VEGA VEGACAL 64 Profibus PA - Manual (Page 44)

44
10 Supplement
VEGACAL 64 • Profibus PA
30031-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