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OPC HDA Client Toolkit – Legacy Product Overview

A Complete Toolkit for OPC Historical Data Access

  • Complete toolkit for developing OPC HDA client applications
  • Designed for Visual Basic 6 and C++ developers
  • Full support for OPC Historical Data Access (HDA) specification
  • Supports both required and optional OPC HDA interfaces
  • Simplifies COM-based OPC interactions through an intuitive API
  • Enables access to raw, processed, and aggregated historical data
  • Supports synchronous and asynchronous data reads and updates
  • Compatible with any compliant OPC HDA server
  • Ideal for maintaining and extending legacy OPC HDA applications
OPC HDA Client Toolkit architecture diagram: historical data access integration in VB and C++

OPC HDA Client Toolkit – Legacy Product Features

Server Connectivity and Discovery

  • Listing of all local or remote OPC HDA servers available within the network  
  • Simultaneous connection to multiple local or remote OPC HDA servers  
  • Browsing of any OPC HDA server address space 

Data Access Capabilities

  • Raw Data  
  • Data at specific times 
  • Processed data (interpolative, minimum, maximum, average, range, total aggregates) 
  • Modified data 
  • Item attributes 

Data Update Capabilities

  • Insert or replace item values  
  • Delete raw data 
  • Delete data at specific times 

Integration and Communication

  • Efficient communication interface between the end-user application and the toolkit using callbacks 

Development Support

  • Sample source code for Visual Basic client applications  
  • Building OPC HDA client applications using Visual Basic 6 
  • Building OPC HDA client applications using C++ (Visual Studio 2010 and higher) 

Licensing

  • Royalty-free runtime distribution 

Frequently Asked Questions

The toolkit supports application development in Visual Basic 6 and C++ (Visual Studio 2010 and higher), with sample source codes included for a quicker learning curve. 

Yes. The toolkit supports simultaneous connections to multiple local and remote OPC HDA servers. 

Absolutely. You can browse the address space of any connected OPC HDA server for easy tag discovery and selection. 

Yes. The toolkit is licensed per development machine and applications developed using the OPC HDA Client Toolkit can be distributed without any additional runtime licensing fees. 

The OPC HDA Client Toolkit is a legacy product.  


Please contact us here for support options. 

Resources & Documentation

OPC HDA Client Toolkit – Legacy Product Resources

Product Datasheet

Comprehensive technical specifications and features overview

User Guide

Step-by-step installation and configuration guide