method GetCurrentVisu ^{CODESYS Forge talk (Thread)}
method GetCurrentVisu
Last updated: 2010-07-12

Method count 42 ^{CODESYS Forge talk (Thread)}
Method count 42
Last updated: 2014-07-16

Post by dogulas on OPC UA C# client connecting to OPC UA CODESYS server ^{CODESYS Forge talk (Post)}
Noob alert! I’m just getting my feet wet with CODESYS. I have a “Hello World” project in the CODESYS IDE. I’m using the Win SoftPLC on the same computer. I’ve added a Communication Manager under the Application node. Under that is “OPC UA Server -> IEC Symbol Publishing 01”. I also added “OPC_UA_Symbols -> Information Model”. I’m not sure I need the second thing. I was grasping at straws. I also set up several dummy symbols in the IEC Symbol Publishing 01 node. In my C# application, I am trying to get an instance of EndpointDescription from CoreClientUtils.SelectEndpoint(“opc.tcp://localhost:1217/Gateway-1”, useSecurity: false, 15000). I wasn’t sure about the “Gateway-1”. I found that in the CODESYS IDE under the project -> Communication Settings. When I execute the previous method call in C#, I get: “BadSecureChannelClosed”. I have no idea what that means. Any pointers to documentation are welcome.
Last updated: 2024-08-16

Post by chris12345 on Calling OPC UA Methods from UaExpert ^{CODESYS Forge talk (Post)}
Hi, Is it possible to generate an .xml file with FBs and methods from Codesys? Or do I need a separate program to generate the .xml file? Or is there a otherway to use methods via opc ua from the own project?
Last updated: 2023-09-20

Post by chandrasekharrk on OPC UA Companion Specifications / Information model ^{CODESYS Forge talk (Post)}
Hello, Any work around for this problem. I am also facing the similar issue. wehn uploading Information model generated from OPC UA modeller. Regards Chandrasekhar RK
Last updated: 2023-10-02

Post by damian177 on OPC UA Client ^{CODESYS Forge talk (Post)}
When I try connect by other OPC UA Client everything is ok. Look like codesys have a problem with 'Tags' group. It possible add manually measurements form 'tag' group to codesys ?
Last updated: 2024-09-03

Not able to create an OPC UA certificate in my Beaglebone Black (linux Debian) on CODESYS 3.5 SP19 ^{CODESYS Forge talk (Thread)}
Not able to create an OPC UA certificate in my Beaglebone Black (linux Debian) on CODESYS 3.5 SP19
Last updated: 2023-05-28

Post by ryusoup on OPC UA Client certificate for datasource link ^{CODESYS Forge talk (Post)}
Hello, I'm looking for a way to set my client certificate, not one which self-signed cert generated with CODESYS, for OPC UA connection via datasource linking. Does anyone know how to archive that? BR,
Last updated: 2024-03-08

SoftPLC (CODESYS Control x86 RTE V3 x64) OPC UA binds only to 127.0.0.1 — Not binding to LAN IP ^{CODESYS Forge talk (Thread)}
SoftPLC (CODESYS Control x86 RTE V3 x64) OPC UA binds only to 127.0.0.1 — Not binding to LAN IP
Last updated: 2025-11-24

CoDeSys OPC / OPC Client showing bad data ^{CODESYS Forge talk (Thread)}
CoDeSys OPC / OPC Client showing bad data
Last updated: 2015-02-02

Post by food on Beaglebone Black OPC-UA Server ^{CODESYS Forge talk (Post)}
Man, this was a long time ago. I think the problem probably stemmed from not loading the certificates from the client and the server on the server and client respectively in the correct manner. I believe I ended up getting around it just by removing all security on the server. In the end we did not move forward with that architecture so I never had to actually fix it.
Last updated: 2024-04-10

Post by ulvis on IDE chrashes when importing OPC UA ECM model ^{CODESYS Forge talk (Post)}
Actually, importing the UA (core) version 1.0.0-2025-02-01 also does not work. IDE chrashes. I am able to import a version of UA (Core) model from 5.7.2020.
Last updated: 2025-08-14

Post by dnordenberg on BOOL variable in OPC UA and modbus simultaneously ^{CODESYS Forge talk (Post)}
How can I have an BOOL variable that is read/write in both modbus TCP server and from OPC UA at the same time? Variables with %MX.n %QX.n addressing which is used for BOOL/coils in modbus server is not allowed in OPC UA symbol list on Schneider M251 controllers. I have already asked on Schneiders forum but there are not a lot of codesys experts over there :( So OPC symbols can't have a address and the modbus TCP server needs a address. So how should I do it then? It seems like an impossible combination. Since I want read/write access from both ways I can't just simply make a second variable and assign it the value of another since it would be a one way assignment. I also tried using VAR_CONFIG which then makes the address syntax %Q or %M in my main variable list and that fools OPC UA Symbol Configuration to allow it and then I add the complete %MX.n address of it in the VAR_CONFIG list. This semi works, I can toggle the BOOL from modbus but the OPC UA symbol seems to be read only. It displays symbol status but nothing happens when I toogle it. I think I need another way to have the variables and symbols pointing to the same bits in memory... My plan B is to write a BOOL array compare FB that saves a history bit from previous cycle and if that does not match current status at next cycle for either the OPC symbol or the modbus variable then it copies the new status over to the other. Maybe ugly but it's like my last alternative. Kind regards David
Last updated: 2025-07-14

