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Although developed by the same organization, OPC UA differs significantly from its predecessor, Open Platform Communications (OPC). The Foundation's goal for OPC UA was to provide a path forward from the original OPC communications model (namely the Microsoft Windows-only process exchange COM/DCOM) that would better meet the emerging needs of industrial automation.
The OPC specification was based on the OLE, COM, and DCOM technologies developed by Microsoft Corporation for the Microsoft Windows operating system family. The specification defined a standard set of objects, interfaces e.g. IDL and methods for use in process control and manufacturing automation applications to facilitate interoperability.
The OPC Data Access Specification is the first of a group of specifications known as the OPC Classic Specifications. [1]OPC Data Access is a group of client–server standards that provides specifications for communicating real-time data from data acquisition devices such as PLCs to display and interface devices like Human–Machine Interfaces (HMI), SCADA systems [2] and also ERP/MES systems. [3]
The OPC Foundation (Open Platform Communications, formerly Object Linking and Embedding for Process Control [1]) is an industry consortium that creates and maintains standards for open connectivity of industrial automation devices and systems, such as industrial control systems and process control generally.
OPC UA Connection Protocol (TCP) and OPC UA Multicast Datagram Protocol (UDP) for OPC Unified Architecture from OPC Foundation: 4843: Yes: OPC UA TCP Protocol over TLS/SSL for OPC Unified Architecture from OPC Foundation: 4847: Yes: Web Fresh Communication, Quadrion Software & Odorless Entertainment 4848: Unofficial
The OPC-UA Ignition module is an Eclipse Milo OPC server that supports modular drivers for PLCs and other devices and network connections. Before moving to Milo, the Ignition OPC-UA engine was the first 100% native Java OPC UA stack. [ 12 ]
Ever since what was effectively a 2-for-1 stock split back in April 2016, there were two publicly traded classes of Under Armour (ticker: UA , UAA ) stock: Class A shares which traded under the ...
The OPC Foundation and Sercos International developed an OPC UA companion specification [12] which describes the mapping of Sercos to OPC UA. This makes the functions and parameters of Sercos III devices available to OPC UA, independent of any vendor. This simplifies communication between machine automation devices and higher-level supervisory ...