VEGA VEGABAR 67 Foundation Fieldbus - Manual (Page 45)

45
8 Maintenance and fault rectification
VEGABAR 67 • Foundation Fieldbus
36744-EN-130321
Error Cause Rectification
When an addition-
al instrument is
connected, the H1
segment fails.
Max. supply
current of the seg-
ment coupler
exceeded
Measure the current consumption, re-
duce size of segment
Measured val-
ue on the display
and adjustment
module does not
correspond to the
value in the PLC
The menu item
"Display - Display
value" is not set to
"AI-Out"
Check values and correct, if neces-
sary
Instrument does
not appear during
connection setup
Profibus DP cable
pole-reversed
Check cable and correct, if necessary
Incorrect termi-
nation
Check termination at the beginning
and end points of the bus and termi-
nate, if necessary, according to the
specification
Instrument not
connected to the
segment
Check and correct, if necessary
In Ex applications, the regulations for the wiring of intrinsically safe
circuits must be observed.
Error code Cause Rectification
E013 no measured value
available 10)
– Exchange the instrument or send it
in for repair
E017 Adjustment span too
small
– repeat with modified values
E036 no operable sensor
software
– Carry out a software update or send
instrument for repair
E041 Hardware error, elec-
tronics defective
– Exchange the instrument or send it
in for repair
E113 Communication con-
flict
– Exchange the instrument or send it
in for repair
8.3 Calculation of total deviation (according to
DIN 16086)
The total deviation F
total
according to DIN 16086 is the sum of basic
accuracy F
perf
and longterm stability F
stab
. F
total
is also called maximum
practical deviation or utility error.
F
total
= F
perf
+ F
stab
F
perf
= √((F
T
) 2 + (F
Kl
) 2 )
With the analogue signal output there is also the error of the current
output F
a
.
F
perf
= √((F
T
) 2 + (F
Kl
) 2 (+ F
a
) 2 )
With:
Error messages via the
display and adjustment
module
Total deviation
10) Fault message can also appear if the pressure is higher than the nominal
range.