BS 6556-3:1985
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Low speed digital signals for use in coal mines Specification for message protocols
Hardcopy , PDF
English
31-01-1985
22-05-2026
Foreword
Committees responsible
Specification
0 Introduction
1 Scope
2 Definitions and abbreviations
3 Link configurations
4 Transmissions
5 Checks
6 Data only protocol (DOP)
7 Simple asynchronous protocol (SAP)
8 Marking
Appendix
A Method for the generation and verification of check
field (CF)
Tables
1 Start of message (SMB) codes
2 Valid address bytes
3 Stuffing codes
Figures
1 The components of the byte transmission
2 Operation using DOP
3 Operation for 1 to 15 slaves using SAP
4 Application data message (ADM) and broadcast message
(BRO) format
5 Link control message (LCM) and initialization
message (IM) format
6 A 2 byte transmission
7 Transmission envelope from slave with modem
8 Slave response to poll (current loop link)
9 Slave response to poll (MODEM link)
10 Composition of message address byte (AB)
11 Composition of application data description byte
(ADD)
Specifies the message protocols employed with intrinsicaly safe transmitting and receiving circuits forming low speed digital data transmission links in which the data is transmitted by optical or transformer couplings.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes 82/76936 DC and 88/70378 DC (09/2005) Reviewed and confirmed by BSI, January 2011. (12/2010)
|
| DocumentType |
Standard
|
| Pages |
26
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
Withdrawn:This standard is no longer used
| BS 6556-2:1985 | Low speed digital signals for use in coal mines Specification for transformer coupling |
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| BS 6556-1:1985 | Low speed digital signals for use in coal mines. Specification for optical coupling |
| BS EN 322:1993 | Wood-based panels. Determination of moisture content |
| BS 6556-1:1985 | Low speed digital signals for use in coal mines. Specification for optical coupling |
| BS 5754:1980 | Specification for electrical analogue and state signals for use in coal mines |
| BS 6556-2:1985 | Low speed digital signals for use in coal mines Specification for transformer coupling |
| BS 5397(1984) : LATEST |
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