{"id":285,"date":"2023-04-06T16:05:30","date_gmt":"2023-04-06T08:05:30","guid":{"rendered":"https:\/\/yajtech.synology.me\/wordpress\/?p=285"},"modified":"2023-04-07T09:43:20","modified_gmt":"2023-04-07T01:43:20","slug":"modbus-rtu","status":"publish","type":"post","link":"https:\/\/www.yaj.com.tw\/wordpress\/?p=285","title":{"rendered":"Modbus RTU"},"content":{"rendered":"\n<p>\u7c21\u4ecb<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">Modbus\u662f\u4e00\u7a2e\u4e32\u884c\u901a\u4fe1\u5354\u5b9a\uff0c\u662fModicon\u516c\u53f8\uff08\u73fe\u5728\u7684\u65bd\u8010\u5fb7\u96fb\u6c23\u00a0Schneider Electric\uff09\u65bc1979\u5e74\u70ba\u4f7f\u7528\u53ef\u7a0b\u5f0f\u5316\u908f\u8f2f\u63a7\u5236\u5668\uff08PLC\uff09\u901a\u4fe1\u800c\u767c\u8868\u3002Modbus\u5df2\u7d93\u6210\u70ba\u5de5\u696d\u9818\u57df\u901a\u4fe1\u5354\u5b9a\u4e8b\u5be6\u4e0a\u7684\u696d\u754c\u6a19\u6e96\uff0c\u4e26\u4e14\u73fe\u5728\u662f\u5de5\u696d\u96fb\u5b50\u88dd\u7f6e\u4e4b\u9593\u5e38\u7528\u7684\u9023\u63a5\u65b9\u5f0f\u3002Modbus\u6bd4\u5176\u4ed6\u901a\u4fe1\u5354\u5b9a\u4f7f\u7528\u7684\u66f4\u5ee3\u6cdb\u7684\u4e3b\u8981\u539f\u56e0\u6709\uff1a l\u516c\u958b\u767c\u8868\u4e26\u4e14\u7121\u8457\u4f5c\u6b0a\u8981\u6c42 l\u6613\u65bc\u90e8\u7f72\u548c\u7dad\u8b77 l\u5c0d\u4f9b\u61c9\u5546\u4f86\u8aaa\uff0c\u4fee\u6539\u79fb\u52d5\u539f\u751f\u7684\u4f4d\u5143\u6216\u4f4d\u5143\u7d44\u6c92\u6709\u5f88\u591a\u9650\u5236\n\nModbus\u5141\u8a31\u591a\u500b (\u61c9\u8a72\u662f\uff1a254\u500b) \u88dd\u7f6e\u9023\u63a5\u5728\u540c\u4e00\u500b\u7db2\u8def\u4e0a\u9032\u884c\u901a\u4fe1\uff0c\u8209\u500b\u4f8b\u5b50\uff0c\u4e00\u500b\u7531\u6e2c\u91cf\u6eab\u5ea6\u548c\u6fd5\u5ea6\u7684\u88dd\u7f6e\uff0c\u4e26\u4e14\u5c07\u7d50\u679c\u50b3\u9001\u7d66\u96fb\u8166\u3002\u5728\u8cc7\u6599\u63a1\u96c6\u8207\u76e3\u8996\u63a7\u5236\u7cfb\u7d71\uff08SCADA\uff09\u4e2d\uff0cModbus\u901a\u5e38\u7528\u4f86\u9023\u63a5\u76e3\u8996\u96fb\u8166\u548c\u9060\u7aef\u7d42\u7aef\u63a7\u5236\u7cfb\u7d71\uff08RTU\uff09\u3002<\/pre>\n\n\n\n<p>Protocol(\u901a\u8a0a\u5354\u5b9a)<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">Modbus\u5354\u5b9a\u76ee\u524d\u5b58\u5728\u7528\u65bc\u5e8f\u5217\u57e0\u3001\u4e59\u592a\u7db2\u8def\u4ee5\u53ca\u5176\u4ed6\u652f\u6301\u7db2\u969b\u7db2\u8def\u5354\u5b9a\u7684\u7db2\u8def\u7684\u7248\u672c\u3002\n\u5927\u591a\u6578Modbus\u88dd\u7f6e\u901a\u4fe1\u901a\u904e\u5e8f\u5217\u57e0EIA-485\u5be6\u9ad4\u5c64\u9032\u884c\u3002\n<\/pre>\n\n\n\n<p id=\"block-a3f6ce3c-fc6a-4a93-8ccf-f9cc5ae14701\">Modbus \u4e00\u822c\u6709\u4e09\u7a2e\u901a\u8a0a\u5354\u5b9a<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>\u901a\u8a0a\u5354\u5b9a<\/strong><\/td><td><strong>\u901a\u8a0a\u5a92\u4ecb<\/strong><\/td><td><strong>\u7de8\u78bc\u7cfb\u7d71<\/strong><\/td><td><strong>\u6821\u9a57\u78bc<\/strong><\/td><\/tr><tr><td>ASCII<\/td><td>\u4e32\u5217<\/td><td>ASCII(0\u20139, A\u2013F )<\/td><td>LRC<\/td><\/tr><tr><td>RTU<\/td><td>\u4e32\u5217<\/td><td>8\u2013bit binary<\/td><td>CRC16<\/td><\/tr><tr><td>TCP<\/td><td>\u7db2\u8def\/TCP<\/td><td>8\u2013bit binary<\/td><td>by TCP