Clients begin the process of accessing an OPC UA Server by creating a channel, a long term, a connection between it and an OPC UA Server.

Once a Client finds a Server, it obtains the list of available endpoints and selects an endpoint that supports the security profile and transport that matches its application requirements.

Clients find OPC UA Server devices in multiple ways.

Server devices send response messages and notifications to the OPC UA Client device.

Client devices request services from OPC UA Server devices.

Servers define object models (data types) that clients can dynamically discover. High Reliability: OPC UA uses configurable timeout settings, error checking, and allows for automatic recovery from communication failures. Servers can provide access to both real-time and historical data. Subscribe Mechanism: OPC UA clients can subscribe to tag addresses to receive real-time updates from the cMT OPC UA server when data on the factory machine changes. This ensures that your data is protected and maintains confidentiality and integrity. OPC UA uses certificates to authenticate clients and encryption to protect the connection. High Security: Robust security model (default end-to-end encryption between Client devices and Server with TLS/SSL certificates).

Information can be conveyed using OPC UA-defined and Vendor-defined data types. Tag Structure: OPC UA transmits all available tags on connection which can be clearly displayed and browsed, freeing you from memorizing addresses. This is key for supervisory control, eliminating the use of Windows-based intermediate systems to streamline the data transfer process from the field and control levels vertically to the management and enterprise levels.Ĭross-Platform: OPC UA uses standard TCP/IP to communicate, enabling OPC UA clients to operate on Linux, Windows, Mac, iOS and Android operating systems. OPC UA allows client and server applications to communicate with each other. Data is organized into objects, making it easy to access and quickly understand what the data represents, and how to use it. This protocol has built-in security with signed and encrypted data transfer using state-of-the-art encryption algorithms. OPC UA is supported by many SCADA, MES, and ERP software providers and uses a Client/Server architecture. Developed by the OPC Foundation, it is a machine to machine communication protocol for the industrial automation industry and retains all the core functions of OPC, effectively reducing the cost of system integration and allowing for data transfer between the onsite machines and upper layer management systems while still being firewall friendly. OPC UA (Unified Architecture) is the next generation of OPC, featuring cross-platform interoperability, high security, and proven reliability.

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