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Questions tagged [opc-ua]

The Open Platform Communications (OPC) Unified Architecture (UA), released in 2008, is a platform independent service-oriented architecture that integrates all the functionality of the individual OPC Classic specifications into one extensible framework. Use this tag on questions that concern Open Platform Communications Unified Architecture, in contrast to legacy OLE-based OPC.

The Open Platform Communications (OPC) Unified Architecture (UA), released in 2008, is a platform independent service-oriented architecture that integrates all the functionality of the individual OPC Classic specifications into one extensible framework.

is an interoperability standard that enables the secure and reliable exchange of industrial automation data while remaining cross-platform and vendor neutral. The specification, currently version 1.03, is developed and maintained by the OPC Foundation with the guidance of individual software developers, industry vendors, and end-users. It defines the interface between Clients and Servers, including access to real-time data, monitoring of alarms and events, historical data access, and data modeling.

From: https://projects.eclipse.org/projects/iot.milo

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862 questions
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How are OPC UA namespace used?

I'm very new to the OPC UA and would appreciate your help with stuff that seems to be basic but I can't grasp it in full. I'm exploring a publicly available OPC UA server at opc.tcp://opcuaserver.com:48010. Here's the tree of nodes it exposes: I'm…
Max Ivanov
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Is there any open source OPC UA Server where i can add and configure nodes of FileType

I am developing a OPC UA Client Application which reads a file stored on a OPC UA Server. For testing Purpose i need a OPC UA Server simulator where i can add nodes of FileType and configure those nodes. Currently i am using Prosys OPC UA Server…
Harshith R
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issue Reading DT (date and time) from opc ua siemens server C#

I'm trying to read the date and time (#DT) from Opc ua Server (Siemens) using opc ua DLLs of unifiedautomation. But i get wrong value: siemens S7 1500 opc ua client DT#2008-10-25-08:12:34.567 --> 17.09.1142…
asdin
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Only username and password (withour certificate and private key)

I am trying to access SINUMERIK (Siemens) OPC UA. The server is only username and password protected (without certificate and private key). I have tried to connect with the following: client =…
Aburub
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How to set the proper data type when writing to an OPC-UA node in Milo?

I am an OPC-UA newbie integrating a non-OPC-UA system to an OPC-UA server using the Milo stack. Part of this includes writing values to Nodes in the OPC-UA server. One of my problems is that values from the other system comes in the form of a Java…
Nenovrak
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Is there a way to create an array of custom datatype in OPC-UA?

I am able to create a custom datatype using python-opcua examples. I want to create an array for the custom data type. Example: I want to create : ARRAY[0..1] OF type_def_Struct I tried by creating a list, like we do in python and define custom…
ankit sakhuja
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OPC Client server: Error establishing a connection: BadNotConnected

I am not able to connect opc client. As you can see session's properties not intializing properly and also ApplicationName even UaApplication object(m_application) have all values. I am new in OPC, So please guide me on this.
cSharma
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Create Custom complex Datatypes in OPC UA (UA-.NETStandard)

I am new to the OPC UA world. Can anybody guide my how to create a custom complex type in c# using OPCFoundation/UA-.NETStandard.In my CreateAddressSpace method I want to create a node 'ABC' with custom datatype like Person and Person will have…
Yasir
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Apache Camel Milo Client Timeout

I'm trying to connect to a OPC UA server with camel. I downloaded the camel java template via mvn:archetype. This is what my route looks like: public class MyRouteBuilder extends RouteBuilder { public void configure() { …
Necrophades
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OPC-UA open62541 sdk Add Variable nodes dynamically after run the server

Reading the documentation and examples of the OPC-UA foundation and OPC-UA open62541 sdk, the variables nodes are always added before the statement to start run the server. Is it possible to add them after the server has been started? If I change…
Lucas Santos
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How to send the data using Eclipse Milo OPC Server

I want to send data generated by my application to OPC UA client using OPC UA Server. I have gone through Eclipse Milo Project which is great resource for the same. But I don't know how to integrate it in our Application.The Application produces…
Sam Brooks
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opc ua client to server

I would like to know if I can send data from an OPC UA Client to Server. I have a Windows 10 PC with OPC UA Server set up and some Raspberry Pi as Clients. I already programmed Python code to send data from Server to Client. Now, I want to send data…
EOFF
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OPC-UA Function of "UA_ReadRequest_deleteMembers" Error Problem

Hello Everyone i have one question I Using OPC-UA for client, I have some problem This is Problem code UA_ReadRequest requestPos; UA_ReadRequest_init(&requestPos); UA_ReadValueId idPos; UA_ReadValueId_init(&idPos); idPos.attributeId =…
JeaHwan Chung
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Should/Can you run Node-OPCUA Server running on Azure?

I deployed my OPC Server (made with Node.js node-opcua) on Azure as a WebApp and its running. I also got the opc.tcp address (eg. opc.tcp://somenumbers:4840/UA/INDUSTRIE4.0) . When I try to connect to it with UaExpert I get this error: Discovery…
Suisse
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Eclipse Milo - ClosedChannelException when using SecurityPolicy

I am connecting from an Eclipse Milo client to an Eclipse Milo server. Everything works fine but as soon as I try connecting with any SecurityPolicy except "None" I get the following error: 17:28:18.365 [main] DEBUG…
Magnus Lutz
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