User's Manual

Table Of Contents
68
9 Diagnosis, asset management and service
VEGAPULS 69 • 4 … 20 mA/HART - two-wire
47247-EN-170315
Code
Text message
Reason Removal DevSpec
State in CMD 48
M501
Error in the non-
active linearisation
table
Hardware error EEPROM
Exchanging the electronics
Send instrument for repair
Bit 1 of
Byte 14 … 24
M502
Error in the event
memory
Hardware error EEPROM
Exchanging the electronics
Send instrument for repair
Bit 2 of
Byte 14 … 24
M503
Measurement reli-
ability too low
The echo/noise ratio is too small
for reliable measurement
Antenna dirty or defective
Check installation and process
conditions
Change polarisation direction
Use instrument with higher
sensitivity
Clean the antenna
Bit 3 of
Byte 14 … 24
M504
Error at a device in-
terface
Hardware defect
Check connections
Exchanging the electronics
Send instrument for repair
Bit 4 of
Byte 14 … 24
M505
No echo available
Sensor does not detect an echo
during operation
Antenna dirty or defective
Clean the antenna
Use a more suitable antenna/
sensor
Remove possible false echoes
Optimizesensorpositionand
orientation
Bit 5 of
Byte 14 … 24
M506
Installation/Setup
error
Error during setup
Check or correct installation
and/or parameter settings
Bit 6 of
Byte 14 … 24
M507
Error in the instru-
ment settings
Error during setup
Error when carrying out a reset
False signal suppression faulty
Carry out reset and repeat setup Bit 7 of
Byte 14 … 24
9.4 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
Therstmeasuresare:
Evaluation of fault messages via the adjustment device
Checking the output signal
Treatment of measurement errors
Further comprehensive diagnostics options are available with a PC
with PACTware and the suitable DTM. In many cases, the reasons can
bedeterminedinthiswayandfaultsrectied.
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 eliminate them:
Reaction when malfunc-
tion occurs
Procedure for fault recti-
cation
Check the 4 … 20 mA
signal