EN 61158-5-17:2008

FOREWORD
INTRODUCTION
1 Scope
  1.1 Overview
  1.2 Specifications
  1.3 Conformance
2 Normative references
3 Definitions
  3.1 Terms and definitions
  3.2 Abbreviations and symbols
  3.3 Conventions
4 Concepts
  4.1 General
  4.2 Relationships between ASEs
  4.3 FAL ASEs
  4.4 Common FAL service parameters
5 ASEs
  5.1 Variable ASE
  5.2 Event ASE
  5.3 Load region ASE
  5.4 Function invocation ASE
  5.5 Time ASE
  5.6 Network management ASE
  5.7 Application relationship ASE
6 ARs
  6.1 General
  6.2 Point-to-point user-triggered confirmed client/server
      AREP (PTC-AR)
  6.3 Point-to-point user-triggered unconfirmed client/server
      AREP (PTU-AR)
  6.4 Point-to-point network-scheduled unconfirmed
      publisher/subscriber AREP (PSU-AR)
  6.5 Multipoint user-triggered unconfirmed publisher/subscriber
      AREP (MTU-AR)
  6.6 Multipoint network-scheduled unconfirmed
      publisher/subscriber AREP (MSU-AR)
7 Summary of FAL classes
8 Permitted FAL services by AREP role
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

It 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 17 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. It includes the following significant changes with respect to the previous edition deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data-link layer, for lack of market relevance; addition of new types of fieldbuses; division of this part into multiple parts numbered.