Vega VEGAPULS 63 - 9 Fault Rectification Procedures; Malfunction Reaction & Liquid Measurement Errors

66
9 Diagnosis, asset management and service
VEGAPULS 63 • Modbus and Levelmaster protocol
41364-EN-170711
Code
Text message
Reason Rectication DevSpec
State in CMD 48
M503
Measurement reli-
ability too low
•
The echo/noise ratio is too small
for reliable measurement
•
Check installation and process
conditions
•
Clean the antenna
•
Change polarisation direction
•
Use instrument with higher
sensitivity
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
•
Level echo can no longer be
detected
•
Clean the antenna
•
Use a more suitable antenna/
sensor
•
Remove possible false echoes
•
Optimizesensorpositionand
orientation
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.
The below tables show typical examples of application-related meas-
urementerrorswithliquids.Themeasurementerrorsaredierentiated
according to the following:
•
Constant level
•
Filling
•
Emptying
The images in column "Error pattern" show the real level as a broken
line and the level displayed by the sensor as a continuous line.
1
2
Level
time
0
1 Real level
2 Level displayed by the sensor
Reaction when malfunc-
tion occurs
Procedure for fault recti-
cation
Treatment of measure-
ment errors with liquids