Hach-Lange SI792 D, SI792x D, SI792x D-FF, SI792x D-PA User Manual - Manual (Page 56)

Operation—Foundation Fieldbus
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6.2.2.6 Cyclic measured value status
The cyclic measured value status is shown in Table 17 .
6.2.2.7 Measured value limits—limit bits
The respective status bit is set when a condition occurs ( Table 18 ). The
status bit is reset when the condition no longer exists.
Table 17 Cyclic measured value status
Priority Quality Sub-status
Bin-coding
(no limit bits) Hex-
coding
Low
Good
Good Non-Specific 10 00 00 00 0 x 80
Good Active Advisory Alarm 10 00 10 xx 0 x 88
Good Active Critical Alarm 10 00 11 xx 0 x 8C
Uncertain
Uncertain Non-Specific 01 00 00 xx 0 x 40
Last Usable Value (LUV) 01 00 01 xx 0 x 44
Substitute-Set 01 00 10 xx 0 x 48
Initial Value 01 00 11 xx 0 x 4C
Sensor Conversion Not Accurate 01 01 00 xx 0 x 50
Engineering Unit Violation 01 01 01 xx 0 x 54
Sub-Normal 01 01 10 xx 0 x 58
Bad
Non-Specific 00 00 00 xx 0 x 00
Sensor Failure 00 01 00 xx 0 x 10
Device Value 00 00 11 xx 0 x 0C
High Out of Service 00 01 11 xx 0 x 1C
Table 18 Limit bit description
Bin coding of limit bits Description
00 OK
01 Low-limited
10 High-limited
11 Constant