Limitation on OPC UA Variable 100+ variables on raspberry pi ^{CODESYS Forge talk (Thread)}
Limitation on OPC UA Variable 100+ variables on raspberry pi
Last updated: 2026-01-22

Fail communication between CODESYS and Fuxa SCADA via OPC UA ^{CODESYS Forge talk (Thread)}
Fail communication between CODESYS and Fuxa SCADA via OPC UA
Last updated: 2026-03-12

Post by macman on Codesys 3.5 OPC UA Client to Kepware OPC UA Server ^{CODESYS Forge talk (Post)}
Hi, I have problem with connecting Wago PLC WAGO 750-8212/0025-0002 configured as OPC UA client to Kepware OPC UA Server. I am using Codesys 3.5.19.70. What I did so far. To the Codesys project I added object Data Source Manager and configured connection OPC UA like below: pic 1 Then I can browse the OPC server tags in “Variables” tab after prior trust on the server side of the client certificate created in the “Communication” tab: pic 2 Additionally second certificate has been created in Codesys for runtime process in “Security screen” as well as the server certificate was approved here: pic 3 But when I compiled project, downloaded it to PLC and go to RUN I can’t read selected in “Variables” tab, OPC Server tags. I am getting such error (ID: 7001): pic 4 All two PLC certificates has been trusted in OPC server (Kepware) side: pic 5 and Kepware server configuration look like this: pic 6 I can easily connect using third party OPC UA client UaExpert to Kepware server without problem. In attachment I added also log from Kepware OPC UA server. pic # - this specifies the number of a concrete graphic from one of the collective in attachment
Last updated: 2025-04-02

Post by kuegerls on OpC UA server on Raspberry Pi MC SL - Certificate Issue ^{CODESYS Forge talk (Post)}
Hello, I have set up an OPC UA server following several guides, including this one: https://revolutionpi.com/documentation/tutorials/opc-ua-codesys-nodered/. The license for the runtime is installed on the device. However, I am unable to create a certificate for the OPC UA server in the security screen. I always get the error message: "The certificate has not been created by the device." Does anyone have an idea what might be causing this issue? Any help would be greatly appreciated! Thanks in advance! Best regards, Stefan
Last updated: 2025-04-02

Post by anoori on Setting up Raspberry pi as an Opc ua Server with UaExpert as Client ^{CODESYS Forge talk (Post)}
I am trying to set up my Raspberry Pi as an OPC UA server and use UaExpert on my Pc as the OPC UA client.However, Im encountering some certificate-related errors in UaExpert: 1.Unable to get local issuer certificate. 2. Unable to get certificate CRL. 3. Unable to verify the first certificate.
Last updated: 2024-09-11

Post by anoori on setting up Raspberry pi as an opc ua Server with UaExpert as Client ^{CODESYS Forge talk (Post)}
I am trying to set up my Raspberry Pi as an OPC UA server and use UaExpert on my Pc as the OPC UA client.However, Im encountering some certificate-related errors in UaExpert: 1.Unable to get local issuer certificate. 2. Unable to get certificate CRL. 3. Unable to verify the first certificate.
Last updated: 2024-09-11

OPC-UA Server, Symbol Set: Raise an error: Object reference not set to an instance of an object. ^{CODESYS Forge talk (Thread)}
OPC-UA Server, Symbol Set: Raise an error: Object reference not set to an instance of an object.
Last updated: 2024-08-08

Post by thn-power on Opaque NodeId in the OPC UA server ^{CODESYS Forge talk (Post)}
I'm wondering the same. Using the old symbol configurator opc ua server gave the node id using a string. Must be a way to specify this at build time?
Last updated: 2024-12-16

Post by dgdamt on Beaglebone Black OPC-UA Server ^{CODESYS Forge talk (Post)}
Hello, In my case all was ok on the BeagleBone side (OPC server) but wrong on the client side (was OK with UA Expert who manage properly its own certificates. I finnaly removed all security settings
Last updated: 2024-04-16

Post by damian177 on Problem with downloading OPC UA tags by Data Source Manager ^{CODESYS Forge talk (Post)}
Hi, In Codesys V3.5 SP20, using Data Source Manager I am trying to connect to the OPC UA server and receive tags from it. The connection is ok, but the Codesys have a problem with downloading Tags group. The window (downloadingTags.jpg in attachement) never stop. After waiting for a while, I disconnect the connection and only the Server group remains downloaded, with OPC UA server diagnostic data (and this is read in Codesys). Of course, I tried connected via another OPC UA client : UaExpert , and everything works as it should, all tags are downloaded (Uaexpert.jpg screen). Has anyone on the forum encountered the OPC UA client configuration in Codesys? Is it possible to manually request the appropriate tags from the OPC server for reading in Codesys?
Last updated: 2024-09-03

