https://forge.codesys.com/forge/talk/Engineering/thread/1e899c48dc/2020-02-27T13:48:00.665000ZRecent posts to Serial communication library and Modbus Rtu library2020-02-27T13:48:00.665000Z2020-02-27T13:48:00.665000ZKimhttps://forge.codesys.com/u/kim/https://forge.codesys.com97a92fe613905fcd9f03390e9a365faeefd47340

<div class="markdown_content"><p>Further information to Paul/Codesys:</p> <p>Paul is running Codesys on a Beijer Electronics TxB SoftControl master, runtime v3.5.7.10.<br/> I am able to reproduce the error in my office. I get Modbus going, all is fine, then I open a completely different port using the COM.Open block. This causes the Modbus to fail after a certain time, always around 55s.</p> <p>However, if I try using a PC with Codesys RTE v3.5.9.40 or a Beijer Electronics X2 Control, runtime v3.5.9.50, then everything works fine.<br/> So... the error seems to be related to either Codesys SP7 or the TxB SoftControl itself.</p> <p>Request to Codesys:<br/> Please check JIRA logs for anything related to this between SP7 Patch 1 and SP9 Patch 4 and Beijer Electronics will continue investigating how ports are handled by the old TxB master.</p> <p>Kim Hansen<br/> Beijer Electronics Products AB</p></div>

2020-02-27T13:48:00.592000Z2020-02-27T13:48:00.592000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com0c104ae5d346791cf8cbdb97b9f1aafe89be4abb

<div class="markdown_content"><p><em>Originally created by:</em> ph0010421</p> <p>Hello<br/> Rt 3.5.7.10<br/> I can use the Modbus RTU library without problem to talk to Modbus slaves.<br/> I have now added the serial communication library to use another serial port (not modbus).<br/> When I open this port, the modbus dies after 1 minute (error 162, CRC error)<br/> If I don't open the new port then the modbus comms is happy for 'ever'.<br/> Any suggestions?<br/> Paul</p></div>