Travel Alerts - Emerson Fisher FIELDVUE DVC2000 Instruction Manual

DVC2000 Digital Valve Controller
ALERT IS SET
ALERT IS CLEARED
A6532/IL
Figure 4-3. Travel Alert Deadband
4
travel must fall below the alert high-high point by the
Travel Alert Deadband before the alert is cleared. See
figure 4-3.
Travel Alert Lo Lo is set if the ranged travel falls below
the alert low-low point. Once the alert is set, the
ranged travel must rise above the alert low-low point
by the Travel Alert Deadband before the alert is
cleared. See figure 4-3.
D Tvl Alert Hi Pt—Travel Alert High Point is the
value of the travel, in percent (%) of ranged travel,
which, when exceeded, sets the Travel Alert High
alert.
D Tvl Alert Lo Pt—Travel Alert Low Point is the
value of the travel, in percent (%) of ranged travel,
which, when exceeded, sets the Travel Alert Low alert.
D Tvl Alert Hi Hi Pt—Travel Alert High-High Point is
the value of the travel, in percent (%) of ranged travel,
which, when exceeded, sets the Travel Alert Hi Hi
alert.
D Tvl Alert Lo Lo Pt—Travel Alert Low-Low Point is
the value of the travel, in percent (%) of ranged travel,
which, when exceeded, sets the Travel Alert Lo Lo
alert.
D Tvl Alrt DB—Travel Alert Deadband is the travel,
in percent (%) of ranged travel, required to clear a
travel alert, once it has been set. The deadband
applies to both Travel Alert Hi/Lo and Travel Alert Hi
Hi/Lo Lo. See figure 4-3.
4-10
TRAVEL ALERT
HIGH POINT
TRAVEL ALERT
DEADBAND
Setting Travel Deviation Alert
Select Setup & Diag, Detailed Setup, Alerts, and
Travel Dev Alert. Follow the prompts on the Field
Communicator display to configure the following: Tvl
Dev Alrt Enab (Travel Deviation Alert Enable), Tvl Dev
Alrt Pt (Travel Deviation Alert Point), and Tvl Dev
Time (Travel Deviation Time).
D Tvl Dev Alrt Enab—Yes or No. When enabled,
checks the difference between the travel target and
the actual travel. If the difference exceeds the Travel
Deviation Alert Point for more than the Travel
Deviation Time, the Travel Deviation Alert is set. It
remains set until the difference between the travel
target and the actual travel is less than the Travel
Deviation Alert Point minus the Travel Alert Deadband.
D Tvl Dev Alrt Pt—Travel Deviation Alert Point is
the alert point for the difference, expressed in percent
(%), between the travel target and the actual travel.
When the difference exceeds the alert point for more
than the Travel Deviation Time, the Travel Deviation
Alert is set.
D Tvl Dev Time—Travel Deviation Time is the time,
in seconds, that the travel deviation must exceed the
Travel Deviation Alert Point before the alert is set.
Setting Travel Accumulation Alert
Select Setup & Diag, Detailed Setup, Alerts, and
Travel Accum Alert. Follow the prompts on the Field
Communicator display to configure the following: Tvl
Acum Alrt Enab (Travel Accumulator Alert Enable), Tvl
Accum Alrt Pt (Travel Accumulator Alert Point), Tvl
Accum DB (Travel Accumulator Deadband), Tvl
Accum (Travel Accumulator).
D Tvl Acum Alrt Enab—Yes or No. Travel
Accumulator Alert Enable activates checking of the
difference between the Travel Accumulator value and
the Travel Accumulator Alert Point. The Travel
Accumulator Alert is set when the Travel Accumulator
value exceeds the Travel Accumulator Alert Point. It is
cleared after you reset the Travel Accumulator to a
value less than the alert point.
D Tvl Accum Alrt Pt—Travel Accumulator Alert
Point is the value of the Travel Accumulator, in
Note
The Travel Alert Deadband applies to
the Travel Deviation as well as Travel
Alert Hi/Lo and Travel Alert Hi Hi/Lo
Lo.
July 2009