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

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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

What programming languages are supported by the OPC HDA Client Toolkit?Compatibility

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.

Can I connect to multiple OPC HDA servers at the same time?Connectivity

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

Does the toolkit support browsing of OPC HDA server address spaces?Discovery

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

Is runtime distribution royalty-free?Licensing

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.

Is technical support available?Support

The OPC HDA Client Toolkit is a legacy product.

Please contact us here for support options.

Resources & Documentation

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