KROHNE H250 M9 PROFIBUS PA EN - Manual (Page 8)

8 Supplement to Installation and Operating Instructions H 250/ESK3-PA
Test the first two bits (quality) to identify the quality of the measured value:
Good (non Cascade)
Measured value is ok and can be used.
Uncertain The measured value can be used, but its accuracy is not assured
(e.g. measured value frozen or A/D converter is outside the valid
range).
Bad Measured value is not acceptable and should not be used for further
processing.
Good (Cascade) is not supported since not applicable to meters.
Diagnostics
If the device-internal diagnostic functions identily an error, additional diagnostic information
is transmitted into the master. This information is explained in the GSD file under
UNIT_DIAG_BIT(i).