Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации, Страница: 101 / 162

Viewing Device Variables and Diagnostics
September 2013 6-7
Overview (3)
The following menus are available to define and/or
view information about the instrument. From the
Online menu select Overview.
Note
These variables are not available for
instrument level AC. Supply Pressure
alert is not available for instrument
level HC.
Analog In—the value of the instrument analog input in
mA (milliamperes) or % (percent) of ranged input.
Setpoint—the requested valve position in % of ranged
travel.
Travel—the value of the DVC6000 digital valve
controller travel in % (percent) of ranged travel. Travel
always represents how far the valve is open.
Drive Signal—the value of the instrument drive signal
in % (percent) of maximum drive.
Pressure
Shows the value of the instrument supply and output
pressures in psi, bar, kPa, or kg/cm
2
. Also shows the
output pressure differential. To display pressures may
require selecting the variable; a detail display of that
variable with its values will appear.
Pressure A—the value of Output Pressure A in
psi, bar, kPa, or kg/cm
2
.
Pressure B— the value of Output Pressure A in
psi, bar, kPa, or kg/cm
2
.
A Minus B—the value of the output pressure
differential in psi, bar, kPa, or kg/cm
2
.
Pressure—the instrument supply pressure in psi,
bar, kPa, or kg/cm
2
. Not available in instrument level
HC.
Variables
The Variables menu is available to view additional
variables, including; Auxiliary Input, Temperature,
Maximum Temperature, Minimum Temperature, Cycle
Counter, Travel Accumulator, Raw Travel Input, Run
Time, and Number of Power Ups.
Note
These variables are not available for
instrument level AC.
If a value for a variable does not appear on the
display, select the variable and a detailed display of
that variable with its value will appear. A variable’s
value does not appear on the menu if the value
becomes too large to fit in the allocated space on the
display, or if the variable requires special processing,
such as Aux Input.
Auxiliary Input—A discrete input that can be
used with an independent limit or pressure switch. Its
value is either open or closed.
Temperature—The internal temperature of the
instrument is displayed in either degrees Fahrenheit or
Celsius.
Maximum Recorded Temperature—Shows the
maximum temperature the instrument has experienced
since installation.
Minimum Recorded Temperature—Shows the
minimum temperature the instrument has experienced
since installation.
Cycle Counter—Displays the number of times
the valve travel has cycled. Only changes in direction
of the travel after the travel has exceeded the
deadband are counted as a cycle. Once a new cycle
has occurred, a new deadband around the last travel
is set. The value of the Cycle Counter can be reset
from the Cycle Count Alert menu. See page 4-15 of
the Detailed Setup section for additional information.
Travel Accumulator—contains the total change
in travel, in percent of ranged travel. The accumulator
only increments when travel exceeds the deadband.
Then the greatest amount of change in one direction
from the original reference point (after the deadband
has been exceeded) will be added to the Travel
Accumulator. The value of the Travel Accumulator can
be reset from the Travel Accumulator menu. See page
4-15 of the Detailed Setup section for additional
information.
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