IEC PAS 61158-4-22:2009

FOREWORD
1 Scope
  1.1 General
  1.2 Specifications
  1.3 Procedures
  1.4 Applicability
  1.5 Conformance
2 Normative references
3 Terms, definitions, symbols, abbreviations and conventions
  3.1 Reference model terms and definitions
  3.2 Service convention terms and definitions
  3.3 Common terms and definitions
  3.4 Additional Type SNpTYPE definitions
  3.5 Common symbols and abbreviations
  3.6 Additional Type SNpTYPE symbols and abbreviations
  3.7 Conventions
       3.7.1 Abstract syntax conventions
       3.7.2 Protocol machine description conventions
4 DL-protocol overview
  4.1 Operating principle
  4.2 Communication model
       4.2.1 Overview
       4.2.2 RTFL device reference model
       4.2.3 RTFN device reference model
  4.3 Topology
       4.3.1 RTFL topology
       4.3.2 RTFN topology
  4.4 Frame processing
       4.4.1 Communication model RTFL
       4.4.2 Communication model RTFN
  4.5 General communication mechanisms
       4.5.1 Cyclic data channel (CDC)
       4.5.2 Message channel (MSC)
  4.6 Gateway
  4.7 Interaction models
       4.7.1 Overview
       4.7.2 Producer-consumer
       4.7.3 Publisher-subscriber
5 DLPDU structure
  5.1 Overview
  5.2 Data types and encoding rules
       5.2.1 Overview
       5.2.2 Transfer syntax for bit sequences
       5.2.3 Unsigned Integer
       5.2.4 Signed Integer
       5.2.5 Octet Array
  5.3 DLPDU identification
  5.4 General DLPDU structure
       5.4.1 Type SNpTYPE frame inside an Ethernet frame
       5.4.2 Type SNpTYPE frame inside a VLAN tagged Ethernet
              frame
       5.4.3 Type SNpTYPE frame inside an UDP datagram
       5.4.4 Type SNpTYPE frame structure
  5.5 Communication management DLPDUs
       5.5.1 Network verification DLPDUs
       5.5.2 RTFN scan network read DLPDUs
       5.5.3 Identification data
       5.5.4 RTFN connection management DLPDU
       5.5.5 ID data
       5.5.6 RTFL control DLPDU
       5.5.7 RTFL configuration DLPDUs
  5.6 Cyclic data channel (CDC) DLPDUs
       5.6.1 Cyclic data channel line (CDCL) DLPDU
       5.6.2 Cyclic data channel network (CDCN) DLPDU
  5.7 Cyclic data channel (CDC) DLPDU data
       5.7.1 Cyclic data channel (CDC) DLPDU data arrangement
       5.7.2 Cyclic data channel (CDC) DLPDU data
  5.8 Message channel (MSC) DLPDUs
       5.8.1 Message channel line (MSCL) DLPDU
       5.8.2 Message channel network (MSCN) DLPDU
  5.9 Message channel DLPDU data - MSC message transfer
       protocol (MSC-MTP)
       5.9.1 Overview
       5.9.2 MSC-MTP frame
       5.9.3 MSC-MTP frame data
       5.9.4 MSC-MTP message data encoding
  5.10 Time synchronization
       5.10.1 DelayMeasurement start
       5.10.2 DelayMeasurement read
       5.10.3 PCS configuration
       5.10.4 Time synchronization service
6 Telegram timing and DLPDU handling
  6.1 Communication mechanism
       6.1.1 Communication model RTFL
       6.1.2 Communication model RTFN
  6.2 Device synchronization
       6.2.1 Communication model RTFL - precise clock
              synchronization
       6.2.2 Communication model RTFN
7 Type SNpTYPE protocol machines
  7.1 RTFL device protocol machines
       7.1.1 Overview
       7.1.2 PortX protocol machine (PortX PM)
       7.1.3 Frame handling protocol machine (FHPM)
       7.1.4 Cyclic data channel line protocol machine (CDCLPM)
       7.1.5 Message channel line protocol machine (MSCLPM)
       7.1.6 Message channel message transfer protocol protocol
              machine (MSCMTP PM)
       7.1.7 Net management protocol machine (NMPM)
       7.1.8 Precise clock synchronization (PCS)
  7.2 RTFN device protocol machines
       7.2.1 Overview
       7.2.2 Cyclic data channel network protocol machine
              (CDCNPM)
       7.2.3 Message channel network protocol machine (MSCNPM)
       7.2.4 Message channel message transfer protocol protocol
              machine (MSCMTP PM)
       7.2.5 Net management protocol machine (NMPM)
  7.3 Message channel - message transfer protocol (MSC-MTP)
       7.3.1 Overview
       7.3.2 MSC-MTP PM

IEC/PAS 61158-4-22:2009(E) provides basic time-critical messaging communications between devices in an automation environment. This protocol provides communication opportunities to all participating data-link entities in a synchronously-starting cyclic manner, according to a pre-established schedule, and in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those data-link entities. It contains an additional profile - SNpTYPE - which may be integrated into a future new edition of the IEC 61158-4 series.