DVC6000f Series
March 2006
9-12
Table 9-2. Using PlantWeb Alerts (Continued)
PlantWeb
Alert and
(Group)
Alert
Category and
(Default)
Alert Condition
and (Default)
What the Alert is
Detecting
Effect on Valve /
Instrument
Recommended
Action
Help
Travel
Deviation
(Travel)
User Config.
(Maintenance)
Travel Deviation
(Enabled)
The difference between
Setpoint and Travel is
greater than the configured
limits.
None − Indicates a
reduced performance
condition.
Check valve
friction, supply
air, instrument
tuning
The valve travel is not
following setpoint. Check
operation of the valve
and instrument. Possible
items include; sticking
valve, low supply
pressure, broken
feedback linkage,
instrument pneumatic
components, actuator,
instrument tubing, poor
instrument tuning, etc.
Test the control valve
assembly for proper
operation. AMS
ValveLink Software
diagnostics can be used
for this purpose.
Travel Limit
(Travel)
User Config.
(Advisory)
Travel Limit Hi Hi
(Disabled)
The Travel is greater than
the configured limit.
None Check process
loop
The actual valve position
has exceeded the
configurable travel limit
(in %).
Travel Limit Lo Lo
(Disabled)
The Travel is lower than the
configured limit.
None Check process
loop
N/A
(Travel)
User Config.
(N/A)
Travel Limit Hi
(Disabled)
The Travel is greater than
the configured limit.
None Check process
loop
The actual valve position
has exceeded the
configurable travel limit
(in %).
Travel Limit Lo
(Disabled)
The Travel is lower than the
configured limit.
None Check process
loop
The actual valve position
has exceeded the
configurable ltravel limit
(in %).
N/A
(Proximity)
User Config.
(N/A)
Travel Open
(Disabled)
The Travel is greater than
the Open Alert Point
None Check process
loop
The actual valve position
is near the full open
position.
Travel Closed
(Disabled)
The Travel is greater than
the Closed Alert Point
None Check process
loop
The actual valve position
is near the full closed
position.
Proximity Hi Hi
(Disabled)
The Travel is within the
configured band of the
configured center point.
None
Check process
loop
The actual valve position
is near the configured
center point.
Proximity Hi
(Disabled)
None
Proximity Lo
(Disabled)
None
Proximity Lo Lo
(Disabled)
None
Cycle Counter
(Travel History)
User Config.
(Maintenance)
Cycle Counter
(Disabled)
The number of travel
reversals has exceeded the
configured limit.
None Perform periodic
maintenance
The cycle count limit has
been exceeded. Perform
periodic maintenance.
Check packing, linkages,
diaphragms, seals, etc.
Travel
Accumulator
(Travel History)
User Config.
(Maintenance)
Travel
Accumulator
(Disabled)
The accumulated travel has
exceeded the configured
limit.
None Perform periodic
maintenance
The travel accumulator
limit has been exceeded.
Perform periodic
maintenance. Check
packing, linkages,
diaphragms, seals, etc.
−Continued−
9
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