1 About communication
Roche Diagnostics
COBAS INTEGRA 400 plus analyzer/Cedex Bio HT Analyzer · Software version 3.6/5.1 · Host Interface Manual · Version 1.24
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Table of contents
About communication 1
Before proceeding to set up the instrument, it is useful to
understand the basics and concepts of the various
communication elements.
In this chapter
1
Communication concept . . . . . . . . . . . . . . . . . . . . . . . . 17
Message structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Block header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Block data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Block check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Communication control . . . . . . . . . . . . . . . . . . . . . . . . . 21
Parity check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Flow control (hardware/software handshake) . . . 22
Sequence counter and block check sum . . . . . . . 22
Check of block and line composition . . . . . . . . . . 23
Receive timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Error handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Host communication handling . . . . . . . . . . . . . . . . . . . 25
Synchronization and sequence counter use. . . . . . . . 26