{"id":77849,"date":"2024-01-04T10:40:52","date_gmt":"2024-01-04T02:40:52","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=77849"},"modified":"2024-01-04T10:40:52","modified_gmt":"2024-01-04T02:40:52","slug":"understanding-rs485-communication-protocol-2","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/77849.html","title":{"rendered":"Understanding RS485 Communication Protocol"},"content":{"rendered":"

  RS485\u901a\u8baf\u534f\u8bae\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u4e32\u884c\u901a\u8baf\u534f\u8bae\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5de5\u4e1a\u63a7\u5236\u3001\u5efa\u7b51\u81ea\u52a8\u5316\u548c\u6570\u636e\u4f20\u8f93\u9886\u57df\u3002\u4eca\u5929\u6211\u4eec\u5c06\u4ecb\u7ecdRS485\u901a\u8baf\u534f\u8bae\u7684\u57fa\u672c\u539f\u7406\u3001\u7279\u70b9\u4ee5\u53ca\u5e94\u7528\u573a\u666f\uff0c\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u8fd9\u4e00\u5173\u952e\u6280\u672f\u3002<\/p>\n

RS485\u901a\u8baf\u534f\u8bae\u7b80\u4ecb<\/h2>\n

  RS485\u901a\u8baf\u534f\u8bae\uff0c\u53c8\u79f0\u4e3aEIA-485\uff0c\u662f\u4e00\u79cd\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5de5\u4e1a\u63a7\u5236\u9886\u57df\u7684\u4e32\u884c\u901a\u8baf\u6807\u51c6\u3002\u5176\u7279\u70b9\u5305\u62ec\u652f\u6301\u591a\u70b9\u901a\u8baf\u3001\u9ad8\u6297\u5e72\u6270\u80fd\u529b\u3001\u8fdc\u8ddd\u79bb\u4f20\u8f93\u7b49\u3002RS485\u901a\u8baf\u534f\u8bae\u5e38\u7528\u4e8e\u9700\u8981\u53ef\u9760\u6570\u636e\u4f20\u8f93\u548c\u957f\u8ddd\u79bb\u901a\u8baf\u7684\u573a\u5408\u3002<\/p>\n

  RS485<\/a>\u901a\u8baf\u539f\u7406<\/h3>\n

  RS485\u901a\u8baf\u534f\u8bae\u91c7\u7528\u5dee\u5206\u4fe1\u53f7\u4f20\u8f93\u673a\u5236\uff0c\u4f7f\u7528\u4e24\u6839\u5bfc\u7ebf\u8fdb\u884c\u901a\u8baf\uff0c\u4e00\u6839\u4e3a\u6570\u636e\u7ebfB\uff0c\u4e00\u6839\u4e3a\u6570\u636e\u7ebfA\uff0c\u540c\u65f6\u643a\u5e26\u6570\u636e\u4fe1\u53f7\u7684\u7535\u5e73\u3002\u8fd9\u79cd\u5dee\u5206\u4fe1\u53f7\u4f20\u8f93\u53ef\u4ee5\u6709\u6548\u62b5\u6297\u7535\u78c1\u5e72\u6270\u548c\u566a\u58f0\uff0c\u4f7f\u5f97RS485\u901a\u8baf\u5728\u5de5\u4e1a\u73af\u5883\u4e2d\u80fd\u591f\u7a33\u5b9a\u53ef\u9760\u5730\u5de5\u4f5c\u3002<\/p>\n

  RS485\u901a\u8baf\u7279\u70b9<\/h3>\n

  RS485\u901a\u8baf\u534f\u8bae\u652f\u6301\u6700\u591a128\u4e2a\u8282\u70b9\u7684\u591a\u70b9\u901a\u8baf\uff0c\u56e0\u6b64\u9002\u7528\u4e8e\u590d\u6742\u7684\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u3002\u6b64\u5916\uff0cRS485\u80fd\u591f\u5b9e\u73b01200\u7c73\u7684\u8fdc\u8ddd\u79bb\u901a\u8baf\uff0c\u4f7f\u5176\u5728\u5927\u578b\u5de5\u5382\u548c\u5efa\u7b51\u81ea\u52a8\u5316\u7b49\u573a\u666f\u4e2d\u5f97\u5230\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n

