Standards-based connectivity for OPC client applications
TOP Server supports OPC server-side interfaces for the OPC Classic Data Access (DA) industry standards as well as OPC Unified Architecture (DA Profile) and OPC .NET 3.0 with any driver license at no extra cost.
OPC Classic Alarms and Events are also supported for the Event Log (Simple Events only - other OPC AE data requires the OPC Alarms & Events plug-in).
TOP Server also provides an OPC Classic Historical Data Access (HDA) interface when using the TOP Server Local Historian plug-in for low volume historical data storage up to 10,000 tags (requires at least one communication driver for data collection).