https://forge.codesys.com/forge/talk/CODESYS-V2/thread/652a59062f/2020-02-27T23:28:36.204000ZRecent posts to Multiple Modbus slaves using SysSockets library2020-02-27T23:28:36.204000Z2020-02-27T23:28:36.204000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.comd6a0b1b1a5db3cbdde5f07871c8ace4fc114cb86

<div class="markdown_content"><p><em>Originally created by:</em> Tomasz Wisniowski</p> <p>Hello Everyone,</p> <p>I am trying to communicate with multiple Modbus TCP slaves from one controller using SysSockets library. Currently I have been able to succesfully create two sockets. They are set up as unblocking, reuse address and reuse port. When trying to send/receive data, the first socket works fine and the second socket returns a -1. (Same subroutine is used to send/receive for both sockets so the code should be fine, Modbus TCP slaves have been swapped and the issue is not with the slaves) </p> <p>Is there anything else that I should be doing or not doing that I may be missing. Thanks a lot in advance for any help. </p> <p>Tom</p></div>