Using PlantWeb Alerts
December 2009
C-9
Table C-3. Using PlantWeb Alerts (Continued)
PlantWeb Alert
(Group)
(Default Alert Category
Alert Condition
and (Default))
What the Alert is
Detecting
Effect on Valve /
Instrument
Recommended
Action
Help
Travel Sensor
(Sensors)
(Failed)
Travel Sensor
(Enabled)
The travel feedback is within
acceptable limits.
If configured for Self Test
Shutdown, then the
transducer “Actual” mode is
placed Out of Service until the
problem is fixed. Out of
service results in the actuator
being at the Zero Power
Condition.
Check mounting
and linkage
Travel feedback value
is outside expected
limits. If this problem
occurs during
instrument set-up, the
most likely cause is
faulty mounting or
improper adjustment of
the travel sensor. If
this problem occurs
during normal
operation, the most
likely cause is a failure
of the travel sensor or
damaged linkage.
To correct,
1) Insure proper
mounting and linkage
adjustment.
2) Inspect and test
travel sensor
3) Toggle the
transducer target
mode.
If the problem persists,
replace the printed
wiring board (PWB)
assembly.
Output Press Sensor
(Sensors)
(Maintenance)
Port A Pressure
Sensor (Enabled)
The pressure sensor reading
is outside the functional range
of the sensor.
If configured for Self Test
Shutdown, then the
transducer “Actual” mode is
placed Out of Service until the
problem is fixed. Out of
service results in the actuator
being at the “No Power”
condition.
Confirm proper
air supply
The pressure sensor
on-board the device
has failed. This may
be due to excessive
supply pressure or
contaminated air.
If it is verified that the
air supply is ok,
replace the printed
wiring board (PWB)
assembly.
Port B Pressure
Sensor (Enabled)
None − Indicates a possible
hardware problem that would
degrade diagnostic capability.
Supply Press Sensor
(Sensors)
(Advisory)
Supply Press
Sensor (Enabled)
The pressure sensor reading
is outside the functional range
of the sensor.
None − Indicates a possible
hardware problem that would
degrade diagnostic capability.
Confirm proper
air supply
The pressure sensor
on-board the device
has failed. This may
be due to excessive
supply pressure or
contaminated air.
If it is verified that the
air supply is ok,
replace the printed
wiring board (PWB)
assembly.
Temperature Sensor
(Sensors)
(Advisory)
Temperature
Sensor (Enabled)
The temperature sensor
reading is outside the
functional range of the sensor.
None − Indicates a possible
hardware problem that would
degrade instrument calibration
and diagnostic capability.
Replace PWB
assembly.
The temperature
sensor on-board the
device has failed or
the unit has been
exposed to an
temperature extreme
beyond the
recommended limits.
−Continued−
C
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