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Questions tagged [opc]

OPC (Open Platform Communications) is the interoperability standard for the secure and reliable exchange of data in the industrial automation space.

OPC (Open Platform Communications) is the interoperability standard for the secure and reliable exchange of data in the industrial automation space.

From: http://www.opcfoundation.org/

Useful Links

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Is it possible to create a OPC server that connects to a device over telnet or http?

I have a device that can either be controlled with HTTP request or over a telnet connection. A client whats to be able to connect to this via a OPC server. Would it be possible to create a OPC server that talks directly to the device over HTTP or…
Jack burridge
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how to start an opc ua client for embedded STM32 board

Recently, I need some idea about how to start an OPC UA client programm on an embedded STM32, I do how to use the ansi C stack provided by OPC foundation
user3431136
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OPU UA Server Questions

I have been looking at the OPC UA Specification parts, however they do not give you a list of classes and function and tell you how they work. Is there something like that? Also the server, the 1st thing it does is creates an Object right? one of…
Brandon Boone
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How to connect remote OPC Server using opcdaauto.dll using C#?

DLL used : opcdaauto.dll from OPC Foundation OPCServer ObjOPCServer; OPCGroups ObjOPCGroups; OPCGroup ObjOPCGroup; ObjOPCServer = new OPCServer(); string _serverName = "Kepware.KEPServerEX.V5"; //In…
Mahesh Datta
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OPC with Python 3.3

I'd like to read the tags from my OPC server (kepware) with Python 3.3 I have found the openopc project at the sourceforge, but it seems it doesnt work with Python 3.3 Do I have other options here?
Istvanb
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DCOM session moniker

The code is in my OPC Client, and I want to activate a DCOM OPC Server. My purpose is to activate the OPC Server in session 1, but it works out still in session 0, i mean the OPC Server process is still run in session 0. Because the OPC Server…
Nature
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Write a value with OPC UA Java (OPC Foundation)

I am trying to connect to a remote environment using the OPC UA java stack from the OPC Foundation. Reading values is working correct, for that I am using the following code: NodeId nodeId= NodeId.get(IdType.String, 2,…
user3083205
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OPC Client is starting new process when OPC server is added to OPC Client

I have created opc server using grabox opc library. I have to connect, read and write the item value to the OPC Client. OPC client is Niagara Ax software. OPC client can discover the opc server and can connect to it and display Server's item. But…
user3048644
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How to read data from the cache in c++

I am using a toolkit to develop client and server , which contains "WriteItems" function. Initially server creates some items and client reads these items. Then client make some changes on this items.The "WriteItems" method will be called every time…
Sika Shrestha
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MATLAB - GUI and OPC server

I want to design a graphical user interface in MATLAB that can read data continuously using the MATLAB's object linking and embedding for process control (OPC) toolbox. How can I implement this? I have designed the graphical user interface, but I'm…
user2987586
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access right with OPC Client run as a windows service

I write a OPC client process in MFC, and everything is OK when I run it directly in VS2010. But when I install it as a windows services, problem comes. I still can connect to OPC Server, but after connected I check the status of the OPCServer with…
Nature
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Cannot receive OPC A&E events remotely via DCOM between WinXP SP3 VMs

I can't receive A&E events remotely, via the DCOM connection. I am familiar with DCOM trickery and configured OPC DA many times, but this is not the case. For instance, I've composed the proof-of-concept configuration consisting of two virtual…
Minor Threat
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Cross platform OPC UA communication for mobile platforms

I was looking into options of OPC UA client for ios and Android. I found out that there are some solutions available natively in android and iOS for Android : http://www.prosysopc.com/blog/2012/02/24/otso/15/#! for iOS :…
Rahul Raj
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Allow service to interact with desktop - Windows Service to communicate with OPC Server

I have an application talking to an OPC server. When I run it as a Windows Service it cannot open the connection to the OPC server. When I am activating the Option 'Allow service to interact with desktop' it works! But how can I make this as a…
Matthias
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Forcing an OPC Client to read the OPC Servers cache

I'm messing around with the OPC Foundations .NET library looking at building an OPC Client. The Client is communicating with a Kepware OPC Server (KEPServerExV5). The tags that my OPC Client is reading use the in built Modbus TCP/IP driver that is…
Peadar Doyle
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