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    I.S. EN 60870-5-2:1994

    Current The latest, up-to-date edition.

    TELECONTROL EQUIPMENT AND SYSTEMS - PART 5: TRANSMISSION PROTOCOLS - SECTION 2: LINK TRANSMISSION PROCEDURES

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-1994

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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    Table of Contents - (Show below) - (Hide below)

    Committees responsible
    National foreword
    Specification
    Introduction
    1. Scope and object
    1.1 Scope
    1.2 Object
    2. Normative references
    3. Formats and structures of standard transmission
           frames
    3.1 Format FT 1.1
    3.2 Format FT 1.2
    3.3 Format FT 2
    3.4 Format FT 3
    4. Selection primitives and elements of transmission
           procedures
    4.1 SEND/NO REPLY service
    4.1.1 Service procedure
    4.1.2 Transmission procedure
    4.2 SEND/CONFIRM service
    4.2.1 Service primitives
    4.2.2 Transmission procedure
    4.3 REQUEST/RESPOND service
    4.3.1 Service primitives
    4.3.2 Transmission procedures
    5. Unbalanced transmission
    5.1 Specification of length, control and address fields
    5.1.1 Length field
    5.1.2 Control field
    5.1.3 Address field
    5.2 Unbalanced transmission services
    5.3 Unbalanced transmission procedures
    5.3.1 SEND/NO procedures
    5.3.2 Undisturbed SEND/CONFIRM procedures
    5.3.3 Disturbed SEND/CONFIRM procedures
    5.3.4 Undisturbed REQUEST/RESPOND procedures
    5.3.5 Disturbed REQUEST/RESPOND procedures
    6. Balanced transmission
    6.1 Specification of length, control and address fields
    6.1.1 Length field
    6.1.2 Control field
    6.1.3 Address field
    6.2 Balanced transmission services
    6.3 Balanced transmission procedures
    6.3.1 SEND/NO REPLY procedures
    6.3.2 Undisturbed SEND/CONFIRM procedures
    6.3.3 Undisturbed procedures with data flow control
    6.3.4 Disturbed SEND/CONFIRM procedures
    Annex
    A. Time out interval for repeated frame transmission
    Tables
    1. Unbalanced transmission, function codes of control
         field in messages sent from primary (PRM = 1)
    2. Unbalanced transmission, function codes of control
         field in messages sent from secondary (PRM = 0)
    3. Balanced transmission, function codes of control
         field in messages sent from primary (PRM = 1)
    4. Balanced transmission, function codes of control
         field in messages sent from secondary (PRM = 0)
    Figures
    1. Relationship between service primitives and
         transmission procedures for basic link services
    2. Example of the interaction between a polling
         procedure and an event-initiated transmission
    3. Unbalanced transmission procedures, undisturbed
         SEND/CONFIRM procedures
    4. Unbalanced transmission procedures, disturbed SEND/
         CONFIRM procedure
    5. Unbalanced transmission procedures, undisturbed
         REQUEST/RESPOND procedures
    6. Unbalanced transmission procedures, undisturbed
         REQUEST/RESPOND procedures
    7. Unbalanced transmission procedures, undisturbed
         REQUEST/RESPOND procedures
    8. Unbalanced REQUEST/RESPOND transmission procedures,
         disturbed REQUEST frame
    9. Unbalanced REQUEST/RESPOND transmission procedures,
         disturbed RESPOND frame
    10. Example of the interaction of service primitives and
         transmission procedures in a balanced system
    11. Balanced transmission procedures, undisturbed SEND/
         CONFIRM procedures
    12. Balanced transmission procedures, data flow control
    13. Balanced transmission procedures, disturbed SEND
         frame
    14. Balanced transmission procedures, disturbed SEND and
         ignored CONFIRM frame
    15. Balanced transmission procedures, disturbed CONFIRM
         frame
    16. Balanced transmission procedures, disturbed channel
         in one direction
    A.1 Unbalanced transmission procedures, disturbed
         primary frame
    A.2 Unbalanced transmission procedures, disturbed
         secondary frame
    A.3 Balanced transmission procedures, disturbed primary
         frame
    A.4 Balanced transmission procedures, disturbed
         secondary frame

    Abstract - (Show below) - (Hide below)

    Applies to telecontrol equipment and systems with coded bit serial data transmission for monitoring and controlling geographically widespread processes.

    General Product Information - (Show below) - (Hide below)

    Development Note For CENELEC adoptions of IEC publications, please check www.iec.ch to be sure that you have any corrigenda that may apply. (01/2017)
    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Current
    View more information

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