Operation Troubleshooting - Siemens SITRANS Probe LU Operating Instructions Manual

Code
S:51 * EEPROM corrupt.
S:52 Failsafe is activated. Possible causes: 1)
hardware failure; 2) memory failure; 3)Fault 48;
4) failsafe timer expired– possible causes:
faulty installation, antenna buildup, foaming/
other adverse process conditions, invalid
calibration range.
S:53 * Configuration lost: one or more parameter
settings have been lost. This may occur after
a firmware upgrade causes user parameters
to be reset.

Operation Troubleshooting

Operating symptoms and probable causes.
Symptom
status symbol
flashes
status symbol
does not flash,
and LOE
alternates
with reading
P003 Measurement Response
Refer to
duration of `Waiting' periods.
1.
For details on blanking, see
A5E32337695 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS
Meaning
Meaning
•
•
•
Failsafe timer starts
•
running.
•
•
•
•
The `Waiting' period
has expired.
on page 32, or
Blanking Distance
Corrective Action (cont' d )
Repair required: contact your local
Siemens representative.
For 3) and 4) Correct configuration;
ensure installation is correct; no
antenna buildup; adjust process
conditions to minimize foaming/
other adverse conditions; correct
calibration range. If fault persists,
or for 1) and 2), contact your local
Siemens representative.
Restore user parameters using
SIMATIC PDM.
1
Probable cause
material or object in contact with transducer face
transducer face is too close to the fill point
transducer face is not perpendicular to the liquid
surface
change in level too fast
measurement out of range
foam on liquid surface
high level of vibration in the mounting structure
level inside the blanking zone
P070 Failsafe Timer
on page 89.
on page 42, for
Page 85