Siemens SITRANS L Operating Instructions Manual page 170

Diagnosing and troubleshooting
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
2. Verify that the wiring connections are correct.
3. See the table below for specific symptoms.
Symptom
The device cannot be programmed
via FF.
You try to set a SITRANS LR250 parameter
via remote communications but the pa-
rameter remains unchanged.
The AIFB output equals the display value
but does not correspond to actual material
level.
The AIFB output is not equal
to the displayed value (regardless of actual
material level).
Not able to change parameters via LUI.
Not able to change parameters,
such as low calibration point.
If you continue to experience problems go to our website and check the FAQs for SITRANS
LR250:
Product page (http://www.siemens.com/LR250), or contact your Siemens representative.
170
list.
Corrective action
Make sure Remote Lockout (6.1.1.) is set to the un-
•
lock value
• Ensure block is Out of Service
• 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
• 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
• 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
Ensure Local Operation (6.2.3.) is enabled
•
• Ensure block is in Out of Service mode
SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH
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