VEGA VEGABAR 81 4 … 20 mA_HART - Operating Instructions - Manual (Page 57)

57
9 Diagnosis, asset management and service
VEGABAR 81 • 4 … 20 mA/HART
45018-EN-131010
Code
Text mes-
sage
Cause Rectification
M501
Error in the
non-active
linearization
table
– Index markers are not con-
tinuously rising, for examle
unlogical value pairs
– Check linearization table
– Delete table/Create new
M502
Error in the
event memory
– Hardware error EEPROM – Exchanging the electronics
– Send instrument for repair
M504
Error on an
device inter-
face
– Hardware defect – Check connections
– Exchanging the electronics
– Send instrument for repair
M507
Error in the
instrument
settings
– Error during setup
– Error when carrying out a
reset
– Carry out reset and repeat
setup
9.4 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
The first measures are:
•
Evaluation of fault messages, for example via the display and
adjustment module
•
Checking the output signal
•
Treatment of measurement errors
Further comprehensive diagnostics options offer a PC with the soft-
ware PACTware and the suitable DTM. In many cases, the reasons
can be determined in this way and faults can be rectified.
Connect a multimeter in the suitable measuring range according to
the wiring plan. The following table describes possible errors in the
current signal and helps to remove them:
Error Cause Rectification
4 … 20 mA signal
not stable
– Fluctuations of
the measured
variable
– Set damping according to the
instrument via the display and
adjustment module or PACTware/
DTM
Reaction when malfunc-
tions occur
Procedure for fault recti-
fication
Check the 4 … 20 mA
signal