Fisher FIELDVUEDVC6200f Instruction Manual page 193

Instruction Manual
D103412X012
Table C‐3. Using Field Diagnostic Alerts (continued)
Field Diagnostic Alert
Alert Condition
(Group)
(Default Alert Category)
Travel Deviation Travel Deviation
(Travel) (Enabled)
(Offspec)
Travel Limit Travel Limit Hi Hi
(Travel) (Disabled)
(Maintenance)
Travel Limit Lo Lo
(Disabled)
Travel Limit Hi
(Travel) (Disabled)
Travel Limit Lo
(Disabled)
Travel Open
(Proximity) (Disabled)
Travel Closed
(Disabled)
Proximity Hi Hi
(Disabled)
Proximity Hi
(Disabled)
Proximity Lo
(Disabled)
Proximity Lo Lo
(Disabled)
Movement History
Cycle Counter
(Travel History) (Disabled)
(Offspec)
Travel
Accumulator
(Disabled)
(1)
Performance Critical Performance
(Performance) Critical
(Failed) (Enabled)
What the Alert is Detecting
(Default)
The Travel Deviation has
exceeded the Travel Deviation
Alert Point by more than the
Travel Deviation Time.
The Travel has exceeded the
Travel Limit Hi Hi Alert Point.
The Travel is lower than the
Travel Limit Lo Lo Alert Point.
The Travel has exceeded the
Travel Limit Hi Alert Point.
The Travel is lower than the
Travel Limit Lo Alert Point.
The Travel is greater than the
Open Alert Point
The Travel is greater than the
Closed Alert Point
The Travel is within the
configured band of the
configured center point.
The number of travel reversals
has exceeded the configured
limit.
The accumulated travel has
exceeded the configured limit.
Critical performance issues
based on continuous PD tests
internal to the instrument.
Effect on Valve/Instrument
None - Indicates a reduced
performance condition.
None
None
None
None
None
None
None
None
None
None - Indicates control has
been lost or severely reduced.
-Continued-
DVC6200f Digital Valve Controller
Field Diagnostic Alerts
Recommended
Action
Check valve The valve travel is not
friction, supply air, following setpoint.
instrument tuning 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
tubing, poor
instrument tuning, etc.
Test the control valve
assembly for proper
operation. ValveLink
software diagnostics
can be used for this
purpose.
Check process The actual valve
loop position has exceeded
the configurable travel
limit (in %).
Check process
loop
The actual valve
Check process
loop position has exceeded
the configurable travel
Check process
limit (in %).
loop
Check process The actual valve
loop position has exceeded
the configurable travel
Check process
limit (in %).
loop
Check process
loop
Either the actual value
Perform periodic
maintenance of the travel
accumulator or the
cycle counter has
Perform periodic
exceeded the
maintenance
configurable limit.
Check I/P, Relay, On‐board diagnostics
Valve, Actuator or have detected a critical
Ext. Tubing as performance issue that
indicated. may result in loss of
control or severe
reduction in control
performance. Check or
replace the component
indicated in the
possible cause detail.
February 2017
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