef\u4ee5\u76f4\u63a5\u9009\u7528\u8f93\u51fa\u4fe1\u53f7\u4e3aRS485\u7c7b\u578b\u7684\u6269\u5c55\u5361\u3002<\/p>\n\n\n\n

\u7535\u7f06<\/p>\n\n\n\n

\u5728\u4f4e\u901f\u3001\u77ed\u8ddd\u79bb\u3001\u65e0\u5e72\u6270\u7684\u573a\u5408\u53ef\u4ee5\u91c7\u7528\u666e\u901a\u7684\u53cc\u7ede\u7ebf\uff0c\u53cd\u4e4b\uff0c\u5728\u9ad8\u901f\u3001\u957f\u7ebf\u4f20\u8f93\u65f6\uff0c\u5219\u5fc5\u987b\u91c7\u7528\u963b\u6297\u5339\u914d\uff08\u4e00\u822c\u4e3a120\u03a9\uff09\u7684RS485\u4e13\u7528\u7535\u7f06\uff08STP-120\u03a9\uff08for RS485 & CAN\uff09 one pair 18 AWG\uff09\uff0c\u800c\u5728\u5e72\u6270\u6076\u52a3\u7684\u73af\u5883\u4e0b\u8fd8\u5e94\u91c7\u7528\u94e0\u88c5\u578b\u53cc\u7ede\u5c4f\u853d\u7535\u7f06\uff08ASTP-120\u03a9\uff08for RS485 & CAN\uff09 one pair 18 AWG\uff09\u3002\u5728\u4f7f\u7528RS485\u63a5\u53e3\u65f6\uff0c\u5bf9\u4e8e\u7279\u5b9a\u7684\u4f20\u8f93\u7ebf\u8def\uff0c\u4eceRS485\u63a5\u53e3\u5230\u8d1f\u8f7d\u5176\u6570\u636e\u4fe1\u53f7\u4f20\u8f93\u6240\u5141\u8bb8\u7684\u6700\u5927\u7535\u7f06\u957f\u5ea6\u4e0e\u4fe1\u53f7\u4f20\u8f93\u7684\u6ce2\u7279\u7387\u6210\u53cd\u6bd4\uff0c\u8fd9\u4e2a\u957f\u5ea6\u6570\u636e\u4e3b\u8981\u662f\u53d7\u4fe1\u53f7\u5931\u771f\u53ca\u566a\u58f0\u7b49\u6240\u5f71\u54cd\u3002\u7406\u8bba\u4e0a\uff0c\u901a\u4fe1\u901f\u7387\u5728100Kbps\u53ca\u4ee5\u4e0b\u65f6\uff0cRS485\u7684\u6700\u957f\u4f20\u8f93\u8ddd\u79bb\u53ef\u8fbe1200\u7c73\uff0c\u4f46\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u4f20\u8f93\u7684\u8ddd\u79bb\u4e5f\u56e0\u82af\u7247\u53ca\u7535\u7f06\u7684\u4f20\u8f93\u7279\u6027\u800c\u6240\u5dee\u5f02\u3002\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u91c7\u7528\u589e\u52a0\u4e2d\u7ee7\u7684\u65b9\u6cd5\u5bf9\u4fe1\u53f7\u8fdb\u884c\u653e\u5927\uff0c\u6700\u591a\u53ef\u4ee5\u52a0\u516b\u4e2a\u4e2d\u7ee7\uff0c\u4e5f\u5c31\u662f\u8bf4\u7406\u8bba\u4e0aRS485\u7684\u6700\u5927\u4f20\u8f93\u8ddd\u79bb\u53ef\u4ee5\u8fbe\u523010.8\u516c\u91cc\u3002\u5982\u679c\u771f\u9700\u8981\u957f\u8ddd\u79bb\u4f20\u8f93\uff0c\u53ef\u4ee5\u91c7\u7528\u5149\u7ea4\u4e3a\u4f20\u64ad\u4ecb\u8d28\uff0c\u6536\u53d1\u4e24\u7aef\u5404\u52a0\u4e00\u4e2a\u5149\u7535\u8f6c\u6362\u5668\uff0c\u591a\u6a21\u5149\u7ea4\u7684\u4f20\u8f93\u8ddd\u79bb\u662f5\u523010\u516c\u91cc\uff0c\u800c\u91c7\u7528\u5355\u6a21\u5149\u7ea4\u53ef\u8fbe50\u516c\u91cc\u7684\u4f20\u64ad\u8ddd\u79bb\u3002<\/p>\n\n\n\n

\u6c83\u601d\u667a\u80fd\u667a\u80fd\u7167\u660e\u6a21\u5757\u7cfb\u7edfRS-485\u901a\u8baf\u7535\u7f06\u7ed3\u6784\u56fe\u6c83\u601d\u667a\u80fd\u667a\u80fd\u7167\u660e\u5f00\u5173\u6a21\u5757RS-485\u901a\u8baf\u7535\u7f06\u7ed3\u6784\u56fe<\/p>\n\n\n\n

\u5e03\u7f51<\/p>\n\n\n\n

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\u8fd8\u6709\u4e00\u79cd\u91c7\u7528\u4e8c\u6781\u7ba1\u7684\u5339\u914d\u65b9\u6cd5\uff0c\u8fd9\u79cd\u65b9\u6848\u867d\u672a\u5b9e\u73b0\u771f\u6b63\u7684\u201c\u5339\u914d\u201d\uff0c\u4f46\u5b83\u5229\u7528\u4e8c\u6781\u7ba1\u7684\u94b3\u4f4d\u4f5c\u7528\u80fd\u8fc5\u901f\u524a\u5f31\u53cd\u5c04\u4fe1\u53f7\uff0c\u8fbe\u5230\u6539\u5584\u4fe1\u53f7\u8d28\u91cf\u7684\u76ee\u7684\uff0c\u8282\u80fd<\/a><\/span>\u6548\u679c\u663e\u8457\u3002\u6700\u8fd1\u4e24\u5e74\u4e00\u4e9b\u516c\u53f8\u57fa\u4e8e\u90e8\u5206\u4f01\u4e1a\u4fe1\u606f\u5316\u7684\u5b9e\u65bd\u5df2\u5b8c\u6210\uff0c\u5de5\u5382\u4e2d\u5df2\u7ecf\u94fa\u8bbe\u4e86\u5ef6\u4f38\u5230\u8f66\u95f4\u6bcf\u4e2a\u529e\u516c\u5ba4\u3001\u63a7\u5236\u5ba4\u7684\u5c40\u57df\u7f51\u7684\u73b0\u72b6\uff0c\u63a8\u51fa\u4e86\u4e32\u53e3\u670d\u52a1\u5668\u6765\u53d6\u4ee3\u591a\u4e32\u53e3\u5361\uff0c\u8fd9\u4e3b\u8981\u662f\u5229\u7528\u4f01\u4e1a\u5df2\u6709\u7684\u5c40\u57df\u7f51\u8d44\u6e90\u51cf\u5c11\u7ebf\u8def\u6295\u8d44\uff0c\u8282\u7ea6\u6210\u672c\uff0c\u76f8\u5f53\u4e8e\u901a\u8fc7tcp\/ip\u628a\u591a\u4e32\u53e3\u5361\u653e\u5728\u4e86\u73b0\u573a\u3002<\/p>\n\n\n\n

\u957f\u5ea6<\/p>\n\n\n\n

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\u603b\u7ebf<\/p>\n\n\n\n

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