Flowserve DFP17 - Manual (Page 20)

20 DataFlo Digital Electronic Positioner DFP17 Installation, Operation and Maintenance Instructions WCAIM2037
4. Full CCW position feedback reading:
Use the UP switch to manually rotate the actuator to its
full CCW position. If the shaft rotates too far, use the
DOWN switch to bring the shaft back to the full CCW
position.
Press the SEL switch to lock in the full CCW feedback
reading.
After the full CCW feedback position has been recorded,
control returns to the calibration menu.
B. Input (setpoint) Signal Calibration
1. The display will alternate between SEC and the voltage
resulting from the input current signal.
2. Full CW input reading:
Adjust the signal source to produce a 4 mA signal.
The voltage reading should be less than 1.0 volts.
Press the SEL switch to lock in the full CW input
reading.
After the full CW input value has been recorded,
control sequences to the next screen.
3. The display will alternate between SECC and the
voltage resulting from the current signal.
4. Full CCW input reading:
Adjust the signal source to produce a 20 mA signal.
Press the SEL switch to lock in the full CCW input
reading.
After the full CCW feedback position has been entered
control returns to the calibration menu.
C. Cycle Time Calibration
If this is selected, the actuator will first go to the fully
CCW position (if it is not already there) with the display
showing POSn.
The display will then show CLOS and the actuator will
travel to the full CW (closed) position and record the
travel time. At that point, the CW time measurement will
begin.
The display will then show OPEn and the actuator will
travel to the full CCW (open) position and record the
travel time. At that point, the cycle time calibration is
complete and control returns to the calibration menu.
a CAUTION: THIS PROCEDURE SHOULD ONLY BE
PERFORMED AFTER A VALID POSITION ENDPOINT
CALIBRATION PROCEDURE HAS BEEN
COMPLETED.
Position Current Output
In the Run Mode, the full CW (closed) position will produce
either 0 mA current output (for the 0-20 mA range) or 4 mA
current output (for the 4-20 mA range). The full CCW (open)
position always produces 20 mA output. This output does not
require calibration.
4.6 Run Mode
The valve actuator run mode display depends upon how the
digital positioner board has been programmed.
There are seven Run Mode display screens: POS, SEt, CyCn,
dbnd, CyC, CyCC, and ALr. The UP and DOWN switches are
used to sequence to the next or previous screen when the
parameter name screen is displayed.
For all screens described below, the display will alternate
between the name and its value. Pressing the SEL switch will
lock the value on the screen.
4.6.1 Valve Position Screen
The display alternately displays POS and xx.x, the valve
position in percent.
4.6.2 Input Setpoint
The display alternately displays SEt and xx.x in percent.
4.6.3 Cycle Count
The display alternately displays CyCn and the total run
mode cycles.
4.6.4 Deadband Readout
The display alternates between dbnd and the current
deadband value (even when Auto dbnd is selected).
4.6.5 CW and CCW Travel Time Readout
The display alternates between CyC and the calibrated
time it took (in seconds) to go from the full CCW position
to the full CW position.
Pressing the SEL key then shows the CCW time. The
display alternates between CyCC and the calibrated time
it took (in seconds) to go from the full CW position to the
full CCW position. This is useful for comparing calibrated
times with current times.
4.6.6 Alarm Status Readout
The display alternates between Alr and the current alarm
condition. A high limit alarm condition will display Hi; a
low alarm condition will display Lo; a deviation alarm
condition will display dE. For the DC positioner, the DC
motor driver IC can issue a thermal warning condition. If
that occurs, the alarm status will display thEr. Since only
one alarm condition can be shown on the display, the
deviation alarm takes priority over the other alarms.
When the deviation alarm is no longer active, the other
alarms will be shown as described above.
Flow Control
Worcester Actuation Systems