OPC Data Logger licenses are a perpetual license, you own the license forever, and annual payments are not required for continued operation. Your initial purchase includes technical support and upgrades/updates/bug fixes for a year from purchase. Support & Maintenance can be renewed annually and is highly recommended to remain OS compatible, obtain new features, and assure optimal, secure operation. Subscription & volume pricing available upon request.
OPC Data Logger Text File Edition, Perpetual License
Part # 41100110-N
OPC Data Logger Professional Edition, Perpetual License
Part # 41100119-N
The trial software is the full product and can log to any supported file or database format with no tag count limits. Once the OPC Data Logger starts logging, it will stop after 2 hours. You can restart it but all logging will stop after 30 days.