SICK LFP Inox - Outputs; Error Behavior

OPERATING INSTRUCTIONS | LFP INOX 8019921/15H0 / 2019-09-30| SICK AG
Irrtümer und Änderungen vorbehalten
51
11TROUBLESHOOTING
11.3 Outputs
Error Cause Solution
Switching output
does not behave as
expected
Conguration incorrect Perform conguration of the switching output
(see “8.2 Conguring the switching outputs”).
An error is pending; the sensor outputs are in the
safe state.
Remove the cause of the error
Cable break Check cable
Analog output does
not behave as
expected
Conguration incorrect Congure the analog output
(see “8.3 Conguring the analog output”).
An error is pending; the sensor outputs are in the
safe state.
Remove the cause of the error
Cable break Check cable
11.4 Error behavior
Error Cause Solution
After installation, the sensor indicates a
high level although the tank is empty.
AutCal not performed Perform commissioning (see “7 Com-
missioning”).
When used with a coaxial tube, the sen-
sor indicates a high level even though
the tank is empty.
AutCal not performed Perform commissioning (see “7 Com-
missioning”).
Level value uctuates on the display Medium surface unsettled Activate ltering (see “7.1 Quick com-
missioning (with factory settings)”).
The displayed level value/SPx/RPx/FHx/
FLx/QALOW/QAHIGH is greater than the
probe length.
An oset was congured for the level
value
Adjust oset (see “8.4.13 Setting the
oset”).
Incorrect probe length congured Adjust probe length (see “8.4.7 Cong-
uring the probe length”).
Level occasionally jumps to a higher
value
Contamination in the vicinity of the
process connection
Clean
Spray ball or feed wetting probe with
medium above the medium surface
Observe the installation conditions
Congure the MaxCoL plausibility lter
(see “8.4.2 Filtering measured values”).
Change in the ambient conditions with
respect to the situation during the Aut-
Cal process
Perform commissioning again
(see “7 Commissioning”).
Signicant buildup of foam Perform foam commissioning
(see “7.3 Foam commissioning (with
factory settings)”).
TrsHld set too low, echo algorithm de-
tecting interference reections
Increase TrsHld
Level occasionally jumps to 0 mm TrsHld set too high Perform advanced commissioning
(see “7 Commissioning”).
Signicant buildup of foam Perform foam commissioning
No measurement of low levels for media
with low DK values
Increased inactive range at the end of
the probe for media with a low DK
Increased measurement inaccuracy Use of foam algorithm