checksum<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5b57\u5143\u683c\u5f0f\uff1a\u540c\u4e00\u7dda\u8def\u4e0b\uff0c\u6240\u4ee5\u7684\u9031\u908a\u63a1\u7528\u7684\u5b57\u5143\u683c\u5f0f\u5b9a\u7fa9\u9700\u8981\u76f8\u540c\uff0c\u5e38\u898b\u7684\u662f8N1<\/p>\n\n\n\n<p>RTU \u901a\u8a0a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4e3b\u5f9e\u67b6\u69cb\uff1a\u4e00\u500b\u4e3b\u7ad9(Master)\uff0c \u591a\u500b\u5f9e\u7ad9(Slave\uff0c \u4e00\u500b\u5f9e\u7ad9\u4e5f\u53ef\u4ee5)\u3002\u4ee5\u534a\u96d9\u5de5\u65b9\u5f0f\u901a\u8a0a\u3002 <\/li><li>ADDR\uff1a \u4e00\u500b\u81f3\u591a\u500b\u5f9e\u7ad9,\u4ee5\u7ad9\u865f(Byte, 0~255\uff0c <span style=\"color:#ff0000\" class=\"has-inline-color\">\u4e00\u822c 0 \u8ddf 255 \u4fdd\u7559\u7d66\u7279\u5b9a\u7528\u9014<\/span>)\u4f86\u5340\u5206\uff0c\u4e00\u500b\u901a\u8a0a\u88dd\u7f6e(\u5f9e\u7ad9)\u5206\u914d\u4e00\u500b\u7ad9\u865f.(\u4e3b\u7ad9\u4e0d\u9700\u8981\u7ad9\u865f!) <\/li><li>Master \u4e3b\u5bb0\u7684\u901a\u8a0a\u79e9\u5e8f\uff1a\u53ea\u6709Master \u53ef\u4ee5\u767c\u51fa\u901a\u8a0a\u8981\u6c42, \u5c0d\u61c9\u7ad9\u865f\u7684Slave\u56de\u61c9\u901a\u8a0a\u8981\u6c42. <\/li><\/ul>\n\n\n\n<p>Timeout \u6a5f\u5236 (\u903e\u6642\u4e2d\u6b62)<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">Timeout\u662fMODBUS\u901a\u8a0a\u4e2d\u4e00\u5b9a\u6703\u7528\u5230\u7684\u7b2c\u4e00\u500b\u6982\u5ff5\u3002\u7279\u5225\u662f\u5728RTU\u50b3\u9001\u6a21\u5f0f\u4e0b\uff0c\u56e0\u70ba\u901a\u8a0a\u78bc\u88e1\u9762\u4e26\u6c92\u6709\u7d50\u675f\u78bc\u7684\u8a2d\u8a08\u3002\u6240\u4ee5\u53ea\u80fd\u900f\u904e\u201c\u7d93\u904e\u591a\u4e45\u6642\u9593\u6c92\u6709\u5728\u9001\u8cc7\u6599\u201d\u4f86\u5224\u65b7\u5b83\u5df2\u7d93\u7d50\u675f\u4e86\u3002\u9019\u500b\u7b49\u5f85\u6642\u9593\u4e00\u822c\u4f86\u8aaa\u662f5~10 \u500bBytes\u7684\u6642\u9593\u9593\u9694\u3002\u62ff9600bps\u7684\u9b91\u7387\u4f86\u770b\uff0c1\u500bByte\u7d04\u97001mS\u3002\u90a3\u9ebc\u9069\u7576\u7684Timout\u6642\u9593\u5c31\u662f5mS~10mS\u3002<\/pre>\n\n\n\n<p> \u70ba\u4ec0\u9ebc\u8981\u9019\u6a23\u8a2d\u5b9a?<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u56e0\u70ba\u8cc7\u6599\u5728\u50b3\u9001\u7684\u904e\u7a0b\uff0c\u4e3b\u63a7\u7aef\u6709\u53ef\u80fd\u53d7\u5230\u5176\u5b83\u591a\u5de5\u904b\u4f5c\u7684\u5f71\u97ff\u3002\u5c0e\u81f4\u6307\u4ee4\u4e26\u4e0d\u662f\u9023\u7e8c\u9001\u51fa\u4f86\u7684\uff0c\u628aTimeout\u8a2d\u5f97\u592a\u4f4e\u3002\u6709\u53ef\u80fd\u7576\u6307\u4ee4\u50b3\u5230\u4e00\u534a\u6642\uff0c\u88dd\u7f6e\u5c31\u958b\u59cb\u5206\u6790\u6307\u4ee4\u4e86\u3002\u9019\u6a23\u4e00\u4f86\uff0c\u6307\u4ee4\u5206\u6790\u4e00\u5b9a\u6703\u932f\u8aa4\uff0c\u88dd\u7f6e\u4e5f\u5c31\u4e0d\u6703\u6b63\u78ba\u52d5\u4f5c\u53ca\u56de\u61c9\u4e86!!\u3002<\/pre>\n\n\n\n<p>CMD \u901a\u8a0a\u529f\u80fd\u78bc<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"844\" height=\"281\" src=\"https:\/\/yajtech.synology.me\/wordpress\/wp-content\/uploads\/2023\/04\/image.png\" alt=\"\" class=\"wp-image-293\" srcset=\"https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image.png 844w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-300x100.png 300w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-768x256.png 768w\" sizes=\"auto, (max-width: 844px) 100vw, 844px\" \/><\/figure>\n\n\n\n<p>Master \u4e2d\uff0c\u529f\u80fd\u78bc\u70ba3\u7684\u7bc4\u4f8b<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"894\" height=\"367\" src=\"https:\/\/yajtech.synology.me\/wordpress\/wp-content\/uploads\/2023\/04\/image-1.png\" alt=\"\" class=\"wp-image-294\" srcset=\"https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-1.png 894w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-1-300x123.png 300w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-1-768x315.png 768w\" sizes=\"auto, (max-width: 894px) 100vw, 894px\" \/><\/figure>\n\n\n\n<p>\u539f\u59cb\u6587\u4ef6\u7684\u8aaa\u660e<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"523\" height=\"635\" src=\"https:\/\/yajtech.synology.me\/wordpress\/wp-content\/uploads\/2023\/04\/image-3.png\" alt=\"\" class=\"wp-image-296\" srcset=\"https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-3.png 523w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-3-247x300.png 247w\" sizes=\"auto, (max-width: 523px) 100vw, 523px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"431\" height=\"623\" src=\"https:\/\/yajtech.synology.me\/wordpress\/wp-content\/uploads\/2023\/04\/image-2.png\" alt=\"\" class=\"wp-image-295\" srcset=\"https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-2.png 431w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-2-208x300.png 208w\" sizes=\"auto, (max-width: 431px) 100vw, 431px\" \/><\/figure>\n\n\n\n<p>Slave \u7684\u56de\u50b3<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"815\" height=\"277\" src=\"https:\/\/yajtech.synology.me\/wordpress\/wp-content\/uploads\/2023\/04\/image-4.png\" alt=\"\" class=\"wp-image-297\" srcset=\"https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-4.png 815w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-4-300x102.png 300w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-4-768x261.png 768w\" sizes=\"auto, (max-width: 815px) 100vw, 815px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"591\" height=\"382\" src=\"https:\/\/yajtech.synology.me\/wordpress\/wp-content\/uploads\/2023\/04\/image-5.png\" alt=\"\" class=\"wp-image-298\" srcset=\"https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-5.png 591w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-5-300x194.png 300w\" sizes=\"auto, (max-width: 591px) 100vw, 591px\" \/><\/figure>\n\n\n\n<p>\u539f\u59cb\u6587\u4ef6\u8aaa\u660e<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"467\" height=\"718\" src=\"https:\/\/yajtech.synology.me\/wordpress\/wp-content\/uploads\/2023\/04\/image-6.png\" alt=\"\" class=\"wp-image-299\" srcset=\"https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-6.png 467w, https:\/\/www.yaj.com.tw\/wordpress\/wp-content\/uploads\/2023\/04\/image-6-195x300.png 195w\" sizes=\"auto, (max-width: 467px) 100vw, 467px\" \/><\/figure>\n\n\n\n<p>Check Sum \u8a08\u7b97<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u539f\u5ee0\u6587\u4ef6\u5167\u6240\u9644\u7684\u7a0b\u5f0f\u78bc(<a href=\"https:\/\/modbus.org\/docs\/PI_MBUS_300.pdf%20Page114\">https:\/\/modbus.org\/docs\/PI_MBUS_300.pdf Page114<\/a>)\uff0c\u53e6\u53ef\u5728\u7db2\u9801\u53e6\u884c\u9032\u884c\u6aa2\u67e5\u00a0 