Travel History Alerts; Cycle Count/Travel Accumulator Deadband Travel Accumulator Sis Alerts - Fisher FIELDVUE DVC6200 Instruction Manual

set point. Below this cutoff,the pressure target is
set to −23%. A Pressure Cutoff Lo of 0.5% is
recommended to help ensure maximum shutoff
seat loading. Pressure Cutoff Lo is deactivated by
setting it to −25.0%
D Tvl Limit High—Travel Limit High defines the
high limit for the travel in percent (%) of ranged
travel. It is the maximum allowable travel (in
percent of ranged travel) for the valve. During
operation, the travel target will not exceed this limit.
When a Travel Limit High is set, the Travel Cutoff
High is deactivated, since only one of these
parameters can be active. Travel Limit High is
deactivated by setting it to 125.0%.
D Tvl Limit Lo—Travel Limit Low defines the low
limit for the travel in percent (%) of ranged travel. It
is the minimum allowable travel (in percent of
ranged travel) for the valve. During operation, the
travel target will not exceed this limit. When a
Travel Limit Low is set, the Travel Cutoff Low is
deactivated, since only one of these parameters
can be active. Travel Limit Low is deactivated by
setting it to −25.0%.
D Travel History Alerts
Cycle Count (1-2-3-5-1)
D Cycle Count Alrt Enab—Yes or No. Cycle
Counter Alert Enable activates checking of the
difference between the Cycle Counter and the
Cycle Counter Alert point. The Cycle Counter Alert
is set when the value exceeds the Cycle Counter
Alert point. It is cleared after you reset the Cycle
Counter to a value less than the alert point. Factory
default is No.
D Cycle Count—Cycle Counter records the
number of times the travel changes direction. The
change in direction must occur after the deadband
has been exceeded before it can be counted as a
cycle. See figure 4-4. You can reset the Cycle
Counter by configuring it as zero.
D Cycle Count Alrt Pt—Cycle Counter Alert
Point is the value of the Cycle Counter, in cycles,
which, when exceeded, sets the Cycle Counter
Alert.
Cycle Count/Tvl Accum Deadband (1-2-3-5-2)
D Deadband
Cycle Counter Deadband is the area around the
travel reference point, in percent (%) of ranged
travel, that was established at the last increment of
September 2010
Detailed Setup
Deadband exceeded, and direction
changed, new Reference Point
established
Deadband Reference
Point
Deadband (+/− 5%)
A6533-1/IL
Table 4-4. Cycle Counter Deadband (set at 10%)
the Cycle Counter. This area must be exceeded
before a change in travel direction can be counted
as a cycle. See figure 4-4.
Travel Accumulator Deadband is the area around
the travel reference point, in percent (%) of ranged
travel, that was established at the last increment of
the accumulator. This area must be exceeded
before a change in travel can be accumulated. See
figure 4-3.
Tvl Accum (1-2-3-5-3)
D Tvl Accum Alrt Enab—Yes or No. Travel
Accumulation Alert Enable activates checking of
the difference between the Travel Accumulator
value and the Travel Accumulator Alert Point. The
Travel Accumulation Alert is set when the Travel
Accumulator value exceeds the Travel Accumulator
Alert Point. It is cleared after you reset the Travel
Accumulation to a value less than the alert point.
Factory default is No.
D Tvl Accum—Travel Accumulator records the
total change in travel, in percent (%) of ranged
travel, since the accumulator was last cleared. The
value of the Travel Accumulator increments when
the magnitude of the change exceeds the Travel
Accumulator Deadband. See figure 4-3. You can
reset the Travel Accumulator by configuring it to
zero.
D Tvl Accum Alrt Pt—Travel Accumulator Alert
Point is the value of the Travel Accumulator, in
percent (%) of ranged travel, which, when
exceeded, sets the Travel Accumulator Alert.
Point at which
cycle is counted.
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