🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS EN 61158-5-23:2014

BS EN 61158-5-23:2014

$215.11

Industrial communication networks. Fieldbus specifications – Application layer service definition. Type 23 elements

Published By Publication Date Number of Pages
BSI 2014 94
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

1.1 General

The fieldbus Application Layer (FAL) provides user programs with a means to access the fieldbus communication environment. In this respect, the FAL can be viewed as a “window between corresponding application programs.”

This standard 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 12 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 of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life.

This standard defines in an abstract way the externally visible service provided by the different Types of the fieldbus Application Layer in terms of

  1. an abstract model for defining application resources (objects) capable of being manipulated by users via the use of the FAL service,

  2. the primitive actions and events of the service;

  3. the parameters associated with each primitive action and event, and the form which they take; and

  4. the interrelationship between these actions and events, and their valid sequences.

The purpose of this standard is to define the services provided to

  1. the FAL user at the boundary between the user and the Application Layer of the Fieldbus Reference Model, and

  2. Systems Management at the boundary between the Application Layer and Systems Management of the Fieldbus Reference Model.

This standard specifies the structure and services of the IEC fieldbus Application Layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI Application Layer Structure (ISO/IEC 9545).

FAL services and protocols are provided by FAL application-entities (AE) contained within the application processes. The FAL AE is composed of a set of object-oriented Application Service Elements (ASEs) and a Layer Management Entity (LME) that manages the AE. The ASEs provide communication services that operate on a set of related application process object (APO) classes. One of the FAL ASEs is a management ASE that provides a common set of services for the management of the instances of FAL classes.

Although these services specify, from the perspective of applications, how request and responses are issued and delivered, they do not include a specification of what the requesting and responding applications are to do with them. That is, the behavioral aspects of the applications are not specified; only a definition of what requests and responses they can send/receive is specified. This permits greater flexibility to the FAL users in standardizing such object behavior. In addition to these services, some supporting services are also defined in this standard to provide access to the FAL to control certain aspects of its operation.

1.2 Specifications

The principal objective of this standard is to specify the characteristics of conceptual application layer services suitable for time-critical communications, and thus supplement the OSI Basic Reference Model in guiding the development of application layer protocols for time-critical communications.

A secondary objective is to provide migration paths from previously-existing industrial communications protocols. It is this latter objective which gives rise to the diversity of services standardized as the various Types of IEC 61158, and the corresponding protocols standardized in subparts of IEC 61158-6.

This specification may be used as the basis for formal Application Programming-Interfaces. Nevertheless, it is not a formal programming interface, and any such interface will need to address implementation issues not covered by this specification, including

  1. the sizes and octet ordering of various multi-octet service parameters, and

  2. the correlation of paired request and confirm, or indication and response, primitives.

1.3 Conformance

This standard does not specify individual implementations or products, nor does it constrain the implementations of application layer entities within industrial automation systems.

There is no conformance of equipment to this application layer service definition standard. Instead, conformance is achieved through implementation of conforming application layer protocols that fulfill any given Type of application layer services as defined in this standard.

PDF Catalog

PDF Pages PDF Title
6 English

CONTENTS
8 INTRODUCTION
9 1 Scope
1.1 General
10 1.2 Specifications
1.3 Conformance
2 Normative references
11 3 Terms, definitions, symbols, abbreviated terms and conventions
3.1 Referenced terms and definitions
12 3.2 Type 23 specific terms and definitions
14 3.3 Symbols and abbreviated terms
15 3.4 Conventions
18 4 Concept
5 Data type ASE
5.1 Overview
5.2 Fixed length types
23 6 Communication model specification
6.1 Communication model
24 Figures

Figure 1 – Cyclic model (n:n type distributed shared memory, unconfirmed push model)
Figure 2 – Cyclic model (1:n type distributed shared memory, unconfirmed push model)
Figure 3 – Transient model (Client server model)
25 6.2 ASE
Figure 4 – Transient model (Push model)
Figure 5 – Structure of ASE type C of FAL type 23
Figure 6 – Structure of ASE type F of FAL type 23
27 Tables

Table 1 – Ld service parameters
Table 2 – Set service parameters
Table 3 – Reset service parameters
28 Table 4 – Read service parameters
Table 5 – Write service parameters
29 Table 6 – Ld service parameters
30 Table 7 – Set service parameters
Table 8 – Reset service parameters
31 Table 9 – Read service parameters
Table 10 – Write service parameters
33 Table 11 – Ld service parameters
34 Table 12 – Set service parameters
Table 13 – Reset service parameters
Table 14 – Read service parameters
35 Table 15 – Write service parameters
38 Table 16 – Get memory access info service parameters
39 Table 17 – Run service parameters
Table 18 – Stop service parameters
40 Table 19 – Read memory service parameters
41 Table 20 – Write memory service parameters
43 Table 21 – Get memory access info service parameters
44 Table 22 – Run service parameters
45 Table 23 – Stop service parameters
46 Table 24 – Read memory service parameters
47 Table 25 – Write memory service parameters
48 Table 26 – Vendor command service parameters
49 Table 27 – Distribute node info service parameters
50 Table 28 – Get statistics service parameters
51 Table 29 – Get node info detail service parameters
54 Table 30 – AC data service parameters
55 Table 31 – AC data ND service parameters
56 Table 32 – Get attribute service parameters
Table 33 – Set attribute service parameters
58 Table 34 – Synchronization trigger service parameters
59 Table 35 – Start measurement service parameters
60 6.3 AR type C
Figure 7 – Structure of AR type C
Table 36 – Get offset service parameters
64 Table 37 – Control cyclic service parameters
66 Table 38 – CT Update service parameters
67 Table 39 – AC Send service parameters
68 Table 40 – AC Param send service parameters
73 6.4 AR type F
Figure 8 – Structure of AR type F
Table 41 – CPD Set service parameters
80 Table 42 – Control cyclic service parameters
82 Table 43 – CT Update service parameters
83 Table 44 – AC Send service parameters
84 Table 45 – AC Send ND service parameters
88 Table 46 – Synchronous trigger internal service parameters
89 Table 47 – Measure send service parameters
90 Table 48 – MeasureAck send service parameters
Table 49 – Offset send service parameters
91 Table 50 – Update send service parameters
92 Bibliography
BS EN 61158-5-23:2014
$215.11