Siemens SITRANS SL - Quality Byte

Interfaces to automation systems
8.1 PROFIBUS DP interface
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
133
8.1.4.2 Quality byte
Meaning of status
A status byte is transmitted synchronously in addition to each of the measured values in the
DS-33 data structure. This byte provides indication of the quality for this value in a "quality
code". Due to this it is henceforth referred to as "quality byte".
The quality byte has the following structure:











EDG
XQFHUWDLQ
JRRG
JRRGFDVFDGHG
2.
ORZOLPLWHG
KLJKOLPLWHG
FRQVWDQW
06%
4XDOLW\ 6XEVWDWXV /LPLWV
2XWSXWYDOXH
6XEVWDWXVLVDOZD\VVHWWR
,QSXWYDOXH
6XEVWDWXVLVQRWHYDOXDWHG
Figure 8-1 Quality byte coding
Note
Error codes and alarm list
For explanation and action of error codes and the alarm list refer to chapter
A
larm, error, and
system messages (Page 163) .