IEC 62439-1-2016 pdf free
IEC 62439-1-2016 pdf free.Industrial communication networks – High availability automation networks – Part 1: General concepts and calculation methods.
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050-191:1990. International EIectrotechncaI Vocabulary — Chapter 191: Dependability and quality of service
IEC 61158 (all parts), Industrial communication networks — Fieldbus specifications
IEC 61158-6-10. Industrial communication networks — Fieldbus specifications — Part 6-10:
Application layer protocol specification — Type 10 elements
ISOIIEC 8802-3:2000, Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications
IEEE 802.1Q, IEEE standards for local and metropolitan area network. Virtual bridged local area networks
IEEE 802.1D:2004, IEEE standard for local Local and metropolitan area networks Media Access Control (MAC) Bridges
IETF RFC 791, Internet Protocol; available at <http://www.ietf.org>
3 Terms, definitions, abbreviations, acronyms, and conventions
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-191, as well as the following, apply
3.1.1 availability (performance)
ability of an item to be in a state to perform a required function under given conditions at a given instant of time or over a given time interval, assuming that the required external resources are provided
NOTE 1 This ability depends on the combined aspects of the reliability performance, the maintainability performance, and the maintenance support performance.
NOTE 2 Required external resources. other than maintenance resources. do not affect the availability performance of the item.
(1EV 191-02-05]
3.1.2 channel
layer 2 connection between two end nodes which Consists of one or more paths (for redundancy) between end nodes
3.1.3 common mode failure
failure that affects all redundant elements for a given function at the same time
3.1.4 complete failure
failure which results in the complete inability of an item to perform all required functions
[1EV 191-04-20]
3.1.5 connection
logical relationship between two nodes
3.1.6 coverage
probability that a failure is discovered within a time short enough for redundancy to handle it, also expressing the percentage of failures caught up by redundancy vs. total number of failures.IEC 62439-1 pdf download.
