Hardware Manual COMBILOG 1020
120
For data transmission via PROFIBUS following telegram formats
are relevant for the datalogger
COMBILOG 1020
:
Formats with fixed information section length without data
field:
SD1
FCS
DA
SA
FC
ED
Formats with variable information section length with data
field:
SD2
LE
DataUnit
FCS
LEr
DA
SA
FC
ED
SD2
Formats with fixed information section length with data field:
SD3
DataUnit
FCS
DA
SA
FC
ED
With PROFIBUS the various telegram formats are differentiated
by varying Start-Delimiters (SD). They can also be called SD1-,
SD2- or SD3-telegrams in this context. The telegram formats are
valid both for request and response telegrams. However, a re-
quest telegram does not necessarily have to be followed by a re-
sponse telegram of the same format. In addition to that there is a
telegram which consists of one character only and which is used
as either positive or negative acknowledgement, according to the
kind of request.
Short Acknowledgement
SC
Summary of Contents for COMBILOG 1020
Page 1: ...COMBILOG 1020 Datalogger Hardware Manual Version 3 09...
Page 2: ...Hardware Manual COMBILOG 1020 2 Issue 03 11 2005 Technical data are subject to change...
Page 4: ...Hardware Manual COMBILOG 1020 4...
Page 6: ...Hardware Manual COMBILOG 1020 6...
Page 12: ...Hardware Manual COMBILOG 1020 12...
Page 86: ...Hardware Manual COMBILOG 1020 86 Bild 8 1 Example Master Slave System...
Page 169: ...Hardware Manual COMBILOG 1020 169...
Page 170: ...Hardware Manual COMBILOG 1020 170...