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21
UK
11 Fault correction
In case of faults or anomalies:
►
Connect the unit to a PC and read [Fnr] via the IO-Link interface�
►
Read [Fnr]�
Fnr Type of fault
Corrective measures
0
No fault, no anomaly occurred�
-/-
20
Internal malfunction in the sensor
electronics�
►
Replace the unit�
21
Backup function of the sensor activated,
e�g� a sensor element has failed
(diagnostic case 4
►
Replace the unit�
►
Continue measurement with only one
sensor element (backup function):
-In 2-wire operation set [drEd] = ON so
that the measured temperature value
can be continued to be transferred�
Then the analogue output only
provides diagnostic cases of the
category "failure"�
-In 3-wire operation all diagnostic
cases can be signalled via the
diagnostic switching output except
those used for drift monitoring
)�
30
Wiring fault
►
Check wiring�
42
Analogue signal 21�5 mA (FOU2 = On)
or 3�5 mA (FOU2 = OFF)
> The switch point is clearly outside
the measuring range�
►
Check measuring range�
►
Adapt [ASP] value and [AEP] vaule to
the operating conditions�
71
Detected sensor drift exceeds warning
level [drW]
First indication of drift detected�
►
Check whether the parameter [drW]
is programmed correctly�
►
Prepare replacement of the unit�
72
Detected sensor drift exceeds alarm
level [drA]
Drift exceeds alarm threshold�
Temperature measurement with reduced
accuracy possible�
►
Check whether the parameter [drA] is
programmed correctly�
►
Replace the unit