Treatment Of Measurement Errors - Siemens SITRANS L Series Operating Instructions Manual

Diagnostics and troubleshooting
10.5 Treatment of measurement errors
Code
Text message
M510
No
communication
with the main
controller
M511
Inconsistent
software
configuration
10.5

Treatment of measurement errors

The tables below give typical examples of application-related measurement errors.
The images in column " Error description" show the actual level as a dashed line
and the output level as a solid line.
1
2
Note
If the output level is constant, the cause could also be the fault setting of the current
output to " Hold value".
If the level is too low, the reason could be a line resistance that is too high
Fault description
Measured value shows a
too low or too high level
Measured value jumps
towards 100 %
38
Cause
Communication between main
electronics and display module
disturbed
A software unit requires a
software update
Real level
Level displayed by the transmitter
Cause
Min./max. adjustment not correct
Incorrect linearization curve
Due to the process, the amplitude
of the level echo sinks
A auto false echo suppression was
not carried out
Rectification
Check the connection cable to
the display
Send transmitter for repair
Carry out software update
Rectification
Adapt min./max. adjustment
Adapt linearization curve
Carry out a auto false echo
suppression
Operating Instructions, 08/2020, A5E49829026
DevSpec
State in CMD 48
Bit 10 of
Byte 14 ... 24
Bit 11 of
Byte 14 ... 24
SITRANS LR120