opc Questions
3
Solved
I have a .NET Generic Host with an IHostedService that receives events from an OPC-UA interface and that process them.
The problem is that if an unhandled exception occurs during the processing of...
Mouse asked 29/8, 2018 at 16:5
3
Solved
I have a panel Siemens TP1200 Comfort that I have configure as OPC AU server. This panel has some tags (nodes) from which I would like to get the value from a C# application.
I have read the exampl...
3
Solved
I'm trying to communicate with an OPC DA server and need to write in a tag which is in an array format. We can connect with a simulation server, read tags (int, real, array) and write tags (int, re...
Pentheas asked 25/11, 2021 at 23:1
5
Please explain what is the Difference Between OPC UA and OPC DA ?
In which condition which one should be used, and if any example can be provided for both OPC UA and OPC DA, it would be helpful
2
Solved
I am trying out the SampleApplication NetCoreConsoleClient from OPC UA Foundation GitHub page OPC-UA.net Standard
and I came to several problems along the way.
I wanted to use this library to simpl...
2
Solved
I am working on OPCUA in python. I am using freeopc. I have used their server_minimal & client_minimal example and it is running fine. I am having some issues understanding the code. As far as ...
2
Solved
What is the function of a historian in terms of OPC and PLC?
1
Solved
I am using a Dymola OPC server
DYMOLA HAS these many tags which can be controlled using SimControl.Run, SimControl.Stop ,etc
here i wrote it in MATLAB
hostInfo = opcserverinfo('localhost');
da = o...
6
Solved
2
Solved
I have noticed that all OPC tag Ids are prefixed with ns=2;s=.
Some examples of possible NodeId values would be:
ns=2;s=AcquisitionTimeRemaining
ns=2;s=Status
ns=2;s=Time
I am wondering what the ...
4
I am looking for some libraries and some examples to create an client OPC application in Java which could connect with opc server. Thanks in advance.
3
I want to create a VARIANT or _variant_t from a FILETIME in c/c++.
Basically, this is what I want:
FILETIME ft;
//Populate ft
VARIANT vFt;
VariantInit(&vFt);
vFt.vt = VT_FILETIME;
Now,...
2
I am developing a C# custom OPC Client, I started off writing in a console app for quickness, everything works perfectly as I want it to.
Then I decided to make a windows form application for a vi...
Scissure asked 15/5, 2015 at 12:0
1
Solved
I am using the OPC UA Foundation SDK to develop a small client. What would be the minimal C# code to:
Connect to a server
Browse the root node
Print the immediate children's BrowseNames
Quit?
I...
5
Solved
Does anyone know a C# OPC client sample application? I'm looking for a good opensource one to learn about the protocol. I would prefer it if it uses OPC foundation .net core apis.
4
Solved
I am developing an OPC client and need a free OPC server that can both simulate values and set values static. Is there such a server freely available?
Adactylous asked 22/2, 2012 at 12:55
5
Solved
I'm writing opc client, using .NET API from opc foundation.
In samples I only see, where item's names are hardcoded like:
items[0] = new Opc.Da.Item();
items[0].ItemName = "blahblahblah";
What ...
1
Solved
Our application uses COM and DCOM extensively, and so as part of that we need to ensure that the COM security permissions are correctly set up. I know that I can access these permissions under the ...
Trainbearer asked 19/10, 2012 at 12:44
2
Solved
In my company we have many distributed sites and each one uses a singular Scada system vendor (one uses Wincc, other place uses another...) and this systems works with almost the same kind of infor...
1
Solved
In general, if I've got a custom file of type W and want to use custom application/editor X to open/view it how do i set up Hg to call the application X when i want to edit/view the file?
Specific...
Probability asked 2/8, 2011 at 11:14
2
Solved
We are currently using a free trail version of KEP Server for our OPC to communicate with our PLC. We were wondering if anyone knows of any good open source OPC software.
Frangipani asked 6/4, 2011 at 18:35
3
I'm having a difficult time finding out if PHP can connect to an OPC server, and how. Our PHP is running on Unix with an Apache webserver. The OPC server is on Windows, that's the most I know about...
5
Solved
Where is a good place to start with making an application in .NET that communicates through OPC?
Goldarn asked 15/9, 2008 at 20:46
1
Solved
I'm working with a OPC Server control that stores data tags as variant types, described by System.Runtime.InteropServices.VarEnum. These types include the following, VT_BSTR (string), VT_I2 (short)...
Eagleeyed asked 30/10, 2009 at 11:26
1
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