https:\/\/www.lammertbies.nl\/comm\/info\/crc-calculation<\/pre>\n\n\n\n<p>Savle Error Code<\/p>\n\n\n\n<p>\u7576master\u50b3\u9001\u7684request\u4e0d\u7b26\u5408\u683c\u5f0f\u3001slave\u4e0d\u652f\u63f4\u6b64\u529f\u80fd\u7b49\u554f\u984c\u6642\uff0c\u4ee3\u8868slave\u4e0d\u80fd\u6b63\u78ba\u89e3\u78bcrequest\u5167\u5bb9\uff0c\u9019\u6642slave\u5c31\u6703response\u4e00\u500berror response\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Slave ID=Original <\/li><li>Error Code=Function code + 0x80 <\/li><li>Exception Code=01, 02, 03, 04, etc(\u4f9d\u7167\u767c\u751f\u932f\u8aa4\u7684\u539f\u56e0) <\/li><li>CRC\u6821\u6b63\u78bc<\/li><\/ul>\n\n\n\n<p>Slave Response Error  packge<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>Slave \u5730\u5740<\/td><td>\u529f\u80fd\u78bc<\/td><td>\u7570\u5e38\u78bc<\/td><td>CRC<\/td><\/tr><tr><td> Original  <\/td><td> Function code + 0x80  <\/td><td> Exception Code <\/td><td> CRC\u6821\u6b63\u78bc <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u7570\u5e38\u4ee3\u78bc\uff08Exception Codes\uff09<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>\u529f\u80fd\u78bc<\/td><td>\u540d\u7a31<\/td><td>\u8aaa\u660e<\/td><\/tr><tr><td>01<\/td><td>ILLEGAL<\/td><td>\u4e0d\u652f\u63f4\u7684\u529f\u80fd<\/td><\/tr><tr><td>02<\/td><td>ILLEGAL DATA ADDRESS<\/td><td>\u4e0d\u5408\u6cd5\u7684\u5730\u5740<\/td><\/tr><tr><td>03<\/td><td>ILLEGAL DATA VALUE<\/td><td>\u4e0d\u5408\u6cd5\u7684\u6578\u503c<\/td><\/tr><tr><td>04<\/td><td>SLAVE DEVICE FAILURE<\/td><td>Salve \u8a2d\u5099\u5931\u6548<\/td><\/tr><tr><td>05<\/td><td>ACKNOWLEDGE<\/td><td>\u78ba\u8a8d\uff08\u547d\u4ee4\u57f7\u884c\u4e2d\uff09<\/td><\/tr><tr><td>06<\/td><td>SLAVE DEVICE BUSY<\/td><td>Slave \u8a2d\u5099\u5fd9\u9304<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u53c3\u8003\u6587\u4ef6\u53ca\u7db2\u7ad9<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/modbus.org\/docs\/PI_MBUS_300.pdf\">https:\/\/modbus.org\/docs\/PI_MBUS_300.pdf<\/a><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u7c21\u4ecb Modbus\u662f\u4e00\u7a2e\u4e32\u884c\u901a\u4fe1\u5354\u5b9a\uff0c\u662fModicon\u516c\u53f8\uff08\u73fe\u5728\u7684\u65bd\u8010\u5fb7\u96fb\u6c23\u00a0Schneider Electr &#8230; <a title=\"Modbus RTU\" class=\"read-more\" href=\"https:\/\/www.yaj.com.tw\/wordpress\/?p=285\" aria-label=\"\u95b1\u8b80\u3008Modbus RTU\u3009\u5168\u6587\">\u95b1\u8b80\u5168\u6587<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[26],"class_list":["post-285","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-protocol"],"_links":{"self":[{"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/285","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=285"}],"version-history":[{"count":3,"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/285\/revisions"}],"predecessor-version":[{"id":300,"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/285\/revisions\/300"}],"wp:attachment":[{"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=285"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=285"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yaj.com.tw\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=285"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}