Diagnosing And Troubleshooting; Communication Troubleshooting; Device Status Icons - Siemens 7ML5431 Operating Instructions Manual

Diagnosing and troubleshooting

10.1

Communication troubleshooting

1. Check the following:
– There is power at the device.
– The LCD shows the relevant data.
– The device can be programmed using the handheld programmer.
– If any fault codes are being displayed see General Fault Codes (Page 169) for a
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 LR250 parame-
ter via remote communications but the
parameter remains unchanged.
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.
10.2

Device status icons

Icon
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
detailed list.
Priority Meaning
Level
1
Maintenance alarm
•
Measurement values are not valid
•
2
Maintenance warning: maintenance demanded immediately
•
Measured signal still valid
•
Corrective action
Ensure Write Protect (6.2.1.) is set to the unlock
•
value.
Ensure Write Protect (6.2.1.) is set to the unlock
•
value, then try setting the parameter via the handheld
programmer.
Ensure Access Control (6.1.1.) is set to Read/ Write.
•
Some parameters can be changed only when the
•
device is not scanning. Try pressing Mode
the device into PROGRAM mode.
10
to put
167