VEGA VEGAFLEX 66 (-110…+400°C) Profibus PA - Manual (Page 58)

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 Pro-
fibus standard Possible cause
0x00 bad - non-specific Flash-Update active
0x04 bad - configuration error
l
Adjustment error
l
Configuration error with PV-Scale (PV-Span too
small)
l
Unit irregularity
l
Error in the linearization table
0x0C bad - sensor failure
l
Hardware error
l
Converter error
l
Leakage pulse error
l
Trigger error
0x10 bad - sensor failure
l
Measured value generation error
0x1f bad - out of service constant "O ut of Service" mode switched on
0x44 uncertain - last unstable value Failsafe replacement value (Failsafe-Mode = "Last value" and
already valid measured value since switching on)
0x48 uncertain substitute set
l
Switch on simulation
l
Failsafe replacement value (Failsafe-Mode =
"F
safe 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 parameter
of the static category was written)
0x89 good (non-cascade) - active ad-
visory alarm - low limited Lo-Alarm
58 VEGAFLEX 66 • Profibus PA
10 Supplement
32764
-EN
-080716