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BS EN IEC 61158-4-4:2019 - TC Tracked Changes. Industrial communication networks. Fieldbus specifications - Data-link layer protocol specification. Type 4 elements, 2020
- 30395579_NEW.pdf [Go to Page]
- undefined
- Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope [Go to Page]
- 1.1 General
- 1.2 Specifications
- 1.3 Procedures
- 1.4 Applicability
- 1.5 Conformance
- 2 Normative references
- 3 Terms, definitions, symbols and abbreviations [Go to Page]
- 3.1 Reference model terms and definitions
- 3.2 Service convention terms and definitions
- 3.3 Terms and definitions
- 3.4 Symbols and abbreviations [Go to Page]
- 3.4.1 Constants, variables, counters and queues
- 3.4.2 Miscellaneous
- 4 Data Link Protocol Definition [Go to Page]
- 4.1 Overview of the DLprotocol [Go to Page]
- 4.1.1 Functional classes
- 4.1.2 Functions of the DLL
- Figures [Go to Page]
- Figure 1 – Relationship of PhE, DLE and DLS-user
- Figure 2 – DLE state diagram for confirmed and unconfirmed, unacknowledged DLPDUs
- Figure 3 – DLE state diagram for confirmed acknowledged DLPDUs
- Figure 4 – DLE state diagram for unconfirmed acknowledged DLPDUs
- Figure 5 – Full duplex DLE receive state diagram
- Figure 6 – Full duplex DLE transmit state diagram
- Figure 7 – Link access example [Go to Page]
- 4.1.3 Service assumed from the PhL
- 4.2 General structure and encoding of PhIDUs and DLPDUs, and related elements of procedure [Go to Page]
- 4.2.1 PhIDU structure and encoding
- 4.2.2 Frame check sequence
- 4.2.3 Common DLPDU structure, encoding and elements of procedure
- Figure 8 – Simple Type 4-route format
- Figure 9 – Extended Type 4-route format
- Figure 10 – Complex Type 4-route format
- Figure 11 – Immediate Type 4-route format
- Figure 12 – IP Type 4-route format
- Figure 13 – Control-status format
- Figure 14 – Data-field-format
- 4.3 DLPDU-specific structure, encoding and elements of procedure [Go to Page]
- 4.3.1 Confirmed DLPDU
- Tables [Go to Page]
- Table 1 – Summary structure of DLPDUs [Go to Page]
- 4.3.2 Unconfirmed DLPDU
- Table 2 – Structure of confirmed DLPDUs
- Table 3 – Structure of unconfirmed DLPDUs [Go to Page]
- 4.3.3 Acknowledge DLPDU
- 4.3.4 Immediate-reply DLPDU
- Table 4 – Structure of acknowledge DLPDU
- Table 5 – Structure of immediate-reply DLPDU
- 4.4 DLservice elements of procedure [Go to Page]
- 4.4.1 Receipt of a DLUnitdata request primitive
- 4.4.2 Receipt of a DLUnitdata response primitive
- 4.4.3 Autonomous DLE acknowledge
- 4.4.4 Generation of a DLUnitdata indication primitive
- 4.5 Route mechanism [Go to Page]
- 4.5.1 Request Type 4-route generation
- Figure 15 – Source / destination designator
- Figure 16 – Simple Type 4-route generation
- Figure 17 – Extended Type 4-route generation [Go to Page]
- 4.5.2 DLroute generation
- Figure 18 – Complex and IP Type 4-route generation
- Figure 19 – Simple DLroute generation
- 4.6 Link-access system
- Figure 20 – Extended DLroute generation
- Figure 21 – Complex and IP DLroute generation
- 4.7 Local variables, counters and queues [Go to Page]
- 4.7.1 V(ACPDU) – acknowledge confirmed PDU
- 4.7.2 V(AUPDU) – acknowledge unconfirmed PDU
- 4.7.3 V(NA) – node-address
- 4.7.4 V(NDLE) – number of DLEs
- 4.7.5 V(PNR) – permitted number of retries
- 4.7.6 V(DC) – device class (simple or normal)
- 4.7.7 V(BR) – bit rate
- 4.7.8 V(MID) – max indication delay
- 4.7.9 V(DMRT) – default max retry time
- 4.7.10 Q(UR) – user request queue
- 4.7.11 C(LAC) – link access counter
- 4.7.12 C(LIC) – link idle counter
- Bibliography [Go to Page]
