Diagnostics and troubleshooting
11
11.1 Device status symbols
De
vice status is shown using symbols on the local display. Additionally, the symbol and
respective text message for each device status can be seen in remote engineering,asset
management or process control systems.
Locally, alarms are shown as a symbol in the lower line of the display. If several diagnostic
states are active at the same time, the symbol for the most critical state is shown.
Device status characteristics
The following table provides possible cause of device status and actions for the user or
service.
The symbols used on the local display are based on NAMUR status signals, whereas symbols
used in SIMATIC PDM are based on Siemens standard alarm classes.
Note
De
vice status priority conict - Namur vs Siemens standard
When more than one diagnostic event is active simultaneously, a conict in priorities may arise.
In this case, the Namur symbol on the local display will dier from that shown in SIMATIC PDM.
• For example: if both diagnostic states "Maintenance demanded" and "Conguration error"
are active,
– Local display (using Namur symbols) will show "Conguration error" as higher priority.
– SIMATIC PDM (using Siemens standard symbols) will show "Maintenance demanded" as
higher priority.
Be aware of the priority for each device status, depending on the interface used.
11.2 Communication troubleshooting
Note
U
nderstanding radar technologies
• Many parameters referenced and techniques described here require a good understanding
of radar technologies and Siemens echo processing software. Use this information with
caution.
• If setup becomes too confusing, perform a device reset and start again.
• As a further resource, "Understanding Radar Level Measurement" is available on our website.
Go to:
www.siemens.com/level (
www.siemens.com/level)
Select "T
raining center > E-Learning > epubs".
SITRANS LR500 series with mA/HART
Operating Instructions, 03/2024, A5E51099898-AA 155
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