Refrigerating systems and heat pumps — Competence of personnel
This document defines the activities related to refrigerating systems according to ISO 5149‑1, ISO 5149‑2, ISO 5149‑3 and ISO 5149‑4 and other equivalent standards, such as EN 378‑1, EN 378‑2, EN 378‑3, EN 378‑4 and the associated competence profiles. It also establishes the competence criteria for persons who carry out these activities. Activities concerning electricity are excluded.
NOTE 1 As…
Industrial communication networks - Fieldbus specifications - Part 3-2: Data-link layer service defi...
IEC 61158-3-2:2023 is one of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the "three-layer" fieldbus reference model described in IEC 61158‑1.
Throughout the set of fieldbus standards, the term "service" refers to the abstract capability provided by one layer of the OSI Basic…
Industrial communication networks - Fieldbus specifications - Part 4-2: Data-link layer protocol spe...
IEC 61158-4-2:2023 is one of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the "three-layer" fieldbus reference model described in IEC 61158‑1.
The data-link protocol provides the data-link service by making use of the services available from the physical layer. The primary aim of this…
Industrial communication networks - Fieldbus specifications - Part 5-23: Application layer service d...
IEC 61158-5-25:2023 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 23 fieldbus. The term "time-critical" is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level…
Industrial communication networks - Fieldbus specifications - Part 5-24: Application layer service d...
IEC 61158-5-24:2023 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 24 fieldbus. The term "time-critical" is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level…
Industrial communication networks - Fieldbus specifications - Part 3-2: Data-link layer service defi...
IEC 61158-3-2:2023 is one of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the "three-layer" fieldbus reference model described in IEC 61158‑1.
Throughout the set of fieldbus standards, the term "service" refers to the abstract capability provided by one layer of the OSI Basic…
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 3-2: Définition de...
L’IEC 61158-3-2:2023 fournit les éléments communs pour les communications de messagerie prioritaires entre les appareils d’un environnement d’automatisation. Le terme "prioritaire" est utilisé pour indiquer la présence d’une fenêtre temporelle, dans laquelle il est exigé de réaliser une ou plusieurs actions spécifiées selon un niveau défini de certitude. La non-réalisation des actions…
Industrial communication networks - Fieldbus specifications - Part 4-2: Data-link layer protocol spe...
IEC 61158-4-2:2023 is one of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the "three-layer" fieldbus reference model described in IEC 61158‑1.
The data-link protocol provides the data-link service by making use of the services available from the physical layer. The primary aim of this…
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-2: Spécification...
L'IEC 61158-4-2:2023 appartient à la série de normes visant à faciliter l’interconnexion des composants du système d’automatisation. Elle est liée aux autres normes de la série telle que définie par le modèle de référence de bus de terrain "à trois couches" décrit dans l’IEC 61158‑1.
Le protocole de liaison de données assure un service de liaison de données en s’appuyant sur les…
