VEGA VEGABAR 54 Foundation Fieldbus - climate compensated - Manual (Page 54)

54
10 Supplement
VEGABAR 54 • Foundation Fieldbus - climate compensated
36791-EN-130321
Ʋ External housing IP 65, IP 66/IP 68 (0.2 bar)
Overvoltage category III
Protection class II
10.2 Information on Foundation Fieldbus
Block diagram, measured value processing
The following illustration shows the Transducer Block and Function block in simplified form.
t
i
Simulat
e
ALARMS
Out PV
FIELD-VALUE
Mode & Status PVF-TIME LO
W
-C
UT
O
FF
L-TYP
E
OUT-SCALE PV-SCALE DIRECT
INDIRECT
INDIRECT
SQRT
bar % Lin%
Primary
Value
Secondary
Value 1
Secondary
Value 2
Sensor mounting
correction
AI 2
AI 3
AI 1
TB
Temperature
Sensor_Value
Linearization adjustment
Channel = 1: Primary Value
Channel = 2: Secondary Value 1
Channel = 3: Secondary Value 2
Channel = 4: Temperature
Fig. 25: Transducer Block VEGABAR 54
TB Transducer Block
AI Function Block (AI =Analogue Input)
Diagram, adjustment
The following illustration shows the function of the adjustment:
Secondary_value_2
scale_in_0 scale_in_100 Sensor_value
0 %
100 %
bar
0,500 -0,500
0 % 100 %
scale_in_100 scale_in_0
Fig. 26: Adjustment VEGABAR 54
Parameter list
The following list contains the most important parameters and their meaning:
•
primary_value
– Process Value after min/max-adjustment and linearization. Selected as input to AIFB by setting
'Channel' = 1. Unit derives from 'Primary_value_unit'