https://forge.codesys.com/forge/talk/Runtime/thread/2a20b40d4c/2020-02-27T15:54:41.246000ZRecent posts to Modbus TCP Read/Write2020-02-27T15:54:41.246000Z2020-02-27T15:54:41.246000Zjessejamescoxhttps://forge.codesys.com/u/jessejamescox/https://forge.codesys.com3efac7b1fff391fa15d8ed80e6dd588c0a969b06

<div class="markdown_content"><p>May be possible to use Network Variable instead of MB protocol. CoDeSys doesnt handle RW variables in MB registers any longer.</p></div>

2020-02-27T15:54:40.356000Z2020-02-27T15:54:40.356000Zpoixhttps://forge.codesys.com/u/poix/https://forge.codesys.com63e94760590fa788664daea7c31ec28339817860

<div class="markdown_content"><p>Thank's for your replay, but I have to connect to a Wago PLC.</p> <p>Gianni</p></div>

2020-02-27T15:54:39.460000Z2020-02-27T15:54:39.460000ZTiakTiakhttps://forge.codesys.com/u/tiaktiak/https://forge.codesys.comefc79500204507398ce794442227d06e742c96bb

<div class="markdown_content"><p>Hi Poix.</p> <p>I had the same problem that I needed to read and write to the same variable from an HMI using ModbusTCP.<br/> But unfortunately, it seems that this is not possible anymore in Codesys 3.5.<br/> In my solution, i changed the driver to OPC UA, but this might nog be possible for you.</p> <p>Jesper</p></div>

2020-02-27T15:54:36.981000Z2020-02-27T15:54:36.981000Zpoixhttps://forge.codesys.com/u/poix/https://forge.codesys.com440464109cfdfb31d2769927e8eac06c59371234

<div class="markdown_content"><p>I use the function FC23 but i can't use the same variable in read and write</p> <p>Gianni</p></div>

2020-02-27T15:54:35.991000Z2020-02-27T15:54:35.991000Zpoixhttps://forge.codesys.com/u/poix/https://forge.codesys.comf1c198c358d1e49b66f5af0c036bf2d499c0af35

<div class="markdown_content"><p>I have a Wago PLC and would like to connect with modbus TCP.<br/> It is possible to create READ/WRITE variable?</p> <p>Gianni</p></div>