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connect the c++ to quickopc

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TONY CHIAM
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04 May 2017 13:36 - 04 May 2017 14:11 #5136 by TONY CHIAM

Replied by TONY CHIAM on topic connect the c++ to quickopc

Hi, i already change back to libid and try to connect to the matrikonopc server for omron plc. When i put the server class and item id into my coding, it comes out some error and i dont know how to solve it. Sorry, i am the newbie for opc and c++. Thank.

*******************************************************************

#include "stdafx.h"
#include <atlsafe.h>
#include <comutil.h>
#include <Windows.h>
 
#import "libid:BED7F4EA-1A96-11D2-8F08-00A0C9A6186D"    // mscorlib
using namespace mscorlib;
 
// OpcLabs.BaseLib
#import "libid:ecf2e77d-3a90-4fb8-b0e2-f529f0cae9c9" \
	rename("value", "Value")
using namespace OpcLabs_BaseLib;
 
// OpcLabs.EasyOpcClassic
#import "libid:1F165598-2F77-41C8-A9F9-EAF00C943F9F" \
	rename("machineName", "MachineName") \
	rename("serverClass", "ServerClass")
using namespace OpcLabs_EasyOpcClassic;
 
int _tmain(int argc, _TCHAR* argv[])
{
    // Initialize the COM library. Note: If you choose STA, you will be responsible for pumping messages.
    CoInitializeEx(NULL, COINIT_MULTITHREADED);
 
    // Instatiate the EasyOPC-DA client object
    _EasyDAClientPtr ClientPtr(__uuidof(EasyDAClient));
 
    _DAReadItemArgumentsPtr ReadItemArguments1Ptr(_uuidof(DAReadItemArguments));
    ReadItemArguments1Ptr->ServerDescriptor->ServerClass = L"Matrikon.OPC.OMRON.1";
	ReadItemArguments1Ptr->ItemDescriptor->ItemId = L"first/PLC1/#OfflineMode";
 
 
    CComSafeArray<VARIANT> ArgumentsArray(1);
    ArgumentsArray.SetAt(0, _variant_t((IDispatch*)ReadItemArguments1Ptr));
 
    LPSAFEARRAY pArgumentsArray = ArgumentsArray.Detach();
    CComSafeArray<VARIANT> ResultArray;
	ResultArray.Attach(ClientPtr->ReadMultipleItems(&pArgumentsArray));
    ArgumentsArray.Attach(pArgumentsArray);
 
    for (int i = ResultArray.GetLowerBound(0); i <= ResultArray.GetUpperBound(0); i++)
    {
        _DAVtqResultPtr DAVtqResultPtr(ResultArray[i]);
 
		_ExceptionPtr ExceptionPtr(DAVtqResultPtr->Exception);
		if (ExceptionPtr != NULL)
		{
	        _variant_t exceptionAsString(ExceptionPtr->ToString);
	        _tprintf(_T("results(%d).Exception.ToString(): %s\n"), i, exceptionAsString.bstrVal);
			continue;
		}
 
        _DAVtqPtr DAVtqPtr(DAVtqResultPtr->Vtq);
        _variant_t vtqAsString(DAVtqPtr->ToString);
        _tprintf(_T("results(%d).Vtq.ToString(): %s\n"), i, vtqAsString.bstrVal);
    }
 
    // Release all interface pointers BEFORE calling CoUninitialize()
    ResultArray.Destroy();
    ClientPtr = NULL;
 
    CoUninitialize();
 
    TCHAR line[80];
    _putts(_T("Press Enter to continue..."));
    _fgetts(line, sizeof(line), stdin);
    return 0;
}

*****************************************************************************************************
error C2039: 'ItemId' : is not a member of 'OpcLabs_EasyOpcClassic::_DAItemDescriptor'
1> c:\users\user\documents\visual studio 2010\projects\opctest3\opctest3\debug\opclabs.easyopcclassic.tlh(2350) : see declaration of 'OpcLabs_EasyOpcClassic::_DAItemDescriptor'

Last edit: 04 May 2017 14:11 by support.

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support
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04 May 2017 09:19 #5134 by support

Replied by support on topic connect the c++ to quickopc

I do not understand why you have replaced the #import-s with "libid:" with absolute file paths.

Use the #import-s precisely as in our example. If that gives a problem, tell me what the problem is.

Best regards

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TONY CHIAM
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04 May 2017 07:44 - 04 May 2017 09:16 #5133 by TONY CHIAM

Replied by TONY CHIAM on topic connect the c++ to quickopc

// $Header: $
// Copyright (c) CODE Consulting and Development, s.r.o., Plzen. All rights reserved.
// ReadMultipleItems.cpp : Defines the entry point for the console application.
//
 
 
#include "stdafx.h"
#include <atlsafe.h>
#include <comutil.h>
#include <Windows.h>
 
// mscorlib
#import "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\mscorlib.dll"    
using namespace mscorlib;
 
 //OpcLabs.BaseLib
#import "C:\Program Files (x86)\OPC Labs QuickOPC 2016.2\Lib\OpcLabs.BaseLib.tlb" \
	rename("value", "Value")
using namespace OpcLabs_BaseLib;
 
// OpcLabs.EasyOpcClassic
#import "C:\Users\User\Documents\visual studio 2010\Projects\opctest3\OpcLabs.EasyOpcClassic.tlb" \
	rename("machineName", "MachineName") \
	rename("serverClass", "ServerClass")
using namespace OpcLabs_EasyOpcClassic;
 
 
int _tmain(int argc, _TCHAR* argv[])
{
    // Initialize the COM library. Note: If you choose STA, you will be responsible for pumping messages.
    CoInitializeEx(NULL, COINIT_MULTITHREADED);
 
