https://forge.codesys.com/forge/talk/Runtime/thread/0bc496f0b7/2020-02-27T15:48:13.276000ZRecent posts to Raspberry Pi B+ modbus RTU2020-02-27T15:48:13.276000Z2020-02-27T15:48:13.276000ZTorsten Wagnerhttps://forge.codesys.com/u/torsten-wagner/https://forge.codesys.com5ed459d513ac83b872a2d4326cb606c4b463dfe3

<div class="markdown_content"><p>HY Edwin,</p> <p>I found`ve my mistake.<br/> I thougt there was an Bus error but the Bus was still working i just used the wrong parameters.</p> <p>thanks for your help</p> <p>Greetings <br/> Torsten</p></div>

2020-02-27T15:48:10.973000Z2020-02-27T15:48:10.973000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.comf50346c1db1c61af09503a51bc3dce0908fe1ba3

<div class="markdown_content"><p>Hi,</p> <p>this sounds for me like your connected slave does not support the configured function codes.</p> <p>BR<br/> Edwin</p></div>

2020-02-27T15:48:10.022000Z2020-02-27T15:48:10.022000ZTorsten Wagnerhttps://forge.codesys.com/u/torsten-wagner/https://forge.codesys.com725b4f93e83b139158df523dfeee34bb344e816f

<div class="markdown_content"><p>Hi ,</p> <p>I tried with an other Terminal and now i get the Error </p> <p>"ILLEGAL_FUNCTION"</p> <p>On the Modbus Slave</p> <p>BR <br/> Torsten</p></div>

2020-02-27T15:48:07.797000Z2020-02-27T15:48:07.797000ZTorsten Wagnerhttps://forge.codesys.com/u/torsten-wagner/https://forge.codesys.com99bc4b082bf77deaa34cbfef072df01c461c2a20

<div class="markdown_content"><p>Hi Edwin</p> <p>I tried it with an Control Win<br/> but there is no Comunication on the Port</p> <p>also not at the start of the application.</p> <p>BR<br/> Torsten</p></div>

2020-02-27T15:48:06.915000Z2020-02-27T15:48:06.915000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com9fea8f3a5bd1ba27c79a1e7c5becab71a17c25d8

<div class="markdown_content"><p>Hi Thorsten,</p> <p>RESPONSE_TIMOUT means:<br/> Either the answer from the slave occure to late or the answer does not come to the iec code...some how<br/> Could you check by a sniffing tool if the response is on the serial line?<br/> Another check might be:<br/> Using Control Win for a quicktest (if your pc have a Serial Interface or a usb-to-serial interface)</p> <p>BR<br/> Edwin</p></div>

2020-02-27T15:48:06.107000Z2020-02-27T15:48:06.107000ZTorsten Wagnerhttps://forge.codesys.com/u/torsten-wagner/https://forge.codesys.comfc9a9354dea9f688ee35d61f943516a4f029eb28

<div class="markdown_content"><p>Hy, <br/> here is the <br/> Screenshot</p> <p>BG<br/> Torsten</p> <p><img alt="IMG: Pic.JPG" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=1062"/></p></div>

2020-02-27T15:48:03.880000Z2020-02-27T15:48:03.880000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com5a70a173ce0faba6d63a31c9df32732f35f71ca6

<div class="markdown_content"><p>Hi,</p> <p>could you give a screenshot of the non working project of the device tree when you are online?<br/> Please add the Slavename of the modbus slave to the watchwindow.<br/> You should see the error there.</p> <p>BR<br/> Edwin</p></div>

2020-02-27T15:48:03.067000Z2020-02-27T15:48:03.067000ZTorsten Wagnerhttps://forge.codesys.com/u/torsten-wagner/https://forge.codesys.com7f8ed3666f285952063e383abaa3aebd01c51077

<div class="markdown_content"><p>Hi Edwin,</p> <p>I<code>ve Checkt my Serial Comunication with the Raspberry and it works. I</code>ve used the Serial Projekt out of these Forum.</p> <p>Write Works and Read also.<br/> But in my other brojekt the Modbus doesnt work I get an working Master but the Slave has an Error.<br/> What could that be.</p> <p>BR<br/> Torsten</p></div>

2020-02-27T15:48:02.241000Z2020-02-27T15:48:02.241000ZLedrunnerhttps://forge.codesys.com/u/ledrunner/https://forge.codesys.comab60922854d4047b6d5d4af7c820721e6ed7e4dd

<div class="markdown_content"><p>Solved, was space in string Linux.Devicefile=/dev/ttyUSB. Master now is run.<br/> But I have other problem. Everything is work (slave device responded), registers is wrote and read. But the Modbus slave now give the message Bus Failure. What could be this?</p></div>

2020-02-27T15:47:59.856000Z2020-02-27T15:47:59.856000ZLedrunnerhttps://forge.codesys.com/u/ledrunner/https://forge.codesys.coma26bd628a731d3b8d375b58af0ac4f55d852ef0b

<div class="markdown_content"><p>Hello everyone. I have a problem. I have USB - 485 converter with cp21xx (I see them in sudo dmesg). I can to send packets from raspberry to another computer. Is it possible to try to make a raspberry master using a standard CODESYS bus configurator. Will it work? Now I have bus failure. <br/> 1. Raspi B+<br/> 2. Codesys 3.5 SP6<br/> 3. Raspberry control 2.1<br/> 4. USB-485 cp21xx Silicon Labs</p> <p>PS: I add in sudo nano /etc/CODESYSControl.cfg</p> <p><span>[SysCom]</span><br/> Linux.Devicefile=/dev/ttyUSB<br/> portnum := COM.SysCom.SYS_COMPORT1;</p></div>