Post by askjong on Update variables when OPC UA Client updates. Error ID: 268468277 BadAttributeIdInvalid ^{CODESYS Forge talk (Post)}
Hi, I'm connecting to a OPC UA Server using the Data Soruce Manager OPC UA Client. This works well until the OPC UA Server updates and the OPC UA list doesn't match up when i did last clicked the "Update variables" to add variables. All the variables are still the exists and none are removed from the server, but more are added during the engineering process. The error message i get in CODESYS is "Error in OPC UA call BadAttributeIdInvalid, Error ID: 268468277". The issues is fixed when i press the "Update variables" button and just press ok without adding or removing any variables in the list. Is there a way to either automatically update the browsepath if it fails or on startup, or to trigger it by code?
Last updated: 2024-01-08

Post by benemenn on OPC UA Method - How to wait for result? ^{CODESYS Forge talk (Post)}
so from what i've learned. Codesys OPCUA Server can only provide OPC UA Methods, when they are created in an XML Model beforehand. So you have to create the XML Model with OPC UA Methods. Then load that model into codesys and create the IEC Blocks. This is automated Code and will create all the variables and Methods from your XML Model. Then they will be displayed on discovery with an OPC UA Client. As far as I understood. There is no way for Methods to be shown in OPC UA when not using an external XML Informationmodel. Codesys can not yet create the informationmodel on itself. Regards
Last updated: 2025-04-02

Post by benemenn on OPC UA Method - How to wait for result? ^{CODESYS Forge talk (Post)}
so from what i've learned. Codesys OPCUA Server can only provide OPC UA Methods, when they are created in an XML Model beforehand. So you have to create the XML Model with OPC UA Methods. Then load that model into codesys and create the IEC Blocks. This is automated Code and will create all the variables and Methods from your XML Model. Then they will be displayed on discovery with an OPC UA Client. As far as I understood. There is no way for Methods to be shown in OPC UA when not using an external XML Informationmodel. Codesys can not yet create the informationmodel on itself. Regards
Last updated: 2025-04-02

Post by climblinne on OPC UA Method - How to wait for result? ^{CODESYS Forge talk (Post)}
Hello, I am already able to run an OPC UA method in Codesys. Now my question, how can I interact with other tasks (e.g. read an SDO from EtherCAT and return it by the function)? The OPC UA method seems to be called only once (I tried to return BOOL or UINT values). Up to now I only found to do a while loop to wait for the result of the other task. Is there a better way to do it? Is this the way OPC UA functions should be used (for "not too long" function calls) or should I use another mechanism (method: Start, event: Finish, method: getResult)? Regards
Last updated: 2025-01-13

Post by dat422 on OPC UA Method - How to wait for result? ^{CODESYS Forge talk (Post)}
Hi, I am also interested to know on how to use the Codesys OPCUA Client to call methods from e.g. a python opcua server.
Last updated: 2025-03-28

Post by benemenn on OPC UA Method - How to wait for result? ^{CODESYS Forge talk (Post)}
Hi, just being curious. Are you providing opc ua methods or calling them? Either way, how did you implement this?
Last updated: 2025-03-26

Post by ken-san-sg on Function Block Method call from OPC UA Client ^{CODESYS Forge talk (Post)}
Hello, Is it possible to call mathod which is implemented in Function Block POU from OPC UA client?
Last updated: 2025-07-18

Trying to connect Codesys OPC server to Ignition ^{CODESYS Forge talk (Thread)}
Trying to connect Codesys OPC server to Ignition
Last updated: 2025-01-22

Interface to Codesys OPC server using C# ^{CODESYS Forge talk (Thread)}
Interface to Codesys OPC server using C#
Last updated: 2015-02-09

OPC-Server an Beckhoff-SPS und an IndraDrive ^{CODESYS Forge talk (Thread)}
OPC-Server an Beckhoff-SPS und an IndraDrive
Last updated: 2006-04-03

OPC Server in Verbindung mit Siemens S7-1500 ^{CODESYS Forge talk (Thread)}
OPC Server in Verbindung mit Siemens S7-1500
Last updated: 2019-11-27

Codesys 2 OPC server C++ exapmles ^{CODESYS Forge talk (Thread)}
Codesys 2 OPC server C++ exapmles
Last updated: 2017-04-14

Codesys OPC-Server mit KEB C5 und LabView ^{CODESYS Forge talk (Thread)}
Codesys OPC-Server mit KEB C5 und LabView
Last updated: 2010-08-26

OPC Server läuft, wie mit Codesys zugreifen ^{CODESYS Forge talk (Thread)}
OPC Server läuft, wie mit Codesys zugreifen
Last updated: 2012-02-24

OPC Server Error message in WINSL x64 ^{CODESYS Forge talk (Thread)}
OPC Server Error message in WINSL x64
Last updated: 2023-01-11

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