61765-2

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Terminals - Adapters have been used in the past to connect different digital systems, such as computer systems, to one another. These systems, however, need to be able to communicate in order to send and receive data or information between them. To enable this efficient communication, standardized protocols are used.

61765-2 is one such protocol. It was developed and utilized to provide a reliable and efficient solution for digital systems’ communication. This protocol is used to enable communication between different types of digital systems, including, but not limited to, automation systems, such as Programmable Logic Controllers (PLCs). This ensures that data and information from a given system, such as a PLC, can be exchanged with another digital system, such as a supervisory control system or a communications system.

61765-2 Application Field and Working Principle define the digital communication methods and parameters for interoperability between diverse systems. The standard supports both user specific and open/public communication by allowing the transfer of data in digital form in a reliable and secure manner. It covers the physical layer and additional layers up to and including the application layer, and defines the meaning of the different types of communication. It describes the system architecture and the different physical interfaces, allowing connections with all types of other digital systems, including those using different communication protocols.

At its core, 61765-2 defines a standard for communication using a physical layer and a data link protocol with frames, which is then presented to the user in the form of a virtual serial connection. This allows for the exchange of data between two different systems, allowing them to interact and exchange information with each other. The protocol also defines error detection and error control procedures, ensuring that messages are sent and received in an orderly and reliable way. It also defines management messages, allowing for various operations, such as the negotiation of virtual circuit connectors and the transmission of time-sensitive information, to be achieved between systems.

Furthermore, 61765-2 has an additional layer known as the transport layer, this layer provides end to end control of connections between systems. It is responsible for the reliability of connections between two systems and it ensures that any message sent will not be lost or corrupted during transport. This layer also has an important role as it ensures that messages can traverse over different types of communication lines, such as serial or Ethernet and over different types of physical media, such as fiber, copper or wireless.

Overall, 61765-2 is an essential protocol when considering communication between different systems. It is a widely used standard and provides reliable and secure data exchange between systems. It is designed to be interoperable and extensible, allowing for communication between different systems, even when these systems are running different protocols and have different communication capabilities. This protocol is vital for the efficient communication between different digital systems and its use ensures seamless interaction between different digital systems.

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