<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- modbusslave.qdoc --> <title>Modbus Slave example | Qt Serial Bus 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtserialbus-index.html">Qt Serial Bus</a></td><td >Modbus Slave example</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtserialbus-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#running-the-example">Running the Example</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">Modbus Slave example</h1> <span class="subtitle"></span> <!-- $$$modbus/slave-brief --> <p>The example implements a Modbus slave application.</p> <!-- @@@modbus/slave --> <!-- $$$modbus/slave-description --> <div class="descr"> <a name="details"></a> <p>The example acts as Modbus slave. It receives standard Modbus requests, adjusts its internal states based on the request and responds with the appropriate reply. As such a slave is the equivalent of a Modbus server.</p> <p class="centerAlign"><img src="images/modbusserver.png" alt="" /></p><a name="running-the-example"></a> <h2 id="running-the-example">Running the Example</h2> <p>To run the example from Qt Creator, open the <b>Welcome</b> mode and select the example from <b>Examples</b>. For more information, visit Building and Running an Example.</p> <p>This example must be used in conjunction with the <a href="qtserialbus-modbus-master-example.html">Modbus Master example</a>. This example should be started and put into the listen state before the Modbus master example is started. Subsequent interactions between the two examples use the Modbus protocol.</p> <p>Files:</p> <ul> <li><a href="qtserialbus-modbus-slave-main-cpp.html">modbus/slave/main.cpp</a></li> <li><a href="qtserialbus-modbus-slave-mainwindow-cpp.html">modbus/slave/mainwindow.cpp</a></li> <li><a href="qtserialbus-modbus-slave-mainwindow-h.html">modbus/slave/mainwindow.h</a></li> <li><a href="qtserialbus-modbus-slave-mainwindow-ui.html">modbus/slave/mainwindow.ui</a></li> <li><a href="qtserialbus-modbus-slave-settingsdialog-cpp.html">modbus/slave/settingsdialog.cpp</a></li> <li><a href="qtserialbus-modbus-slave-settingsdialog-h.html">modbus/slave/settingsdialog.h</a></li> <li><a href="qtserialbus-modbus-slave-settingsdialog-ui.html">modbus/slave/settingsdialog.ui</a></li> <li><a href="qtserialbus-modbus-slave-slave-pro.html">modbus/slave/slave.pro</a></li> <li><a href="qtserialbus-modbus-slave-slave-qrc.html">modbus/slave/slave.qrc</a></li> </ul> <p>Images:</p> <ul> <li><a href="images/used-in-examples/modbus/slave/images/application-exit.png">modbus/slave/images/application-exit.png</a></li> <li><a href="images/used-in-examples/modbus/slave/images/connect.png">modbus/slave/images/connect.png</a></li> <li><a href="images/used-in-examples/modbus/slave/images/disconnect.png">modbus/slave/images/disconnect.png</a></li> <li><a href="images/used-in-examples/modbus/slave/images/settings.png">modbus/slave/images/settings.png</a></li> </ul> </div> <!-- @@@modbus/slave --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>