Emerson FIELDVUE DVC6200f, Instruction Manual

Page: 269 / 326

Using PlantWeb Alerts
November 2010 257
Table C-2. Setting PlantWeb Alerts (Continued)
PlantWeb Alert
(Group)
(Default Alert Category)
Alert Condition
(Default)
What the Alert is
Detecting
Related Parameters and
(Default)
Guidelines for Setting
Travel Accumulator
(Travel History)
(Maintenance)
Travel Accumulator
(Disabled) The accumulated travel has
exceeded the configured limit. Alert Point (1,000,000)
Deadband (1%)
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.
Performance Critical
(Performance)
(Failed)
Performance Critical
(Enabled)
Critical performance issues
based on continuous PD tests
internal to the instrument.
None Use default setting
Performance Reduced
(Performance)
(Maintenance) Performance
Reduced
(Enabled) Reduced performance issues
based on continuous PD tests
internal to the instrument.
None Use default setting
Performance Information
(Performance)
(Advisory) Performance
Information
(Enabled) Performance Information
based on continuous PD tests
internal to the instrument.
None Use default setting
Table C-3. Using PlantWeb Alerts
PlantWeb Alert
(Group)
(Default Alert Category
Alert Condition
(Default)
What the Alert is
Detecting
Effect on Valve /
Instrument
Recommended
Action
Help
Drive Current
(Electronics)
(Failed) Drive Current
(Enabled) The difference between the
expected Drive Current and
the actual Drive Current has
exceeded the Drive Current
Alert Time. 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
instrument output pressure(s)
and actuator position being at
the Zero Power Condition. Check I/P
module 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.
Drive Signal
(Electronics)
(Maintenance) Drive Signal
(Enabled) If one of the following
conditions exist:
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%
None
−
Indicates reduced
performance.
Check
instrument
pneumatics The instrument I/P
drive signal necessary
to generate the
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.
−
Continued
−
C