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11 Diagnostics and servicing
VEGAPULS 21 • Two-wire 4 … 20 mA/HART
58351-EN-191014
Code
Text message
Cause
Rectification
DevSpec
State in CMD 48
S601
Overfilling
Danger of vessel overfilling
Make sure that there is no fur-
ther filling
Check level in the vessel
Byte 23, Bit 5 of
Byte 14 … 24
S603
Impermissible oper-
ating voltage
Terminal voltage too small
Check terminal voltage, increase
operating voltage
Byte 23, Bit 6 of
Byte 14 … 24
Code
Text message
Cause
Rectification
DevSpec
State in CMD 48
M500
Error during the re-
set "delivery status"
The data could not be restored
during the reset to delivery status
Repeat reset
Load XML file with sensor data in
-
to the sensor
Bit 0 of
Byte 14 … 24
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 sen-
sitivity
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 ori-
entation
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
Maintenance
