Detailed Setup - Emerson Fisher FIELDVUE DVC2000 Instruction Manual

DVC2000 Digital Valve Controller

Detailed Setup

If the factory default configuration values need to be
changed, the DETAILED SETUP procedure provides
access. See figure 3-5 for the flowchart showing the
sequence of screens. To access this procedure from
the home screen, press the DOWN (B) arrow key four
times. The RIGHT (") arrow key brings you into the
configuration items. Once you are in a particular
configuration item, use the UP (Y) and DOWN (B)
arrow keys to select the appropriate choice.
To exit this procedure, press the RIGHT (") arrow key
3
and view the remaining configuration items until you
reach the exit screen. If you exit without saving, the
last saved configuration data will be restored.
Below is an explanation of the configuration items.
Zero Control Signal—Identifies whether the valve is
fully OPEN or fully CLOSED when the input is 0%. If
you are unsure how to set this parameter, disconnect
the current source to the instrument. The resulting
valve travel is the Zero Control Signal. This
corresponds to setting the output pressure to zero.
Pressure Units—Defines the pressure units in either
PSI, BAR, or KPA.
TRAVEL = 66.8%
14.6 MA 0.92 BAR
Y
B
QUICK SETUP
Y
B
TRAVEL
CALIBRATION
Y
B
TUNING
Y
B
ZERO CTL SIGNAL
"
DETAILED SETUP
VALVE " CLOSED
Only with Optional Position
Transmitter / Limit Switches
"
TRANSMITTER
4MA " CLOSED
CLOSED
OPEN
3-8
PRESSURE UNITS
A " A
" BAR
BAR
CLOSED
PSI
OPEN
KPA
Only with Optional Position Transmitter / Limit Switches
SWITCH1
A " SWITCH1 CLOSED
A
"
TRIP POINT " 90%
" ABOVE 90%
125%
ABOVE
...
BELOW
−25%
DISABLED
Figure 3-5. Detailed Setup Flow Chart
Input Range Low—This will correspond to 0% travel if
the Zero Control Signal is configured as closed. If the
Zero Control Signal is configured as open, this will
correspond to 100% travel.
Input Range High—This will correspond to 100% travel
if the Zero Control Signal is configured as closed. If the
Zero Control Signal is configured as open, this will
correspond to 0% travel.
Characteristic—Defines the relationship between the
travel target and the ranged set point. Ranged set
point is the input to the characterization function. If the
Zero Control Signal is closed, then a set point of 0%
corresponds to a ranged input of 0%. If the Zero
Control Signal is open, a set point of 0% corresponds
to a ranged input of 100%. Travel target is the output
from the characterization function.
Note
Travel cutoffs are enabled by default
on all units.
INPUT RANGE
INPUT RANGE A
"
"
HIGH " 20 MA
LOW " 4 MA
20MA
4MA
...
...
5MA
19MA
SWITCH2
A " A
TRIP POINT " 10%
125%
...
−25%
A A
" CHARACTERISTIC
" LINEAR
QUICK OPEN
LINEAR
EQUAL %
CUSTOM
" SWITCH2 CLOSED
A SAVE & EXIT?
"
" BELOW 10%
PRESS "
BELOW SAVE & EXIT?
ABOVE EXIT W/O SAVING?
DISABLED
July 2009