Post by anuj9326 on OPC-UA Client connection, Linux SL /Raspberry Pi ^{CODESYS Forge talk (Post)}
hello edwin i have did the same and i could connect the opc-ua server but i dont see anything in the resources tree, in the application i linked my variables to the symbol configuration but i dont see that in the uaexpert. if i use the same application with a non linux system i can get those variables values and see the complete tree structure. What could be the problem ?
Last updated: 2024-08-21

Post by anuj9326 on OPC-UA Client connection, Linux SL /Raspberry Pi ^{CODESYS Forge talk (Post)}
hello edwin i have did the same and i could connect the opc-ua server but i dont see anything in the resources tree, in the application i linked my variables to the symbol configuration but i dont see that in the uaexpert. if i use the same application with a non linux system i can get those variables values and see the complete tree structure. What could be the problem ?
Last updated: 2024-08-21

Post by dogulas on OPC UA C# client connecting to OPC UA CODESYS server ^{CODESYS Forge talk (Post)}
Ok, for the sake of completeness in case anyone else has this problem. I can tell you that what finally worked for me was to change the line: // create an ExtensionObject to wrap the value to be written ExtensionObject extensionObject = new ExtensionObject( new ExpandedNodeId("GVL_StructA", 5), structAData ); to: // create an ExtensionObject to wrap the value to be written ExtensionObject extensionObject = new ExtensionObject( new ExpandedNodeId("GVL_StructA|defaultbinary", 5), structAData ); I'm sure there are many other problems that could cause this very generic error, but this was my problem.
Last updated: 2024-12-30

Post by smartcoco on Opaque NodeId in the OPC UA server ^{CODESYS Forge talk (Post)}
This seems to be because when creating 'OPC UA' with 'Communication Manager', the 'IdentifierType' of 'NodeId' cannot be configured as' String 'type. This issue is not an isolated case. For this issue, CODESYS seems to have not provided guidance to users on how to proceed. We can provide feedback on this issue in the 'My Question' section of the 'CODESYS Store' to make CODESYS take it seriously.
Last updated: 2025-01-10

Post by gediminas on Datasource OPC UA client system failure ^{CODESYS Forge talk (Post)}
I am using CODESYS v3.5 SP20 Patch 3 / Control for BeagleboneBlack SL v4.13 and after some time the OPC UA Server crashes. However, Runtime still works without any issues. The events leading up to the OPC server crash are the most suspicious: 1) Mutex deadlock detected - owner thread died, and 2) Runtime received SIGABRT. And it seems very similar with this topic except used versions - issues should be fixed with previous SP's. I can't seem to find any information about these events. Need some pointers in the right direction on how I can fix this problem.
Last updated: 2024-10-25

Post by joel214 on OPC-UA / Unterschied Symbolkonfiguration, IEC-Symbolveröffentlichung und Informationsmodell ^{CODESYS Forge talk (Post)}
Hallo liebe Community, im Rahmen einer Studienarbeit gilt es ein OPC-UA-Informationsmodell in eine existierende CODESYS-Steuerung zu implementieren. Dabei sind wir auf die Frage gestoßen welcher Unterschied zwischen den folgenden Objekten besteht: - Symbolkonfiguration (veraltet?) - IEC-Symbolveröffentlichung - Veröffentlichung über zuvor erstelltes Informationsmodell In unserem Verständnis erfüllen alle Objekte die Gleiche Aufgabe nur mit unterschiedlicher Vorgehensweise und Darstellung im OPC-UA-Server. Während durch die Symbolkonfiguration die Variablen und Instanzen über lange und verschachtelte Pfade abgelegt werden, wird durch die IEC-Symbolveröffentlichung ein Ordner im Pfad der Objekte erstellt. Dort sind die Variablen und Instanzen anschließend zu finden. Bei der Verwendung von Informationsmodellen hingegen, werden die Instanzen direkt unter den Objekten abgelegt. Für welchen Anwendungsfall ist welche Vorgehensweise am besten? Vielen Dank vorab und viele Grüße Joel
Last updated: 2024-04-09

Post by msegon on OPC UA Client failed to connect ^{CODESYS Forge talk (Post)}
Hi everyone, I would appreciate your help with a problem I've been working on for a few days but haven't been able to resolve. I'm trying to read data from Tridium Niagara 4.15 OPC UA Server, but I get the error BadCertificateInvalid. As far as I understand, you need to add a CA certificate somewhere to establish a secure connection, but I don't know where. 2025-10-27T09:06:43.247Z, 0x0000008d, 4, 0, 0, * ERROR: OpcUa_Channel_BeginConnect: Cannot create secure channel without certificates! 2025-10-27T09:06:43.247Z, 0x00001090, 4, 0, 0, * ERROR: Datasource: Error Failed (268468242) in state Connecting I tried communicating without encryption, but it doesn't find the point. Has anyone managed to establish encrypted OPC UA communication?
Last updated: 2025-10-28

Post by alexgooi on Codesys OPC DA server requires more then 2 GB of ram ^{CODESYS Forge talk (Post)}
Last updated: 2024-01-25

Post by ben1 on Trying to connect Codesys OPC server to Ignition ^{CODESYS Forge talk (Post)}
The server doesn’t allow anonymous users. You need to configure a username/password for the connection.
Last updated: 2025-01-21

CODESYS connection zu UA Expert aufbauen ^{CODESYS Forge talk (Thread)}
CODESYS connection zu UA Expert aufbauen
Last updated: 2021-12-12

OPC Client not connect. ^{CODESYS Forge talk (Thread)}
OPC Client not connect.
Last updated: 2016-05-12

OPC Help needed please ^{CODESYS Forge talk (Thread)}
OPC Help needed please
Last updated: 2017-05-29

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