Communication Troubleshooting - Siemens SITRANS LR560 Operating Instructions Manual

Symptom Cause
Reads correctly but
•
occasionally reads
•
high when vessel is
not full
•
Level reading lower
•
than material level
•
10.4

Communication troubleshooting

1. Check the following:
– There is power at the instrument.
– The local display shows the relevant data.
– The device can be programmed using the handheld programmer.
– If any fault codes are being displayed see Fault codes (Page 156) for a detailed list.
2. Verify that the wiring connections are correct.
3. See the table below for specific symptoms.
Symptom
The device cannot be programmed via the
handheld programmer.
You try to set a SITRANS LR560 parame-
ter via remote communications but the
parameter remains unchanged.
If you continue to experience problems, go to our website (www.siemens.com/LR560) and check
the FAQs for SITRANS LR560, or contact your Siemens representative.
SITRANS LR560 (mA/HART)
Operating Instructions, 06/2017, A5E34647946-AD
detecting close range echo
build up near top of vessel or
nozzle
nozzle problem
material is within Near Range
zone
multiple echoes processed
10.4 Communication troubleshooting
Action
Use the air purge feature to clean the antenna
•
use AUTO FALSE ECHO SUPPRESSION (2.8.1)
•
(Page 126) and AUTO FALSE ECHO SUPPRESSION
RANGE (2.8.2) (Page 127).
decrease NEAR RANGE (2.7.1.) (Page 121) (minimum
•
value depends on antenna type)
raise SITRANS LR560
•
ensure ALGORITHM (2.7.3.1) (Page 122) is set to TF
•
(First echo)
Corrective action
Ensure Write Protect (6.1.) is set to the unlock value.
•
Ensure Write Protect (6.1.) is set to the unlock value,
•
then try setting the parameter via the handheld pro-
grammer.
Some parameters can be changed only when the
•
device is not scanning. Try pressing Mode
the device into PROGRAM mode.
Diagnosing and troubleshooting
to put
161