{"id":1012998,"date":"2023-09-04T19:38:14","date_gmt":"2023-09-04T19:38:14","guid":{"rendered":"https:\/\/beta-new.inhand.com\/?p=6779"},"modified":"2026-06-04T00:44:01","modified_gmt":"2026-06-04T00:44:01","slug":"what-is-modbus","status":"publish","type":"post","link":"https:\/\/www.inhand.com\/fr\/support\/blogs\/what-is-modbus","title":{"rendered":"Qu&#039;est-ce que Modbus et comment fonctionne-t-il dans l&#039;industrie ?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"1012998\" class=\"elementor elementor-1012998\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f5deb9f e-con-full anli_box e-flex e-con e-parent\" data-id=\"f5deb9f\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-6c1a9e e-con-full anli_box_l e-flex e-con e-child\" data-id=\"6c1a9e\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-34437fe7 elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"34437fe7\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Qu&#039;est-ce que Modbus et comment fonctionne-t-il dans l&#039;industrie ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3775149e e-con-full e-flex e-con e-child\" data-id=\"3775149e\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-10a10b91 elementor-widget elementor-widget-heading\" data-id=\"10a10b91\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Blogs<\/h2>\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-6bac9b35 e-con-full e-flex e-con e-child\" data-id=\"6bac9b35\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-788fe74d elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"788fe74d\" data-element_type=\"widget\" id=\"maodian1\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Points cl\u00e9s \u00e0 retenir<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-257fbef5 elementor-widget elementor-widget-heading\" data-id=\"257fbef5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Le protocole est le langage utilis\u00e9 pour les technologies de communication, tout comme le langage de nos conversations quotidiennes. Si vous ne connaissez pas ce protocole, vous saurez seulement que c&#039;est \u00ab\u00a01\u00a0\u00bb, et si vous le connaissez, vous saurez que cela signifie \u00ab\u00a0gauche\u00a0\u00bb.<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c692e0c elementor-widget elementor-widget-text-editor\" data-id=\"c692e0c\" 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\t\t<p><strong>Qu&#039;est-ce qu&#039;un protocole ?<\/strong><\/p><p>Tout d&#039;abord, d\u00e9finissons ce qu&#039;est un protocole. Un protocole est le langage utilis\u00e9 en communication, tout comme le langage de nos conversations quotidiennes. Par exemple, nous \u00e9tablissons un accord appel\u00e9 protocole\u00a0: \u00ab\u00a01\u00a0\u00bb signifie gauche, \u00ab\u00a02\u00a0\u00bb signifie droite, et je vous donnerai un \u00ab\u00a01\u00a0\u00bb. Si vous ne connaissez pas ce protocole, vous saurez seulement que c&#039;est \u00ab\u00a01\u00a0\u00bb, et si vous le connaissez, vous saurez que cela signifie gauche.<\/p><p>Qu&#039;est-ce que le protocole Modbus\u00a0?<\/p><p>Apr\u00e8s avoir compris le concept de \u00ab\u00a0protocole\u00a0\u00bb, examinons ce qu&#039;est le protocole Modbus. Modbus est un protocole de communication s\u00e9rie, et plus pr\u00e9cis\u00e9ment un protocole de bus publi\u00e9 par la soci\u00e9t\u00e9 Modicon (d\u00e9sormais propri\u00e9t\u00e9 de Schneider Electric) en 1979 pour la communication avec ses automates programmables (PLC).<\/p><p>Il existe plusieurs versions du protocole Modbus pour le port s\u00e9rie et Ethernet, les plus courantes \u00e9tant Modbus TCP, Modbus RTU, Modbus ASCII et Modbus Plus.<\/p><p><strong>Protocole Modbus ASCII<\/strong><\/p><p>Le protocole Modbus ASCII est bas\u00e9 sur le protocole Modbus RTU, qui convertit les instructions en caract\u00e8res ASCII pour la transmission. Par exemple, le protocole Modbus RTU transmet \u00ab\u00a012\u00a0\u00bb, ce qui ne n\u00e9cessite qu&#039;un seul octet. Le protocole Modbus ASCII, quant \u00e0 lui, doit convertir \u00ab\u00a01\u00a0\u00bb en \u00ab\u00a031\u00a0\u00bb et \u00ab\u00a02\u00a0\u00bb en \u00ab\u00a032\u00a0\u00bb, ce qui requiert deux octets pour la transmission. Par cons\u00e9quent, Modbus ASCII est inefficace et son taux d&#039;utilisation est faible.<\/p><p><strong>Protocole Modbus Plus<\/strong><\/p><p>Le protocole Modbus Plus, commun\u00e9ment appel\u00e9 MB+, est un r\u00e9seau de bus de terrain \u00e0 haut d\u00e9bit, un r\u00e9seau de bus \u00e0 jeton typique et un syst\u00e8me de r\u00e9seau local, notamment pour les applications de contr\u00f4le industriel.