21985-7

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21985-7 is a standard for industrial control systems. It is based on a concept of communication and interoperability called "OPC UA," which enables equipment and systems to connect, exchange data, and access control over distributed operations. This is important for operators to have information they can trust, so they can quickly take informed decisions.

This standard is widely used in the automation field. It provides an abstraction of all communication and structure within industrial automation systems. It can be used to integrate and control distributed systems such as production, logistics, supply chain, network, laboratory, and supporting services.

It is based on an object model with different components called nodes which can be attached to a tree configuration, thereby creating what is called an address space. This model is further built on the OPC-UA protocol and its subset of related protocols and tools such as the Hierarchical System Identification Model (HSIM), the Service Discovery Protocol (SDP), and the Access Right Control Language (ARCL).

The OPC-UA model provides an effective way to access and control data within industrial automation systems. It enables operators to have better control over various operations and allows them to easily monitor and control production processes. It also provides a secure and reliable communication platform for remote and distributed systems.

The protocol enables data to be read or written from multiple devices and sensors and enables them to communicate with each other over a secure channel. It also provides support for digital signing and encryption of data, allowing operators to securely transmit information.

This protocol also supports a variety of security models, including authentication, encryption, audit, authorization, and logging of access and events. This helps in providing a secure environment for information access and control.

The OPC-UA protocol enables a simple device-to-device communication and is suitable for both centralized and distributed architectures. It also supports both synchronous and asynchronous communications. It offers a broad range of services for both system and device configuration and communication as well as a range of specialized, high-performance communication services.

Finally, the protocol also requires that the user must provide authentication information before certain services or actions can take place. This allows the system to keep track of who has logged in and who is allowed to access certain information or control system components. It also helps to ensure the safety and reliability of the system.

OPC-UA is quickly becoming the de facto standard for industrial automation systems. Its flexibility, scalability, and security make it the ideal choice for the automation of production and control processes in an industrial setting. It has been adopted by various organizations and is increasingly being used in various industrial applications.

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