Norm

NEN-EN-IEC 61158-4-22:2014 en

Industri?le communicatienetwerken - Veldbus specificaties - Deel 4-22: Protocolspecificatie van de gegevensverbindingslaag - Type 22 elementen

253,59

Over deze norm

Status Definitief
Aantal pagina's 138
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, and b) in a cyclic or acyclic asynchronous manner, as requested each cycle 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) 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. 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.

Details

ICS-code 25.040.40
35.100.20
35.110
Nederlandse titel Industri?le communicatienetwerken - Veldbus specificaties - Deel 4-22: Protocolspecificatie van de gegevensverbindingslaag - Type 22 elementen
Engelse titel Industrial communication networks - Fieldbus specifications - Part 4-22: Data-link layer protocol specification - Type 22 elements
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