OPCDAClientSync

c++ class for easy interaction with OPC servers of the OPC DA 2.05a specification

Description

• OPCDAClientSync written in C++
• No external dependencies, only the ATL and Standard library is used (included as standart component for Visual Studio)
• Supported both versions of client X86 and X64 for server X86 and X64 in any combination
• Supported only sync read and sync write operations from OPC DA 2.05a specification
• Low memory usage
• High productivity:
  • 59.9 seconds for 1 000 000 read operations for local OPC Server (Intel Core i5-7200U processor)
  • 53.3 seconds for 1 000 000 write operations for local OPC Server (Intel Core i5-7200U processor)
• Tested on
  • Windows 10 (x64) with VS2019 build with x86 project.
  • Windows 10 (x64) with VS2019 build with x64 project.
• Simple usage:
  • Only two files for usage: OPCDAClientSync.h and OPCDAClientSync.cpp
  • All readed and writed values is std::wstring.
  • On any error throw std::exception
• Included Visual Studio 2019 solution OPCDAClientSync.sln and project OPCDAClientSync.vcxproj

Usage

#include "OPCDAClientSync.h"

void test(void)
{
	OPCDAClientSync opc (L"Graybox.Simulator.1");
	opc.WriteItem (L"storage.string.reg01", L"aaa");
	std::wstring aaa = opc.ReadItem (L"storage.string.reg01");
}

void main(void)
{
	OPCDAClientSync::Initialize();
	test();
	OPCDAClientSync::Uninitialize ();
}

Tips

• OPCDAClientSync::Initialize() must be called in every thread, before using this class
• OPCDAClientSync::Uninitialize() must be called in every thread, after using this class
• Gray Simulator can be used for testing http://gray-box.net/download_graysim.php

Detail & ChangeLog

• Date: 2020-08-10
  • First release