https://forge.codesys.com/forge/talk/Engineering/thread/47e3271a6e/2020-02-27T14:41:42.231000ZRecent posts to Multiple connections to CoDeSysOPC-Server2020-02-27T14:41:42.231000Z2020-02-27T14:41:42.231000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.comf4dd1f49d1d0aef572069e7a98f2fb247d3e2592

<div class="markdown_content"><p>Hi,<br/> which version do you have installed on the PI?<br/> (CODESYS runtime 3.5.x.x)</p> <p>BR<br/> Edwin</p></div>

2020-02-27T14:41:41.711000Z2020-02-27T14:41:41.711000Zedmorrisseyhttps://forge.codesys.com/u/edmorrissey/https://forge.codesys.com7ee6f5913e4cc817323433d79de5d685df5befad

<div class="markdown_content"><p>Hi Edwin</p> <p>Thanks for your response. I have searched the etc folder an it does not contain the config file or any files from CODESYS.<br/> Could you please tell me where exactly I can locate this file?<br/> /etc/CODESYSControl_User.cfg</p> <p>Regards<br/> Ed</p></div>

2020-02-27T14:41:41.197000Z2020-02-27T14:41:41.197000Ze.kislovhttps://forge.codesys.com/u/e-kislov/https://forge.codesys.com89e87c268bb508ca649906421b1cdd430c114905

<div class="markdown_content"><p>Thank you for explanations.</p></div>

2020-02-27T14:41:39.740000Z2020-02-27T14:41:39.740000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com54e0fa21f7a9b82a62d3f29bf538dde40af66b87

<div class="markdown_content"><p>Hi,</p> <p>BUFFERSIZE is the overall amount of memory to be used by all channels<br/> MAXCHANNELS defines the number of channels that may be handled <br/>  concurrently. <br/> <br/> Since each channel needs separate send and receive channels<br/> the available communication buffer is BUFFERSIZE / (2*MAXCHANNELS)<br/> - Webvisu<br/> - OPC UA<br/> - OPC DA<br/> - CODESYS<br/> each occupy one channel...</p> <p>BR<br/> Edwin</p></div>

2020-02-27T14:41:39.243000Z2020-02-27T14:41:39.243000Ze.kislovhttps://forge.codesys.com/u/e-kislov/https://forge.codesys.com737c84339f6aab99e43ecb2785ae5b9599eaee29

<div class="markdown_content"><p>Edwin, can you explain "Buffersize=1600000"? What the buffer, which dimension of value (bytes?).<br/> "Channel" represents only CODESYS OPC connection to PLC? Or any connection like IDE connection, web-visu connection, etc.</p></div>

2020-02-27T14:41:38.700000Z2020-02-27T14:41:38.700000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com255a6943e6cd3e0dea7bf42003cf5e6665d607dc

<div class="markdown_content"><p>Hi,</p> <p>sounds like the max Client is exeeded ( Default is 4)<br/> If i understand it, you do not get values from the CODESYS PI to your OPC DA server connected Client, right?</p> <p>You could extend the Client by adding to the </p> <p><strong>/etc/CODESYSControl_User.cfg</strong></p> <p><strong><span><span>[CmpChannelServer]</span></span>Buffersize=1600000MaxChannels=8</strong></p> <p>do not forget to restart the Pi after this change.</p> <p>BR<br/> Edwin</p></div>

2020-02-27T14:41:37.198000Z2020-02-27T14:41:37.198000Zedmorrisseyhttps://forge.codesys.com/u/edmorrissey/https://forge.codesys.com59aaec436d2f170af367d0ebe2a2e167d0fa4291

<div class="markdown_content"><p>We are currently trying to connect the OSIsoft PI System to a CoDeSysOPC-Server using the PI OPC DA interface. <br/> There is also an Stange ECS application connected to this CoDeSysOPC-Server.<br/> When the Stange ECS application is connected to the CoDeSysOPC-Server, we are unable to connect with the PI system.<br/> Has anyone experienced something like this or would have any suggestions for me?</p></div>