Can I Fetch data from classic OPC Server?

[tejasklodha]

Dear Sir,

I want to fetch data from classic OPC Server. Can it possible by TitaniumAS.Opc.Client?

Thanks,

[alexey-kachalov]

Hi. If you mean "classic" is an OPC DA Server of version 1.0, 2.05A, 3.0, so the library supports that. You can simply try it.

[tejasklodha]

Dear Sir,

My PLC is OPC DA Server but I did work for OPC UA but not detail in OPC DA. I started with console app but I am confuse in first step that what is "Matrikon.OPC.Simulation." Uri url = UrlBuilder.Build("Matrikon.OPC.Simulation.1");

Is it Server CLSID or ProgID?

and when I run my console app and throw exception.

throw new OpcClientException(
                    "Unable to initialize OPC DA client. It should run under MTA apartment state due to CoInitializeSecurity call. " +
                    "See http://www.pinvoke.net/default.aspx/ole32/CoInitializeSecurity.html for details.", ex);

Kindly find my code in attachment? If its possible then can you give simple example that fetch live variable from OPC DA server ?

Thanks, Program.txt

[alexey-kachalov]

You can see an example here (https://github.com/titanium-as/TitaniumAS.Opc.Client/issues/4#issuecomment-242775557).

In order to make the example working, you have to install MatrikonOPC Explorer (https://www.matrikonopc.com/downloads/176/index.aspx) firstly. It provides OPC server for simulation.

Also check that you start an application with MTA (https://github.com/titanium-as/TitaniumAS.Opc.Client#bootstrapping-the-library).

[tejasklodha]

Dear Sir,

Download and install MatrikonOPC Explorer also use example https://github.com/titanium-as/TitaniumAS.Opc.Client/issues/4#issuecomment-242775557

but getting error as below in code - class Com

 throw new ExternalException("CoCreateInstanceEx: " + GetSystemMessage(error), error);

An unhandled exception of type 'System.Runtime.InteropServices.ExternalException' occurred in TitaniumAS.Opc.Client.dll
Additional information: CoCreateInstanceEx: Class not registered

[tejasklodha]

Dear Sir,

    private const string ServerUri = "Graybox.Simulator.1"; //ProgId for matrikon simulation server
    private const string SubscribeItemId = "time.random"; //itemId for subscribed opc item

After I chnage OPC Server and subscription ID as above then I got below error.

On code (Class - OpcServer.cs):

 DoComCall(ComObject,
                "IOpcServer::AdGroup", () => ComObject.AddGroup(name, active, (int) requestedUpdateRate.TotalMilliseconds, clientHandle,
                    pTimeBias, pPercentDeadband, lcid, out _serverHandle, out pRevisedUpdateRate, ref interfaceGuid,
                    out opcDaGroup), name, active, requestedUpdateRate.TotalMilliseconds, clientHandle,
                pTimeBias, pPercentDeadband, lcid);

Exception :

An unhandled exception of type 'System.ArgumentException' occurred in TitaniumAS.Opc.Client.dll
Additional information: Value does not fall within the expected range.

[alexey-kachalov]

Hm. Check please that Opc Core Components (https://opcfoundation.org/developer-tools/developer-kits-classic/core-components) installed on your system first. It is possible you have not installed OPCEnum service.

I suggest you to make https://github.com/titanium-as/TitaniumAS.Opc.Client/issues/4#issuecomment-242775557 working before you try to use another OPC DA server.

[tejasklodha]

Dear Sir,

Already installed https://opcfoundation.org/developer-tools/developer-kits-classic/core-components

1. But now again I Create new project and make one console application Install nugets - TitaniumAS.Opc.Client

2. then copy code form https://github.com/titanium-as/TitaniumAS.Opc.Client/issues/4#issuecomment-242775557 and past to my consol app

3. Change 3 lines of code as below

Before

private const string ServerUri = "Matrikon.OPC.Simulation.1"; //ProgId for matrikon simulation server
private const string SubscribeItemId = "Random.Int4"; //itemId for subscribed opc item
private const string GroupName = "TestGroup"; //group name for make subscription

after

        private const string ServerUri = "Graybox.Simulator.1"; //ProgId for matrikon simulation server
        private const string SubscribeItemId = "numeric.sin.int8"; //itemId for subscribed opc item
        private const string GroupName = "Group002"; //group name for make subscription

4. Run code Exception throw on below code:

OpcDaGroup @group = server.AddGroup(GroupName, groupState);

Exception:

An unhandled exception of type 'System.ArgumentException' occurred in TitaniumAS.Opc.Client.dll
Additional information: Value does not fall within the expected range.

5 find code Program.txt

Kindly help

Thanks,

[alexey-kachalov]

Does the library work with Matrikon.OPC.Simulation.1 (not with Graybox) at the moment?

[tejasklodha]

Dear Sir,

I am unable find Matrikon.OPC.Simulation.1 on MatrikonOPC Explorer so I used Graybox and also test Kepware.KEPServerEX.V6 but still getting same error.

Thanks

[alexey-kachalov]

Matrikon.OPC.Simulation.1 exists by default along with MatrikonOPC Explorer when you have installed the last one. Just try to use the string "Matrikon.OPC.Simulation.1".

[tejasklodha]

Dear Sir,

When I replace below code and run application then below exception generated

       private const string ServerUri = "Matrikon.OPC.Simulation.1"; //ProgId for matrikon simulation server
        private const string SubscribeItemId = "Random.Int4"; //itemId for subscribed opc item
        private const string GroupName = "TestGroup"; //group name for make subscription

exception generated on code : server.Connect();

An unhandled exception of type 'System.Runtime.InteropServices.ExternalException' occurred in TitaniumAS.Opc.Client.dll
Additional information: CoCreateInstanceEx: Class not registered

Thanks,

[alexey-kachalov]

Could you send us the program? I'm unable to try it at the moment because of absence near PC. Maybe someone try to reproduce your problem.

[tejasklodha]

Dear Sir,

Find attached code fro your reference. OpcTest 19_05.zip

[tejasklodha]

Dear Sir,

Done by using https://github.com/titanium-as/TitaniumAS.Opc.Client/blob/master/README.md Its really nice and Easy to use....

Thanks,

[alexey-kachalov]

Thanks :)