Port 4840
OPC UA TCP
OPC Unified Architecture (OPC UA) is a machine-to-machine communication protocol for industrial automation developed by the OPC Foundation. It is designed to facilitate the secure and reliable exchange of data in industrial control systems, supporting complex data modeling while remaining platform-independent..
Technical Details
OPC Unified Architecture (OPC UA) is an industry-standard communication protocol that enables secure, platform-independent exchange of industrial data. It serves as a successor to older OPC specifications, combining their functionalities and adding cross-platform and security enhancements. OPC UA abstracts hardware interfaces and provides a unified, object-oriented data model supporting complex system requirements.
Communication is primarily handled over TCP for reliable data transfer. Port 4840 is the default TCP port utilized for establishing OPC UA binary TCP connections, enabling efficient transmission of data. OPC UA supports additional transport mappings including Web Services bindings; however, TCP binary is commonly preferred due to performance benefits in real-time industrial contexts.
Designed for scalability, OPC UA can operate on embedded devices, factory floor PCs, and cloud environments. It enables not just data acquisition but also command/control interactions within SCADA, MES, and IoT systems. Its information modeling capabilities allow for rich semantic data representation that facilitates interoperability across multi-vendor industrial solutions.