{"id":12323,"date":"2023-09-05T03:38:14","date_gmt":"2023-09-04T19:38:14","guid":{"rendered":"https:\/\/www.inhand.com\/?p=12323"},"modified":"2024-08-06T02:16:30","modified_gmt":"2024-08-06T02:16:30","slug":"what-is-modbus","status":"publish","type":"post","link":"https:\/\/www.inhand.com\/en\/support\/blogs\/what-is-modbus\/","title":{"rendered":"What is Modbus and How does It Work in the Industry?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"12323\" class=\"elementor elementor-12323\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-302c3ff4 e-flex e-con-boxed e-con e-parent\" data-id=\"302c3ff4\" data-element_type=\"container\" data-settings=\"{&quot;container_type&quot;:&quot;flex&quot;,&quot;content_width&quot;:&quot;boxed&quot;}\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-6bf0ec05 e-con-full e-flex e-con e-child\" data-id=\"6bf0ec05\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;full&quot;,&quot;container_type&quot;:&quot;flex&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-15f15aa5 elementor-widget elementor-widget-heading\" data-id=\"15f15aa5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.17.0 - 01-11-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h1 class=\"elementor-heading-title elementor-size-default\">What is Modbus and How does it work in the Industry<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6cffbfdb e-con-full e-flex e-con e-child\" data-id=\"6cffbfdb\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;full&quot;,&quot;container_type&quot;:&quot;flex&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-61f94e5d elementor-widget elementor-widget-text-editor\" data-id=\"61f94e5d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.17.0 - 01-11-2023 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p><strong>What is a protocol?<\/strong><\/p><p>First, let\u2019s know what a protocol is. The protocol is the language used for communication technology, just like the language of our daily conversation. For example, we make an agreement called protocols, \u201c1\u201d is left, \u201c2\u201d is right, and I will give you a \u201c1\u201d. If you don\u2019t learn this protocol, you only know that it is \u201c1\u201d, and if you have learned that, you will know that it means left.<\/p><p>What is Modbus protocol?<\/p><p>After comprehending the concept of \u201cprotocol\u201d, let\u2019s look at what Modbus protocol is. Modbus is a serial communication protocol, and it is a bus protocol published by Modicon Company (now owned by Schneider Electric) in 1979 for communication with its programmable logic controller (PLC).<\/p><p>Several versions of the Modbus protocol exist for the serial port and Ethernet and the most common are Modbus TCP, Modbus RTU, Modbus ASCII and Modbus Plus.<\/p><p><strong>Modbus ASCII protocol<\/strong><\/p><p>Modbus ASCII protocol is based on Modbus RTU protocol, which converts instructions into ASCII characters for transmission. For example, Modbus RTU protocol needs to transmit \u201c12\u201d, which only needs one byte. Modbus ASCII protocol needs to convert \u201c1\u201d to \u201c31\u201d and \u201c2\u201d to \u201c32\u201d, and then it takes two bytes to transmit. Therefore, Modbus ASCII is inefficient and has a low utilization rate.<\/p><p><strong>Modbus Plus protocol<\/strong><\/p><p>Modbus Plus protocol, commonly known as MB+, is a high-speed Fieldbus network, a typical token bus network and a local area network system, especially for industrial control applications.<\/p><p><strong>Modbus TCP protocol<\/strong><\/p><p>Modbus TCP protocol is used to manage and control automation equipment. It covers the use of Modbus messages in \u201cIntranet\u201d and \u201cInternet\u201d environments using TCP\/IP protocol. You can see it as Modbus RTU protocol running on Ethernet.<\/p><p><strong>Modbus RTU protocol<\/strong><\/p><p>Modbus protocol is a protocol running between devices, or we should say there must be Modbus RTU protocol between devices! This is stipulated in Modbus protocol, and the default mode must be RTU protocol. Frame structure generally consists of address, function code, data and check.<\/p><p><strong>Why is Modbus protocol all the rage?<\/strong><\/p><p>Up to this point, it doesn\u2019t seem to see why the Modbus protocol can be so popular. Let\u2019s find out together.