RSLinx Classic Gateway is the flagship communication server package from Rockwell Automation. It is essential for engineers and system integrators who need to provide OPC (OLE for Process Control) connectivity and DDE (Dynamic Data Exchange) services to external applications while simultaneously acting as a programming interface for PLCs.

For simple programming or testing, use the free instead – it is legal, safe, and downloadable without a support contract. Disclaimer: This article is for informational purposes. Product names are trademarks of Rockwell Automation, Inc. Always download software from the official vendor to ensure security and compliance.