Vega VEGAFLEX 86 - Page 90

90
11 Supplement
VEGAFLEX 86 • Probus PA
44232-EN-160518
The measured value is transferred as a 32 bit oating point number in the IEEE-754 format.
Byte n
Byte n+1
Bit
7
VZ
Exponent
Bit
6
2
Bit
5
2
Bit
4
2
Bit
3
2
Bit
2
2
Bit
1
2
Bit
0
2
Bit
7
2
Bit
6
2
Bit
5
2
Bit
4
2
Bit
3
2
Bit
2
2
Bit
1
2
Bit
0
2
Sign
Bit
Significant
7
65
4
3
21
0
-1
-2
-3
-4
-5
-6 -7
Byte n+2
Byte n+3
Bit
7
2
Significant
Bit
6
2
Bit
5
2
Bit
4
2
Bit
3
2
Bit
2
2
Bit
1
2
Bit
0
2
Bit
7
2
Bit
6
2
Bit
5
2
Bit
4
2
Bit
3
2
Bit
2
2
Bit
1
2
Bit
0
2
Significant
-9
-10 -11
-12
-13
-14 -15
-16
-17
-18
-19
-20
-21
-22
-23
-8
Value = (-1)
VZ
2
(Exponent - 127)
(1 + Significant)
Fig. 65: Data format of the measured value
Coding of the status byte associated with the PA output value
You can nd further information for the coding of the status byte in the Device Description 3.02 on
www.probus.com.
Status code Description according to
Probusstandard
Possible cause
0 x 00 bad - non-specic Flash-Update active
0 x 04 bad - conguration error – Adjustment error
– Conguration error with PV-Scale (PV-Span too
small)
– Unit irregularity
– Error in the linearization table
0 x 0C bad - sensor failure – Hardware error
– Converter error
– Leakage pulse error
– Trigger error
0 x 10 bad - sensor failure – Measured value generation error
– Temperature measurement error
0 x 1f bad - out of service con-
stant
"Out of Service" mode switched on
0 x 44 uncertain - last unstable
value
Failsafe replacement value (Failsafe-Mode = "Last val-
ue" and already valid measured value since switching
on)
0 x 48 uncertain substitute set – Switch on simulation
– Failsafe replacement value (Failsafe-Mode = "Fsafe
value")
0 x 4c uncertain - initial value Failsafe replacement value (Failsafe-Mode = "Last valid
value" and no valid measured value since switching on)
0 x 51 uncertain - sensor; con-
version not accurate - low
limited
Sensor value < lower limit
0 x 52 uncertain - sensor; con-
version not accurate - high
limited
Sensor value > upper limit
0 x 80 good (non-cascade) - OK OK
0 x 84 good (non-cascade) - ac-
tive block alarm
Static revision (FB, TB) changed (10 sec. active, after
the parameter of the static category has been written)