https://forge.codesys.com/forge/talk/Runtime/thread/95939b4e9e/2020-02-27T15:45:21.062000ZRecent posts to Read variable values with Ethernet / IP adapter2020-02-27T15:45:21.062000Z2020-02-27T15:45:21.062000Ztonteria24https://forge.codesys.com/u/tonteria24/https://forge.codesys.com4beaf8affae2505e86f6a56a48065ce87b5411b5

<div class="markdown_content"><p>Hello </p> <p>I'm writing some C code to read values from Codesys Raspberry Pi PLC using CIP Class 3 connected explicit messages. I can already connect to Ethernet/IP adapter and register session but I still can not read variable values. <br/> I'm using CIP Read Tag Service (0x4C) and passing a symbol (tag) with syntax "Application.PLC_PRG.varname".</p> <p>Ethernet/IP adapter responds with error status == 0x04 that CIP specs explains with: "The path segment identifier or the segment syntax was not understood by the processing node. Path processing shall stop when a path segment error is encountered"</p> <p>Are Class 3 explicit messages and service 0x4C implemented ? <br/> Am I using the correct syntax?</p> <p>I already marked for export the variables in the Symbol Configuration.</p> <p>Thanks in advanced !</p></div>