Siemens SITRANS TH100 Operating Instructions Manual page 186

Diagnostics and troubleshooting
11.1 Device status symbols
Display
– NAMUR NE 107
Symbol Device status
Maintenance re‐
quired
Cause:Output signal is still valid, but wear reserve is almost exhausted and/or a function will be limited soon.
Measure:Maintenance is strongly recommended as soon as possible.
Maintenance re‐
quired
Cause: The output signal is still valid. No functional restrictions have been determined but the wear reservice will most likely
be exhausted in the next few weeks.
Measure: Maintenance of device should be planned.
Function test
Cause: Output signal temporarily invalid (e.g. frozen) due to work being performed on the device.
Measure: Manual mode over HMI or disable the engineering system.
Function test
Cause: The output signal does temporarily not reflect the process because the output is based on a simulation value.
Measure: Simulation mode over HMI or disable the engineering system or restart device.
Failure
Cause: The output signal does not represent the process value. The device mode is set to "Out of service".
Measure: Disable "Out of service" and enable normal operation.
Failure
Cause: Output signal invalid due to parameter setting, connection error or configuration error in the HW.
Measure: Check hardware configuration of the device over HMI or engineering system.
Out of specifica‐
tion
Cause: Deviations from permissible ambient or process conditions detected by the device (by means of self-monitoring or
based on warnings/errors in the device) indicate that the measured value is unreliable or that deviations from the set value in
the actuators are most likely greater than anticipated under normal operating conditions.
Process or ambient conditions can damage the device or result in unreliable results.
Measure: Check ambient temperature or process conditions. If possible, install device at different location.
186
NAMUR SIMATIC PDM/PLC
– HCF
Priority * Symbol
4
4
2
2
1
1
(red)
3
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Device status
Maintenance demanded
Maintenance required
Manual operation
Simulation mode
Out of service
Configuration error
Process value alarm
Operating Instructions, 05/2020, A5E41864807-AB
Priority *
2
3
4
5
6
7
8