Emerson FIELDVUE DVC6200f Instruction Manual page 269

PlantWeb Alert
Alert Condition
(Group)
(Default)
(Default Alert Category)
Travel Accumulator
Travel Accumulator
(Travel History)
(Disabled)
(Maintenance)
Performance Critical
Performance Critical
(Performance)
(Enabled)
(Failed)
Performance Reduced Performance
(Performance) Reduced
(Maintenance) (Enabled)
Performance Information Performance
(Performance) Information
(Advisory) (Enabled)
PlantWeb Alert
Alert Condition
(Group)
(Default)
(Default Alert Category
Drive Current Drive Current
(Electronics) (Enabled)
(Failed)
Drive Signal Drive Signal
(Electronics) (Enabled)
(Maintenance)
November 2010
Table C-2. Setting PlantWeb Alerts (Continued)
What the Alert is Related Parameters and
Detecting
The accumulated travel has Alert Point (1,000,000)
exceeded the configured limit. Deadband (1%)
Critical performance issues
based on continuous PD tests None
internal to the instrument.
Reduced performance issues
based on continuous PD tests
None
internal to the instrument.
Performance Information
based on continuous PD tests None
internal to the instrument.
Table C-3. Using PlantWeb Alerts
What the Alert is
Detecting
The difference between the If configured for Self Test
expected Drive Current and Shutdown, then the
the actual Drive Current has transducer Actual mode is
exceeded the Drive Current placed Out of Service until the
Alert Time. problem is fixed. Out of
Service results in the
instrument output pressure(s)
and actuator position being at
the Zero Power Condition.
None − Indicates reduced
If one of the following
conditions exist: performance.
Where Zero Power Condition
is defined as closed:
Drive Signal 10% and
<
Calibrated Travel 3%
>
Drive Signal 90% and
>
Calibrated Travel 97%
<
Where Zero Power Condition
is defined as open:
Drive Signal 10% and
<
Calibrated Travel 97%
<
Drive Signal 90% and
>
Calibrated Travel 3%
>
−Continued−
Using PlantWeb Alerts
Guidelines for Setting
(Default)
Packing Bonnets— enable the alert in
the Maintenance Alert Category. When
packing leaks are discovered, set the
Travel Accumulator alert to 90% of the
current Travel Accumulator Value,
triggering an alert prior to anticipated
leak.
Use default setting
Use default setting
Use default setting
Effect on Valve / Recommended
Instrument Action
Check I/P
module
Check
instrument
pneumatics
Help
The instrument has
detected that the
difference between the
expected Drive
Current and the actual
Drive Current is
greater than the
configured limit
1) Replace the I/P
module
2) Calibrate the
device.
If the problem persists,
replace the printed
wiring board (PWB)
assembly.
The instrument I/P
drive signal necessary
to generate the
C
pressure output from
the instrument is not
within the expected
range. Potential
causes include I/P
filter plugged,
instrument pneumatic
relay failure, low
supply pressure, air
leaks, or valve
sticking. Test the
control valve assembly
for proper operation.
ValveLink diagnostics
can be used for this
purpose.
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