IEC 61158-4-8:2007
Industrial communication networks - Fieldbus specifications - Part 4-8: Data-link layer protocol specification - Type 8 elements

Standard No.

IEC 61158-4-8:2007

Release Date

2007

Published By

International Electrotechnical Commission (IEC)

Latest

IEC 61158-4-8:2007

Replace

IEC 65C/474/FDIS:2007 IEC 61158-4:2003

Scope

1.1 General The data-link layer provides basic time-critical messaging communications between devices in an automation environment. This protocol provides a highly-optimized means of interchanging fixed-length input/output data and variable-length segmented messages between a single master device and a set of slave devices interconnected in a loop (ring) topology. The exchange of input/output data is totally synchronous by configuration, and is unaffected by the messaging traffic. Devices are addressed implicitly by their position on the loop. The determination of the number, identity and characteristics of each device can be configured, or can be detected automatically at start-up. 1.2 Specifications This standard specifies a) procedures for the timely transfer of data and control information from one data-link user entity to a peer user entity, and among the data-link entities forming the distributed datalink service provider; b) the structure of the fieldbus DLPDUs used for the transfer of data and control information by the protocol of this standard, and their representation as physical interface data units. 1.3 Procedures The procedures are defined in terms of a) the interactions between peer DL-entities (DLEs) through the exchange of fieldbus DLPDUs; b) the interactions between a DL-service (DLS) provider and a DLS-user in the same system through the exchange of DLS primitives; c) the interactions between a DLS-provider and a Ph-service provider in the same system through the exchange of Ph-service primitives. 1.4 Applicability These procedures are applicable to instances of communication between systems which support time-critical communications services within the data-link layer of the OSI or fieldbus reference models, and which require the ability to interconnect in an open systems interconnection environment. Profiles provide a simple multi-attribute means of summarizing an implementation’s capabilities, and thus its applicability to various time-critical communications needs. 1.5 Conformance This standard also specifies conformance requirements for systems implementing these procedures. This standard does not contain tests to demonstrate compliance with such requirements.

IEC 61158-4-8:2007 Referenced Document

• IEC 61158-2 Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition*， 2023-03-09 Update
• IEC 61158-3-8 Industrial communication networks - Fieldbus specifications - Part 3-8: Data-link layer service definition - Type 8 elements
• ISO/IEC 10731 Information technology - Open Systems Interconnection - Basic Reference Model - Conventions for the definition of OSI services
• ISO/IEC 7498-1 Information technology — Open Systems Interconnection — Basic Reference Model: The Basic Model
• ISO/IEC 7498-3 Information technology - Open Systems Interconnection - Basic reference model: Naming and addressing

IEC 61158-4-8:2007 history

• 2007 IEC 61158-4-8:2007 Industrial communication networks - Fieldbus specifications - Part 4-8: Data-link layer protocol specification - Type 8 elements

IEC 61158-4-8:2007 Industrial communication networks - Fieldbus specifications - Part 4-8: Data-link layer protocol specification - Type 8 elements has been changed from IEC 61158-4:2003 Digital data communication for measurement and control - Fieldbus for use in industrial control systems - Part 4: Data link protocol specification.