<\/p><p>Modbus has become the industry standard of communication protocol in the industrial field (De facto), and now it is a common connection mode (an industrial standard) between industrial electronic devices. In addition, there are the three primary keys to its success:<\/p><ul><li><p>Publicly published and without copyright requirements.<\/p><\/li><li><p>Easy to deploy and maintain.<\/p><\/li><li><p>There are not many restrictions on changing local bits or bytes.<\/p><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0025283 elementor-widget elementor-widget-image\" data-id=\"0025283\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.17.0 - 01-11-2023 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"171\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/modbus-1-1024x171.png\" class=\"attachment-large size-large wp-image-17505\" alt=\"\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/modbus-1-1024x171.png 1024w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/modbus-1-300x50.png 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/modbus-1-768x128.png 768w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/modbus-1-18x3.png 18w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/modbus-1.png 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bd0467d e-con-full e-flex e-con e-child\" data-id=\"bd0467d\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;full&quot;,&quot;container_type&quot;:&quot;flex&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dc2f502 elementor-widget elementor-widget-text-editor\" data-id=\"dc2f502\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>Generally speaking, Modbus is a protocol for industrial control, which has three characteristics: free use, easy to use and easy to change, and has been widely used.\u00a0<\/strong><\/p><p>Because of the above characteristics, Modbus protocol has stood the test of time and is still being used in a wide range of fields, such as instruments and meters, intelligent high and low voltage electrical appliances, transmitters, programmable controllers, man-machine interfaces, frequency converters, field intelligent equipment and so on.<\/p><p><strong>How is the Modbus used in the industry?<\/strong><\/p><p>There comes the new-generation\u00a0<a href=\"https:\/\/inhandgo.com\/products\/ingateway502-industrial-cellular-gateway\" target=\"_self\">IoT edge gateway<\/a>\u00a0designed for industrial IoT. With pre-integrated industrial protocols such as Modbus TCP\/RTU and IoT clouds like MS Azure and AWS, the\u00a0<a href=\"https:\/\/inhandgo.com\/products\/ingateway502-industrial-cellular-gateway\" target=\"_self\">IoT edge gateway<\/a>\u00a0makes it easy to collect data from different onsite devices, validate data and upload them to the cloud \u2014 and the configuration takes only a few minutes without any programming.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-67c42e8 elementor-widget elementor-widget-image\" data-id=\"67c42e8\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"554\" height=\"220\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/ig502-modbus.png\" class=\"attachment-large size-large wp-image-17506\" alt=\"\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/ig502-modbus.png 554w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/ig502-modbus-300x119.png 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/09\/ig502-modbus-18x7.png 18w\" sizes=\"(max-width: 554px) 100vw, 554px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fbc0833 elementor-widget elementor-widget-text-editor\" data-id=\"fbc0833\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The<a href=\"https:\/\/inhandgo.com\/products\/ingateway502-industrial-cellular-gateway\" target=\"_self\">\u00a0gateway\u00a0<\/a>can play the role of a Modbus Master and reads registers from a Modbus Slave device. The signals can be on both the RS485 link and also the Ethernet link.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4dc21528 e-flex e-con-boxed e-con e-child\" data-id=\"4dc21528\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;container_type&quot;:&quot;flex&quot;,&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5c7efff0 e-con-full e-flex e-con e-child\" data-id=\"5c7efff0\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;full&quot;,&quot;container_type&quot;:&quot;flex&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4ac4d1fd e-con-full e-flex e-con e-child\" data-id=\"4ac4d1fd\" data-element_type=\"container\" 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data-widget_type=\"ucaddon_uc_card_post_carousel.