https://forge.codesys.com/forge/talk/CODESYS-V2/thread/0914220967/2023-09-11T10:04:53.197000ZRecent posts to Communication error (#0), logout performed,please check if plc is connected2023-09-11T10:04:53.197000Z2023-09-11T10:04:53.197000Zjohn-ronaldhttps://forge.codesys.com/u/john-ronald/https://forge.codesys.com29d275696e231d961f0f42ae9f0ed011c3ddc820

<div class="markdown_content"><p>Hi, I have the same problem. However I am using ethernet connection not USB.<br/> I can ping the PLC and also connect to it via Wago ethernet settings, but I cannot upload using the Codesys 2.3.</p> <p>My PLC is Wago 750-862.<br/> The detailed error is - <br/> "<br/> connect: Connection refused<br/> Write attempt from invalid socket.<br/> "</p> <p>Any help would be appreciated.</p></div>

2022-03-24T09:41:10.157000Z2022-03-24T09:41:10.157000Zjurrhttps://forge.codesys.com/u/jurr/https://forge.codesys.comb35b7cb6dbaccc04868d02993ea280c87995e00b

<div class="markdown_content"><p>Are you in simulation mode or is there a PLC connected to your laptop via USB? If the latter is true, go to Device Manager &gt; Ports and check at which COM port the PLC is connected. Once you've determined the COM port go to Codesys &gt; Online &gt; Communication parameters. You can change the COM port by double clicking it. Good luck! <br/> <a href="https://imgur.com/zqSbdBl" rel="nofollow">https://imgur.com/zqSbdBl</a></p></div>

2022-02-18T17:27:20.940000Z2022-02-18T17:27:20.940000Zarasu18996https://forge.codesys.com/u/arasu18996/https://forge.codesys.comc1de3949f7d658f94ab2355dff3a290b8c3d7a1c

<div class="markdown_content"><p>I was trouble in last two days with this codesys login problem...i have attached reference picture.. can anyone help me to how to fix this error</p></div>