Norm

NEN-EN-IEC 61158-4-24:2014 en

Industri?le communicatienetwerken - Veldbus specificaties - Deel 4-24: Protocolspecificatie van de gegevensverbindingslaag - Type 24 elementen

280,76

Over deze norm

Status Definitief
Aantal pagina's 238
Commissie Industrieel meten, regelen en automatiseren
Gepubliceerd op 01-11-2014
Taal Engels
The data-link layer provides basic time-critical messaging communications between devices in an automation environment. This protocol provides communication opportunities to all participating data-link entities a) in a synchronously-starting cyclic manner, according to a pre-established schedule, or b) in an acyclic manner, as requested by each of those data-link entities. Thus this protocol can be characterized as one which provides cyclic and acyclic access asynchronously but with a synchronous restart of each cycle. 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) procedures for giving communications opportunities to all participating DL-entities, sequentially and in a cyclic manner for deterministic and synchronized transfer at cyclic intervals up to 64 ms; c) procedures for giving communication opportunities available for time-critical data transmission together with non-time-critical data transmission without prejudice to the time-critical data transmission; d) procedures for giving cyclic and acyclic communication opportunities for time-critical data transmission with prioritized access; e) procedures for giving communication opportunities based on standard ISO/IEC 8802-3 medium access control, with provisions for nodes to be added or removed during normal operation; f) 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.

Details

ICS-code 25.040.40
35.100.20
35.110
Nederlandse titel Industri?le communicatienetwerken - Veldbus specificaties - Deel 4-24: Protocolspecificatie van de gegevensverbindingslaag - Type 24 elementen
Engelse titel Industrial communication networks - Fieldbus specifications - Part 4-24: Data-link layer protocol specification - Type 24 elements

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