Recent posts to network varaibles with UDP. PLC not receiving the messageshttps://forge.codesys.com/forge/talk/CODESYS-V2/thread/ea3e128722/2020-02-27T20:40:50.737000ZRecent posts to network varaibles with UDP. PLC not receiving the messagesnetwork varaibles with UDP. PLC not receiving the messages2020-02-27T20:40:50.737000Z2020-02-27T20:40:50.737000Zefra-mxhttps://forge.codesys.com/u/efra-mx/https://forge.codesys.com2a3fcecabdb098a1174066a6f96c5d2721b0abdf<div class="markdown_content"><p>I have develop a library on C++ to control and monitor the PLC(Festo's CPX). I works very good (when it has proper connection).</p>
<p>Nevertheless I am experiencing a issue: sometimes the PLC does receive the messages (PC<-PLC), it is totally random, but once it starts working, it never fails while it is energized. <br/>
The work around is a power cycle, but it is annoying.</p>
<p>I have logged the UDP messages and I ca see that the messages are being broadcasted by the PC, but the PLC doesnt receive them. The PC->PLC communication always works</p>
<p>I got the idea from this project:<br/>
<a class="" href="http://plclogger.sourceforge.net/index.php/en/" rel="nofollow">http://plclogger.sourceforge.net/index.php/en/</a></p>
<p>Has anyone experienced any issue like this?<br/>
Am i missing something?<br/>
How can I identify if this is HW issue or not? I happens with all the CPXs. Could it be a codesys RTE issue?</p>
<p>Thanks for your help</p>
<p>/Efrain</p></div>