Prosys OPC Classic Client will help you to test and troubleshoot connections to OPC Classic servers. You can read and write data, browse servers and export and import address space.
Features
OPC Data Access (DA) version 1.0A and 2.05 communication
Any number of OPC Client connections, OPC Groups and OPC Items
Transaction logging (data changes, reads, and writes)
UI for visualizing and changing internal variable values
Source Code
The application comes with source code that can be used to build it together with Prosys Sentrol OPC UA & Classic SDK for Delphi OPC Classic components.