EN 61158-6-8:2008

FOREWORD
INTRODUCTION
1 Scope
   1.1 General
   1.2 Specifications
   1.3 Conformance
2 Normative references
3 Terms and definitions
   3.1 ISO/IEC 7498-1 terms
   3.9 ISO/IEC 8822 terms
   3.11 ISO/IEC 9545 terms
   3.16 ISO/IEC 8824 terms
   3.37 ISO/IEC 8825 terms
   3.40 Terms and definitions from IEC 61158-5-8
   3.47 Other terms and definitions
4 FAL syntax description
   4.1 FAL-AR PDU abstract syntax
   4.2 Abstract syntax of PDUBody
   4.3 Type definitions for ASEs
   4.4 Object definitions
   4.5 Abstract syntax of Data types
5 Transfer syntax
   5.1 Peripherals encoding rules (PER)
   5.2 Encoding of APDU types
   5.3 Encoding of tagged type values
   5.4 Encoding of simple values
6 Protocol machine overview
7 AP-context state machine
   7.1 Primitive definitions
   7.2 State machine description
   7.3 AP to AP-context initiation state transitions
   7.4 Functions
8 FAL service protocol machine (FSPM)
   8.1 Summary
   8.2 Primitive definitions
   8.3 FSPM state tables
9 Application relationship protocol machines (ARPMs)
   9.1 Queued user-triggered bidirectional-flow control
        (QUB-FC) ARPM
   9.2 Buffered network-scheduled unidirectional (BNU) ARPM
   9.3 Queued user-triggered bidirectional - transparent mode
        (QUB-TM) ARPM
10 DLL mapping protocol machine
   10.1 Overview
   10.2 Primitive definitions
   10.3 DMPM state machine
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 2 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 from the previous edition deletion of the former Type 6 fieldbus for lack of market relevance; addition of new types of fieldbuses; partition of part 6 of the third edition into multiple parts numbered.