Vega VEGABAR 51 Operating Instructions Manual page 66
Pressure transmitter, profibus pa
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Also See for VEGABAR 51:
- Product information (32 pages) ,
- Operating instructions manual (80 pages)
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The measured value is transferred as a 32 bit floating point number in the IEEE-754 format.
Byte n
Bit
Bit
Bit
Bit
Bit
Bit
Bit
7
4
6
5
3
2
1
4
7
6
2
5
3
VZ
2
2
2
2
2
Sign
Exponent
Bit
VZ
(Exponent - 127)
2
Value = (-1)
Fig. 32: Data format of the measured value
Coding of the status byte associated with the PA output value
Status
Description according to Pro-
code
fibus standard
0x00
bad - non-specific
0x04
bad - configuration error
0x0C
bad - sensor failure
0x10
bad - sensor failure
0 x 1f
bad - out of service constant
0 x 44
uncertain - last unstable value
0 x 48
uncertain substitute set
0 x 4c
uncertain - initial value
0 x 51
uncertain - sensor; conversion
not accurate - low limited
0 x 52
uncertain - sensor; conversion
not accurate - high limited
0 x 80
good (non-cascade) - OK
0 x 84
good (non-cascade) - active
block alarm
0 x 89
good (non-cascade) - active ad-
visory alarm - low limited
66
Byte n+1
Bit
Bit
Bit
Bit
Bit
Bit
Bit
0
4
7
6
5
3
2
-3
2
2
1
0
-1
-2
-4
2
2
2
2
2
2
Significant
(1 + Significant)
Possible cause
Flash-Update active
l Adjustment error
l Configuration error with PV-Scale (PV-Span too small)
l Unit irregularity
l Error in the linearization table
l Hardware error
l Converter error
l Leakage pulse error
l Trigger error
l Measured value generation error
l Temperature measurement error
"Out of Service" mode switched on
Failsafe replacement value (Failsafe-Mode = "Last value" and
already valid measured value since switching on)
l Switch on simulation
l Failsafe replacement value (Failsafe-Mode = "Fsafe value")
Failsafe replacement value (Failsafe-Mode = "Last valid value" and
no valid measured value since switching on)
Sensor value < lower limit
Sensor value > upper limit
OK
Static revision (FB, TB) changed (10 sec. active, after the parameter
of the static category was written)
Lo-Alarm
Byte n+2
Bit
Bit
Bit
Bit
Bit
Bit
Bit
4
7
6
5
3
0
1
-9
-10 -11 -12 -13 -14 -15 -16 -17
2
-8
2
2
2
2
-5
-6
-7
2
2
Significant
Byte n+3
Bit
Bit
Bit
Bit
Bit
Bit
Bit
0
2
1
7
6
5
4
-18 -19 -20 -21 -22 -23
2
2
2
2
2
2
2
Significant
VEGABAR 51 • Profibus PA
Bit
Bit
Bit
Bit
3
2
1
0
2
2
2
2
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