WIKA IPT-11, Operating Instructions Manual

Page: 36 / 56

8 M aintenance and fault recti fi cation
8 . 1 M aintenance , cleaning
W hen used in the correct way , no special maintenance is required in
normal operation .
I n some applications , product buildup on the sensor diaphragm can
in fl uence the measuring result
. D
epending on the sensor and
application , take precautions to ensure that heavy buildup , and
especially a hardening thereof , is avoided .
I f necessary , the transmitter has to be cleaned . I n this case , make sure
that the materials are resistant against the cleaning detergents .
8
.
2
R
emove interferences
T he operator of the system is responsible for taken suitable measures
to remove interferences .
A maximum of reliability is ensured . N evertheless , faults can occur
during operation . T hese may be caused by the following , e . g .:
l
S ensor
l
P rocess
l
P ower supply
l
S ignal processing
T he fi rst measures to be taken are to check the output signals as well
as to evaluate the error messages via the indicating and adjustment
module
. T he procedure is described below . F urther comprehensive
diagnostics can be carried out on a PC with the software PACT ware
and the suitable DTM . I n many cases , the causes can be determined
in this way and faults can be recti fi ed .
?
W hen an additional instrument is connected , the segment fails .
l
M ax . supply current of the segment coupler exceeded
à M easure the current consumption , reduce size of segment
?
W rong presentation of the measured value in S imatic S
5
l
S imatic S
5
cannot interpret the number format IEEE of the
measured value
à I nsert converting component from S iemens
?
I n S imatic S
7
the measured value is always presented as
0
l
O nly four bytes are consistently loaded in the PLC
à U se function component SFC
14
to load
5
bytes consistently
R eaction when malfunc -
tions occur
C auses of malfunction
F ault recti fi cation
C hecking P ro fi bus PA
36
P
rocess pressure transmitter
IPT -
11
V
ers
.
4
.
0
-
ceramic sensor
• P
ro fi bus
PA
8
M
aintenance and fault recti fi cation
31547
-
EN
-
081211