\u5e94\u7528\u573a\u666f<\/h2>\n

  RS485\u901a\u8baf\u534f\u8bae\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5de5\u4e1a\u81ea\u52a8\u5316\u7cfb\u7edf\u3001\u73af\u5883\u76d1\u6d4b<\/a>\u3001\u5b89\u4fdd\u76d1\u63a7\u3001\u667a\u80fd\u697c\u5b87\u7b49\u9886\u57df\u3002\u4f8b\u5982\uff0c\u5728\u81ea\u52a8\u5316\u751f\u4ea7\u7ebf\u4e2d\uff0c\u5404\u7c7b\u4f20\u611f\u5668\u3001\u6267\u884c\u5668\u3001PLC\u7b49\u8bbe\u5907\u901a\u8fc7RS485\u901a\u8baf\u534f\u8bae\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u548c\u63a7\u5236\u3002<\/p>\n

  \u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf<\/h3>\n

  \u5728\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u4e2d\uff0cRS485\u901a\u8baf\u534f\u8bae\u5e38\u7528\u4e8e\u8fde\u63a5\u5404\u7c7b\u4f20\u611f\u5668\u3001\u6267\u884c\u5668\u3001\u63a7\u5236\u5668\u7b49\u8bbe\u5907\uff0c\u5b9e\u73b0\u6570\u636e\u91c7\u96c6\u3001\u76d1\u63a7\u4ee5\u53ca\u8fdc\u7a0b\u63a7\u5236\u7b49\u529f\u80fd\u3002\u5176\u7a33\u5b9a\u53ef\u9760\u7684\u7279\u6027\u4f7f\u5176\u6210\u4e3a\u5de5\u4e1a\u9886\u57df\u901a\u8baf\u7684\u9996\u9009\u65b9\u6848\u3002<\/p>\n

  \u667a\u80fd\u697c\u5b87\u7cfb\u7edf<\/h3>\n

  \u5728\u667a\u80fd\u697c\u5b87\u7cfb\u7edf\u4e2d\uff0cRS485\u901a\u8baf\u534f\u8bae\u88ab\u7528\u4e8e\u8fde\u63a5\u5404\u79cd\u667a\u80fd\u5bb6\u5c45<\/a>\u8bbe\u5907\u3001\u7167\u660e\u63a7\u5236\u7cfb\u7edf\u3001\u7a7a\u8c03\u7cfb\u7edf\u7b49\uff0c\u5b9e\u73b0\u8fdc\u7a0b\u76d1\u63a7\u3001\u8282\u80fd\u7ba1\u7406\u4ee5\u53ca\u81ea\u52a8\u5316\u63a7\u5236\uff0c\u4e3a\u5efa\u7b51\u8282\u80fd\u3001\u8212\u9002\u548c\u5b89\u5168\u63d0\u4f9b\u4e86\u91cd\u8981\u652f\u6301\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  RS485\u901a\u8baf\u534f\u8bae\u4f5c\u4e3a\u4e00\u79cd\u7a33\u5b9a\u53ef\u9760\u7684\u901a\u8baf\u6807\u51c6\uff0c\u5176\u5dee\u5206\u4fe1\u53f7\u4f20\u8f93\u7279\u6027\u4f7f\u5176\u5728\u5de5\u4e1a\u63a7\u5236\u548c\u5efa\u7b51\u81ea\u52a8\u5316\u9886\u57df\u5f97\u5230\u4e86\u5e7f\u6cdb\u7684\u5e94\u7528\u3002<\/strong>\u4e86\u89e3\u548c\u638c\u63e1RS485\u901a\u8baf\u534f\u8bae\uff0c\u5bf9\u4e8e\u5de5\u7a0b\u5e08\u548c\u6280\u672f\u4eba\u5458\u6765\u8bf4\u81f3\u5173\u91cd\u8981\uff0c\u4e5f\u662f\u63a8\u52a8\u5de5\u4e1a\u667a\u80fd\u5316\u53d1\u5c55\u7684\u91cd\u8981\u6280\u672f\u57fa\u7840\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

RS485\u901a\u8baf\u534f\u8bae\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u4e32\u884c\u901a\u8baf\u534f\u8bae\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5de5\u4e1a\u63a7\u5236\u3001\u5efa\u7b51\u81ea\u52a8\u5316\u548c\u6570\u636e\u4f20\u8f93\u9886\u57df\u3002\u672c\u6587\u5c06\u4ecb\u7ecdRS485\u901a\u8baf\u534f\u8bae\u7684\u57fa\u672c\u539f\u7406\u3001\u7279\u70b9\u4ee5\u53ca\u5e94\u7528\u573a\u666f\uff0c\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u8fd9\u4e00<\/p>\n","protected":false},"author":1,"featured_media":64183,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[36],"tags":[61],"class_list":["post-77849","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-r"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/77849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/comments?post=77849"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/77849\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/64183"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=77849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=77849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=77849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}