<\/p><p><strong>Protocole Modbus TCP<\/strong><\/p><p>Le protocole Modbus TCP est utilis\u00e9 pour g\u00e9rer et contr\u00f4ler les \u00e9quipements d&#039;automatisation. Il permet l&#039;utilisation des messages Modbus dans les environnements \u00ab\u00a0Intranet\u00a0\u00bb et \u00ab\u00a0Internet\u00a0\u00bb via le protocole TCP\/IP. On peut le consid\u00e9rer comme un protocole Modbus RTU fonctionnant sur Ethernet.<\/p><p><strong>Protocole Modbus RTU<\/strong><\/p><p>Le protocole Modbus est un protocole de communication entre appareils, plus pr\u00e9cis\u00e9ment entre appareils utilisant le protocole Modbus RTU. Ceci est stipul\u00e9 dans le protocole Modbus, et le mode par d\u00e9faut est le protocole RTU. La structure d&#039;une trame comprend g\u00e9n\u00e9ralement une adresse, un code de fonction, des donn\u00e9es et un contr\u00f4le.<\/p><p><strong>Pourquoi le protocole Modbus est-il si populaire ?<\/strong><\/p><p>Jusqu&#039;\u00e0 pr\u00e9sent, il semble que l&#039;on ne comprenne pas pourquoi le protocole Modbus est si populaire. Essayons de le d\u00e9couvrir ensemble.<\/p><p>Le protocole Modbus est devenu la norme de facto en mati\u00e8re de communication dans le secteur industriel et constitue d\u00e9sormais un mode de connexion courant (une norme industrielle) entre les appareils \u00e9lectroniques industriels. Son succ\u00e8s repose sur trois facteurs cl\u00e9s\u00a0:<\/p><ul><li><p>Publi\u00e9 publiquement et sans restriction de droits d&#039;auteur.<\/p><\/li><li><p>Facile \u00e0 d\u00e9ployer et \u00e0 entretenir.<\/p><\/li><li><p>Il n&#039;existe pas beaucoup de restrictions concernant la modification des bits ou octets locaux.<\/p><\/li><\/ul>\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-4a0634a elementor-widget elementor-widget-image\" data-id=\"4a0634a\" 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 fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"200\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/modbus-1.png\" class=\"attachment-large size-large wp-image-960085\" alt=\"Sch\u00e9ma de communication industrielle illustrant le fonctionnement du protocole Modbus entre les appareils\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/modbus-1.png 1200w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/modbus-1-300x50.png 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/modbus-1-768x128.png 768w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/modbus-1-18x3.png 18w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/modbus-1-600x100.png 600w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\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-0fd9789 elementor-widget elementor-widget-text-editor\" data-id=\"0fd9789\" 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\t\t<p><strong>De mani\u00e8re g\u00e9n\u00e9rale, Modbus est un protocole de contr\u00f4le industriel qui pr\u00e9sente trois caract\u00e9ristiques\u00a0: gratuit\u00e9, facilit\u00e9 d\u2019utilisation et de modification, et qui est largement utilis\u00e9.\u00a0<\/strong><\/p><p>Gr\u00e2ce \u00e0 ces caract\u00e9ristiques, le protocole Modbus a r\u00e9sist\u00e9 \u00e0 l&#039;\u00e9preuve du temps et est toujours utilis\u00e9 dans de nombreux domaines, tels que les instruments et les compteurs, les appareils \u00e9lectriques intelligents haute et basse tension, les transmetteurs, les automates programmables, les interfaces homme-machine, les convertisseurs de fr\u00e9quence, les \u00e9quipements intelligents de terrain, etc.<\/p><p><strong>Comment le protocole Modbus est-il utilis\u00e9 dans l&#039;industrie ?<\/strong><\/p><p>Voici la nouvelle g\u00e9n\u00e9ration\u00a0<a href=\"https:\/\/inhandgo.com\/products\/ingateway502-industrial-cellular-gateway\" target=\"_self\">Passerelle p\u00e9riph\u00e9rique IoT<\/a>\u00a0Con\u00e7u pour l&#039;IoT industriel. Avec des protocoles industriels pr\u00e9-int\u00e9gr\u00e9s tels que Modbus TCP\/RTU et des clouds IoT comme MS Azure et AWS,\u00a0<a href=\"https:\/\/inhandgo.com\/products\/ingateway502-industrial-cellular-gateway\" target=\"_self\">Passerelle p\u00e9riph\u00e9rique IoT<\/a>\u00a0facilite la collecte de donn\u00e9es provenant de diff\u00e9rents appareils sur site, leur validation et leur t\u00e9l\u00e9chargement vers le cloud\u00a0; la configuration ne prend que quelques minutes et ne n\u00e9cessite aucune programmation.<\/p>\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-d06c00d elementor-widget elementor-widget-image\" data-id=\"d06c00d\" 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 decoding=\"async\" width=\"554\" height=\"220\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/ig502-modbus.png\" class=\"attachment-large size-large wp-image-960084\" alt=\"Sch\u00e9ma illustrant le protocole de communication Modbus connectant des appareils industriels tels que des capteurs et des contr\u00f4leurs.