    // Instatiate the EasyOPC-DA client object
    _EasyDAClientPtr ClientPtr(__uuidof(EasyDAClient));
 
    _DAReadItemArgumentsPtr ReadItemArguments1Ptr(_uuidof(DAReadItemArguments));
    ReadItemArguments1Ptr->ServerDescriptor->ServerClass = L"Matrikon.OPC.OMRON.1";
    ReadItemArguments1Ptr->ItemDescriptor->ItemId = L"Test1/Test/P_MAX_CYCLE_TIME";
 
 
    CComSafeArray<VARIANT> ArgumentsArray(1);
    ArgumentsArray.SetAt(0, _variant_t((IDispatch*)ReadItemArguments1Ptr));
 
    LPSAFEARRAY pArgumentsArray = ArgumentsArray.Detach();
    CComSafeArray<VARIANT> ResultArray;
	ResultArray.Attach(ClientPtr->ReadMultipleItems(&pArgumentsArray));
    ArgumentsArray.Attach(pArgumentsArray);
 
    for (int i = ResultArray.GetLowerBound(0); i <= ResultArray.GetUpperBound(0); i++)
    {
        _DAVtqResultPtr DAVtqResultPtr(ResultArray[i]);
 
		_ExceptionPtr ExceptionPtr(DAVtqResultPtr->Exception);
		if (ExceptionPtr != NULL)
		{
	        _variant_t exceptionAsString(ExceptionPtr->ToString);
	        _tprintf(_T("results(%d).Exception.ToString(): %s\n"), i, exceptionAsString.bstrVal);
			continue;
		}
 
        _DAVtqPtr DAVtqPtr(DAVtqResultPtr->Vtq);
        _variant_t vtqAsString(DAVtqPtr->ToString);
        _tprintf(_T("results(%d).Vtq.ToString(): %s\n"), i, vtqAsString.bstrVal);
    }
 
    // Release all interface pointers BEFORE calling CoUninitialize()
    ResultArray.Destroy();
    ClientPtr = NULL;
 
    CoUninitialize();
 
    TCHAR line[80];
    _putts(_T("Press Enter to continue..."));
    _fgetts(line, sizeof(line), stdin);
    return 0;
}

Last edit: 04 May 2017 09:16 by support.

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support
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03 May 2017 20:19 #5131 by support

Replied by support on topic connect the c++ to quickopc

Please post your project (zipped) here.

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TONY CHIAM
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03 May 2017 15:41 #5130 by TONY CHIAM

Replied by TONY CHIAM on topic connect the c++ to quickopc

i import the mscorlib.dll into the programming and start debug, it come out the error -

fatal error C1083: Cannot open type library file: 'c:\program files (x86)\reference assemblies\microsoft\framework\.netframework\v4.6.1\mscorlib.dll': Error loading type library/DLL.

Thank for replying

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support
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03 May 2017 08:55 #5129 by support

Replied by support on topic connect the c++ to quickopc

Please describe the problem - the error message, and any other available details.

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TONY CHIAM
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03 May 2017 06:08 #5128 by TONY CHIAM

Replied by TONY CHIAM on topic connect the c++ to quickopc

when i copy the readmultipleitem file to a new file and try to debug, the import of the mscorlib have the problem. How i can solve the problem?? THANK

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01 May 2017 07:26 #5123 by support

Replied by support on topic connect the c++ to quickopc

For information about the libraries that need to be referenced, see e.g.:

- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...ame.html#COM%20Components.html
- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...pment%20Libraries%20(COM).html
- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...0the%20Components%20(COM).html
- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...nts%20for%20OPC%20Classic.html

In C++, after having installed QuickOPC, you basically just need to add the #import directives to the code, as shown in the code samples.

For example, from EasyOPCDADemoDlg.h file in the EasyOPCDADemo project:

#import "libid:BED7F4EA-1A96-11D2-8F08-00A0C9A6186D"    // mscorlib
using namespace mscorlib;
 
#import "System.Drawing.tlb"
using namespace System_Drawing;
 
#import "System.Windows.Forms.tlb"
using namespace System_Windows_Forms;
 
// OpcLabs.BaseLib
#import "libid:ecf2e77d-3a90-4fb8-b0e2-f529f0cae9c9" \
	rename("value", "Value")
using namespace OpcLabs_BaseLib;
 
#import "libid:A0D7CA1E-7D8C-4D31-8ECB-84929E77E331"    // OpcLabs.BaseLibForms
using namespace OpcLabs_BaseLibForms;
 
// OpcLabs.EasyOpcClassic
#import "libid:1F165598-2F77-41C8-A9F9-EAF00C943F9F" \
	rename("machineName", "MachineName") \
	rename("serverClass", "ServerClass")
using namespace OpcLabs_EasyOpcClassic;
 
#import "libid:E15CAAE0-617E-49C6-BB42-B521F9DF3983"    // OpcLabs.EasyOpcUA
using namespace OpcLabs_EasyOpcUA;
 
#import "libid:2C654FA0-6CD6-496D-A64E-CE2D2925F388"    // OpcLabs.EasyOpcForms
using namespace OpcLabs_EasyOpcForms;

Regarding connection to your specific server, I suggest that you start by determining its ProgID and then an ItemID of some "tag" in the server, and modify our example(s) with this information.

Best regards

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29 Apr 2017 17:11 #5121 by TONY CHIAM

Replied by TONY CHIAM on topic connect the c++ to quickopc

i using the classic data access. What dll. or lib. should i add to the c++ in order to make it success. Besides, i need to do what process in the quickopc part?

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