VEGA VEGACAL 69 Profibus PA User Manual
Page 43
43
10 Supplement
VEGACAL 69 • Profibus PA
31179-EN-130917
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
6
5
4
3
2
1
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. 29: Data format of the measured value
Coding of the status byte associated with the PA output value
Status
code
Description according to
Profibus standard
Possible cause
0x00
bad - non-specific
Flash-Update active
0x04
bad - configuration error
– Adjustment error
– Configuration error with PV-Scale (PV-Span too small)
– Unit irregularity
– Error in the linearization table
0x0C
bad - sensor failure
– Hardware error
– Converter error
– Leakage pulse error
– Trigger error
0x10
bad - sensor failure
– Measured value generation error
0x1f
bad - out of service constant
"Out of Service" mode switched on
0x44
uncertain - last unstable value
Failsafe replacement value (Failsafe-Mode = "Last value" and al-
ready valid measured value since switching on)
0x48
uncertain substitute set
– Switch on simulation
– Failsafe replacement value (Failsafe-Mode = "Fsafe value")
0x4c
uncertain - initial value
Failsafe replacement value (Failsafe-Mode = "Last valid value" and
no valid measured value since switching on)
0x51
uncertain - sensor; conversion
not accurate - low limited
Sensor value < lower limit
0x52
uncertain - sensor; conversion
not accurate - high limited
Sensor value > upper limit
0x80
good (non-cascade) - OK
OK
0x84
good (non-cascade) - active
block alarm
Static revision (FB, TB) changed (10 sec. active, after the parame-
ter of the static category has been written)
0x89
good (non-cascade) - active ad-
visory alarm - low limited
Lo-Alarm
0x8a
good (non-cascade) - active ad-
visory alarm - high limited
Hi-Alarm
0x8d
good (non-cascade) - active crit-
ical alarm - low limited
Lo-Lo-Alarm
0x8e
good (non-cascade) - active crit-
ical alarm - high limited
Hi-Hi-Alarm