Emerson FIELDVUE DVC6200f, Instruction Manual

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Viewing Device Variables and Diagnostics
November 2010 215
based on the results, determine if the block is
operating normally.
AO Control
−
Pre-Characterization
Field Communicator TB
>
Device Variables
>
AO Control
−
Pre-Char
Setpoint
Setpoint (FINAL_VALUE.VALUE [13.2]) shows the
value of the setpoint in % (percent) of ranged travel or
pressure. Setpoint is used for both travel and pressure
control. This parameter will be written directly if the
transducer block is in MAN mode, or will be written
automatically by the AO block if the transducer block
is in AUTO mode.
Setpoint Status
Shows the Foundation Fieldbus status of Setpoint
Value (FINAL_VALUE.STATUS [13.2]); Good,
Uncertain, or Bad.
Travel (DeChar)
Travel (FINAL_POSITION_VALUE.VALUE [17.2])
shows the value of the travel in % (percent) of ranged
travel. Travel always represents how far the valve is
open.
AO Control-Post Characterization
Field Communicator TB
>
Device Variables
>
AO Control-Post Char
Travel Target
Travel target is the output from the characterization
function.
Travel
Travel (TRAVEL.VALUE [34.2]) displays the actual
position of the valve in percent (%) of calibrated travel.
Travel Status
Shows the Foundation Fieldbus status of Travel Value
(TRAVEL.STATUS [34.1]); Good, Uncertain, or Bad.
DO Control
Field Communicator TB
>
Device Variables
>
DO Control
Setpoint(D)
Discrete Setpoint (SETPOINT_D.VALUE [32.2])
shows the value of the setpoint in discrete values.
0 = closed, 1 = open, 5, 10, 15... = setpoint in 5%
units. This parameter will be written directly if the
transducer block is in MAN mode, or will be written
automatically by the DO block if the transducer block
is in AUTO mode.
Travel(D)
Travel (TRAVEL_D.VALUE [33.2]) shows the value of
the setpoint in discrete values. 0 = closed, 1 = open,
5, 10, 15... = setpoint in 5% units.
Input Characterization
Field Communicator TB
>
Device Variables
>
Input Characterization
Input Characterization (INPUT_CHAR [50]) defines
the relationship between the setpoint specified by the
output function block and the desired valve position.
Travel/Pressure State
Field Communicator TB
>
Device Variables
>
Travel/Pressure State
Travel/Pressure State (TVL_PRESS.STATE [41.2])
indicates if the instrument is being used for travel
control (position control) or as an I/P (pressure control)
PD Inside Status
Field Communicator TB
>
Device Variables
>
PD Inside Status
PD Inside Status shows the status of Performance
Diagnostics.
Protection
Field Communicator TB
>
Device Variables
>
Protection
Indicates the status of Protection.
Drive Signal
Field Communicator TB
>
Device Variables
>
Drive Signal
Drive Signal (DRIVE_SIGNAL [53]) indicates the drive
signal, as a percentage of the maximum drive
available, going to the I/P converter from the printed
wiring board. In most applications, the drive signal
ranges between 50% and 75% of the maximum drive
signal.
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