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SITRANS LR250 with FOUNDATION FIELDBUS
170
Operating Instructions, 09/2021, A5E32221411-AH
Diagnosing and troubleshooting
10
1.
Check the following:
–
There is power at the device.
–
The LCD shows the relevant data.
–
If any fault codes are being displayed see General Fault Codes (Page 172) for a detailed
list.
2.
Verify that the wiring connections are correct.
3.
See the table below for specific symptoms.
Symptom
Corrective action
The device cannot be programmed
via FF.
•
Make sure
Remote Lockout (6.1.1.)
is set to the un-
lock value
•
Ensure block is Out of Service
You try to set a SITRANS LR250 parameter
via remote communications but the pa-
rameter remains unchanged.
•
Ensure
Remote Lockout (6.1.1.)
is disabled.
•
Ensure
Write Protection (6.2.1.)
is set to the unlock
value.
•
Ensure block is Out of Service
The AIFB output equals the display value
but does not correspond to actual material
level.
•
Ensure the Channel selection and Scaling in AIFB 1
are correctly entered
•
Ensure AIFBs are scheduled and in Auto mode
•
Ensure High Calibration Point is correctly entered
•
View the echo profile to see if the wrong echo is be-
ing selected. If so, see Operation Troubleshooting
(Page 176) for possible causes and corrective action
The AIFB output is not equal
to the displayed value (regardless of actual
material level).
•
Confirm you are looking at the AIFB Output
•
Ensure AIFBs are scheduled and in Auto mode
•
Ensure scaling has not been programmed into the
controller: all scaling should be performed by the
LR250
•
Check the network to ensure the controller is com-
municating with the LR250
Not able to change parameters via LUI.
•
Ensure
Local Operation (6.2.3.)
is enabled
Not able to change parameters,
such as low calibration point.
•
Ensure block is in Out of Service mode
If you continue to experience problems go to our website and check the FAQs for SITRANS
LR250:
Product page (
), or contact your Siemens representative.
Содержание SITRANS L
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