https://forge.codesys.com/forge/talk/CODESYS-V2/thread/d04107ce73/2020-02-27T18:53:59.022000ZRecent posts to Library for sending and receiving CAN Open SDO Messages.2020-02-27T18:53:59.022000Z2020-02-27T18:53:59.022000Zspfeifhttps://forge.codesys.com/u/spfeif/https://forge.codesys.comc61316cdb2b8ecc8105cef685603433864c8b209

<div class="markdown_content"><p>Yes that seems correct to me. I have a library that I assume is written by my PLC vendor that allows reading/writing segmented SDO's. I personally haven't tried them yet. I would be happy to share them with you if they work in your system but I would also assume that the library would be hardware independent. There are two separate function blocks SDO_READ_NET.lib and SDO_WRITE_NET.lib. One function block in each library. Now the only thing I would guess is if you already have a node configured via the 3S CANOpen Stack in the PLC configuration I am not confident that this block will send or receive anything because the CANOpen stack may interrupt it first? I don't have any documentation on the library. Let me know if you want to try it.</p></div>

2020-02-27T18:53:55.730000Z2020-02-27T18:53:55.730000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com1e90627653e3064f2efbe0ec2addf4f6a5c5e7c7

<div class="markdown_content"><p><em>Originally created by:</em> jking222</p> <p>I've done a fair amount of looking. Codesys doesn't seem to have a library that easily supports sending and receiving of SDO messages greater than 4 bytes. </p> <p>Is this true, or is there a library I'm unaware of?</p></div>