\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/ig502-modbus.png 554w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/ig502-modbus-300x119.png 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/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-af435c4 elementor-widget elementor-widget-text-editor\" data-id=\"af435c4\" 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\t\t<p>Le<a href=\"https:\/\/inhandgo.com\/products\/ingateway502-industrial-cellular-gateway\" target=\"_self\">\u00a0porte\u00a0<\/a>Il peut jouer le r\u00f4le de ma\u00eetre Modbus et lire les registres d&#039;un p\u00e9riph\u00e9rique esclave Modbus. Les signaux peuvent transiter par la liaison RS485 ou Ethernet.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1e87d53 e-con-full e-flex e-con e-child\" data-id=\"1e87d53\" data-element_type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15d3e6f0 elementor-widget elementor-widget-heading\" data-id=\"15d3e6f0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Produits associ\u00e9s<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2a74113 e-con-full e-flex e-con e-child\" data-id=\"2a74113\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2f8b19dc elementor-widget__width-inherit elementor-widget elementor-widget-shortcode\" data-id=\"2f8b19dc\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">    <div class=\"product-cards-outer-container-top\">\n        <div class=\"product-cards-carousel-wrapper\" id=\"carousel-6a2e2e5d3de83\">\n            <div class=\"product-cards-carousel\">\n\n<div class=\"product-cards-track\">\n        <a href=\"\/fr\/products\/edge-gateways\/ig502\/\" class=\"product-card-item\">\n                    <div class=\"product-card-image\">\n                <img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/02\/IG502.png\">\n            <\/div>\n                <h3 class=\"product-card-title\">IG502<\/h3>\n        <p class=\"product-card-desc\">Protocoles 4G\/Eth\/S\u00e9rie et E\/S\/80+<\/p>\n                    <p class=\"product-card-category\">Passerelle Edge<\/p>\n        \n                    <div class=\"product-card-button\">Apprendre encore plus <img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/08\/\u7bad\u5934\u7eff\u8272.svg\" alt=\"\" style=\"width:1em;height:1em;margin-left:0.5em;vertical-align:middle;\"><\/div>\n            <\/a>\n        <a href=\"\/fr\/products\/edge-gateways\/ig902\/\" class=\"product-card-item\">\n                    <div class=\"product-card-image\">\n                <img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/02\/IG902.png\">\n            <\/div>\n                <h3 class=\"product-card-title\">IG902<\/h3>\n        <p class=\"product-card-desc\">4G\/Ethereum\/Multi-s\u00e9ries et E\/S\/Plus de 80 protocoles<\/p>\n                    <p class=\"product-card-category\">Passerelle Edge<\/p>\n        \n                    <div class=\"product-card-button\">Apprendre encore plus <img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/08\/\u7bad\u5934\u7eff\u8272.svg\" alt=\"\" style=\"width:1em;height:1em;margin-left:0.5em;vertical-align:middle;\"><\/div>\n            <\/a>\n    <\/div>\n            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elementor-widget-heading\" data-id=\"69473ed\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">En savoir plus <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-108ac635 elementor-widget elementor-widget-shortcode\" data-id=\"108ac635\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">    <style>\n        \/* --- \u8fd9\u91cc\u7684\u53c2\u6570\u5168\u90e8\u4fdd\u7559\u4f60\u7684\u4fee\u6539 --- *\/\n        .vpro-wrapper {\n            width: 100%;\n            max-width: 25rem;\n            height: 38.5rem;\n            overflow-y: auto;\n            overflow-x: hidden;\n            \/* 1. 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      <\/div>\n        \n        <div class=\"vpro-bottom-spacer\"><\/div>\n    <\/div>\n    <\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>What is Modbus and How does It Work in the Industry? What is a protocol? 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 ag&#8230; Generally speaking, Modbus is a protocol for industrial control, which [&hellip;]<\/p>","protected":false},"author":1,"featured_media":960081,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[817],"tags":[],"case_tag":[],"class_list":["post-1012998","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Modbus Protocol Industrial Applications Explained<\/title>\n<meta name=\"description\" content=\"Explore Modbus TCP\/RTU protocols for industrial automation. 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