v
TABLE OF CONTENTS
SECTION 1. OVERVIEW............................................................................................................................. 1
SECTION 2. TRANSPORT FRAME FORMAT ........................................................................................... 3
COMMON FRAME FORMAT DEFINITION.............................................................................................. 3
FRAME HEADER ..................................................................................................................................... 3
Node Addresses ................................................................................................................................... 3
Protocol Control Byte............................................................................................................................ 4
Length................................................................................................................................................... 4
Header EDC ......................................................................................................................................... 4
DATA FIELD ............................................................................................................................................. 5
FRAME EDC............................................................................................................................................. 5
SECTION 3. TRANSPORT FRAME TYPES ............................................................................................... 7
I-FRAMES................................................................................................................................................. 7
PCB of I-frames .................................................................................................................................... 7
Data Field ............................................................................................................................................. 8
R-FRAMES ............................................................................................................................................... 9
PCB of R-frames .................................................................................................................................. 9
S-FRAMES ............................................................................................................................................. 11
PCB of S-frames................................................................................................................................. 11
Data field of S-frames......................................................................................................................... 12
Resynchronize Protocol Command.................................................................................................... 13
Reset Device Command..................................................................................................................... 14
Get Communication Parameters Command ...................................................................................... 15
Set Communication Parameters Command....................................................................................... 17
Frame Reject Command .................................................................................................................... 18
Baud Synchronization Command....................................................................................................... 19
Echo Command.................................................................................................................................. 20
SECTION 4. PROTOCOL.......................................................................................................................... 23
PARAMETERS ....................................................................................................................................... 23
TIMEOUTS ............................................................................................................................................. 23
Character Wait Timeout (CWT) .......................................................................................................... 23
Block Wait Timeout (BWT) ................................................................................................................. 23
R-frame to I-frame Delay .................................................................................................................... 24
GENERAL NOTATION ........................................................................................................................... 24
GENERAL PROCEDURES .................................................................................................................... 25
ERROR HANDLING ............................................................................................................................... 25
RESYNCHRONIZATION ........................................................................................................................ 26
RULES .................................................................................................................................................... 27
Service Requests ............................................................................................................................... 27
Baud Synchronization......................................................................................................................... 27
Establishing and Resetting a Connection........................................................................................... 28
Data Transfer...................................................................................................................................... 29
Error Recovery ................................................................................................................................... 30
Service Indications ............................................................................................................................. 31
SCENARIOS........................................................................................................................................... 33
Scenario Notations ............................................................................................................................. 33
Service Requests ............................................................................................................................... 33
Baud Synchronization......................................................................................................................... 34
Establishing and Resetting a Connection........................................................................................... 34
Data Transfer...................................................................................................................................... 35
