Vega VEGAPULS 64 - 9.4 Rectify faults; 4... 20 mA signal errors

64
9 Diagnosis, asset management and service
VEGAPULS 64 • Two-wire 4 … 20 mA/HART
51141-EN-210219
Code
Text message
Cause Rectication DevSpec
State in CMD 48
M504
Error at a device in-
terface
Hardware defect Check connections
Exchanging the electronics
Send instrument for repair
Byte 24, 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ori-
entation
Byte 24, Bit 5 of
Byte 14 … 24
M506
Installation/Setup
error
Error during setup Check or correct installation and/
or parameter settings
Byte 24, 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 Byte 24, 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
•
Checking the output signal
•
Treatment of measurement errors
A smartphone/tablet with the adjustment app or a PC/notebook with
thesoftwarePACTwareandthesuitableDTMoeryoufurthercom-
prehensive diagnostic possibilities. In many cases, the causes can be
determined in this way and the faults eliminated.
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:
Error Cause Rectication
4 … 20 mA signal not stable Fluctuating measured value Set damping
4 … 20 mA signal missing Electrical connection faulty Check connection, correct, if necessary
Voltage supply missing Check cables for breaks; repair if nec-
essary
Operating voltage too low, load resist-
ance too high
Check, adapt if necessary
Current signal greater than
22 mA, less than 3.6 mA
Sensor electronics defective Replace device or send in for repair de-
pending on device version
Reaction when malfunc-
tion occurs
Faultrectication
4 … 20 mA signal