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\n<!-- start Post Carousel Lite -->\n\t\t<link id='font-awesome-css' href='https:\/\/www.inhand.com\/wp-content\/plugins\/unlimited-elements-for-elementor-premium\/assets_libraries\/font-awesome6\/fontawesome-all.min.css' type='text\/css' rel='stylesheet' >\n\t\t<link id='font-awesome-4-shim-css' href='https:\/\/www.inhand.com\/wp-content\/plugins\/unlimited-elements-for-elementor-premium\/assets_libraries\/font-awesome6\/fontawesome-v4-shims.min.css' type='text\/css' rel='stylesheet' >\n\t\t<link id='owl-carousel-css' href='https:\/\/www.inhand.com\/wp-content\/plugins\/unlimited-elements-for-elementor-premium\/assets_libraries\/owl-carousel-new\/assets\/owl.carousel.css' type='text\/css' rel='stylesheet' >\n\n<style>\/* widget: Post Carousel Lite *\/\n\n#uc_uc_card_post_carousel_elementor_7ef50058 *{\n  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Designed to prevent downtime,...<\/div>    <div class=\"ue_post_btn_holder\"><a class=\"uc_more_btn\"  href=\"https:\/\/www.inhand.com\/en\/support\/blogs\/new-5g-router-cr602-helps-coffee-shops-improve-connectivity-and-business-internet-reliability\/\">Learn more &nbsp;&nbsp;&nbsp;\u2192<\/a><\/div>  <\/div>\n<\/div>\n<div id=\"uc_uc_card_post_carousel_elementor_7ef50058_item2\" class=\"uc_image_carousel_container_holder ue_post_carousel_item ue-Blogs\">\n  <div class=\"uc_image_carousel_placeholder\">\n    <a href=\"https:\/\/www.inhand.com\/en\/support\/blogs\/clawdbot-edge-deployment-guide\/\"><div calss=\"uc_image_carousel_bg\" style=\"background-image:url(https:\/\/www.inhand.com\/wp-content\/uploads\/OpenClaw-banner-768x563.png); background-size:cover; background-position:center; height:200px;\"><\/div><\/a>\n  <\/div>\n\n  <div class=\"uc_image_carousel_content\" >\n                <a href=\"https:\/\/www.inhand.com\/en\/support\/blogs\/clawdbot-edge-deployment-guide\/\" style=\"text-decoration:none;\"><div class=\"uc_post_title\" style=\"text-decoration:none;\">Goodbye Mac mini \u201cAlways-On\u201d \u2014 A Budget AI Edge Computer Keeps OpenClaw Running 24\/7<\/div><\/a>    <div class=\"ue_post_intro\">Deploy an always-on AI agent on an InHand edge computer with Linux: install Clawdbot, schedule inspections...<\/div>    <div class=\"ue_post_btn_holder\"><a class=\"uc_more_btn\"  href=\"https:\/\/www.inhand.com\/en\/support\/blogs\/clawdbot-edge-deployment-guide\/\">Learn more &nbsp;&nbsp;&nbsp;\u2192<\/a><\/div>  <\/div>\n<\/div>\n<div id=\"uc_uc_card_post_carousel_elementor_7ef50058_item3\" class=\"uc_image_carousel_container_holder ue_post_carousel_item ue-Blogs\">\n  <div class=\"uc_image_carousel_placeholder\">\n    <a href=\"https:\/\/www.inhand.com\/en\/support\/blogs\/making-automated-production-lines-truly-controllable-and-visible\/\"><div calss=\"uc_image_carousel_bg\" style=\"background-image:url(https:\/\/www.inhand.com\/wp-content\/uploads\/Making-Automated-Production-Lines-Truly-Controllable-and-Visible-cover-768x563.jpg); background-size:cover; background-position:center; height:200px;\"><\/div><\/a>\n  <\/div>\n\n  <div class=\"uc_image_carousel_content\" >\n                <a href=\"https:\/\/www.inhand.com\/en\/support\/blogs\/making-automated-production-lines-truly-controllable-and-visible\/\" style=\"text-decoration:none;\"><div class=\"uc_post_title\" style=\"text-decoration:none;\">Making Automated Production Lines Truly Controllable and Visible<\/div><\/a>    <div class=\"ue_post_intro\">As automation deepens, production lines rely more than ever on stable network connectivity. 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background-size:cover; background-position:center; height:200px;\"><\/div><\/a>\n  <\/div>\n\n  <div class=\"uc_image_carousel_content\" >\n                <a href=\"https:\/\/www.inhand.com\/en\/support\/blogs\/traffic-shaping-for-network-management\/\" style=\"text-decoration:none;\"><div class=\"uc_post_title\" style=\"text-decoration:none;\">Traffic Shaping: The Invisible Hand of Network Management<\/div><\/a>    <div class=\"ue_post_intro\">Discover how traffic shaping improves network performance by prioritizing critical data. 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