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
Hardcopy , PDF
English
01-01-1994
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.
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
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