https://forge.codesys.com/forge/talk/Engineering/thread/79fca8fa9d/2022-08-18T08:26:11.263000ZRecent posts to ETCMasterStack DynamicConfig2022-08-18T08:26:11.263000Z2022-08-18T08:26:11.263000Zstephan89https://forge.codesys.com/u/stephan89/https://forge.codesys.com24c2288dd16197ec92afee06a041b08683a89187

<div class="markdown_content"><p>Hello,</p> <p>I try to run an EtherCAT-Bus without configuring the Slaves in the device tree. This is described on the following page of the CODESYS Online Help: <a href="https://help.codesys.com/webapp/C4D5b3NXlIZndtqdRGsMJRgeHFw%2Ffld-DynamicConfig;product=EtherCATStack;version=3.5.17.0." rel="nofollow">https://help.codesys.com/webapp/C4D5b3NXlIZndtqdRGsMJRgeHFw%2Ffld-DynamicConfig;product=EtherCATStack;version=3.5.17.0.</a></p> <p>The bus starts up successful and everything seems to work corrent. The problem is that in the ETCSlave instances generated by:</p> <div class="codehilite"><pre><span></span><span class="err">{implicit on}</span> <span class="err">// important: initialize the fb instances</span> <span class="err">pSlave^.__vfinit();</span> <span class="err">pSlave^.FB_Init(FALSE, FALSE); // call the constructor</span> <span class="err">{implicit off}</span> </pre></div> <p>there is no data. That means InputData and OutputData properties have no pointers and are always 0. The same problem exists if I access the slave Instance via the EthercatMaster (ECM0):<br/> ECM0.Master^.FirstSlave. Running through the linked list via ECM0.Master^.FirstSlave^.NextInstance works and I get a list of pointers in the correct count of slaves but I cannot access other properties.</p> <p>Can anybody help?</p> <p>CODESYS Version 3.5.17.0. CODESYS Control Win (32-bit). </p> <p>Any help is appreciated.</p></div>