Flowserve 3400IQ Digital Positioner - Manual (Page 99)


Logix 3400IQ Digital Positioner FCD LGENIM3402-00 – 0/07
flowserve.com
Procedure
Stroke and pressures are calculated when the user follows the steps below.
1. Using a fieldbus configuration application as the operator interface to device, set the transducer
block MODE_BLK parameter to OOS (Out of Service).
2. For stroke, write the value 1 to CALIBRATE. The valve will close and then open automatically. The
value will change values as the calibration continues. Once completed, CALIBRATE will return to
‘0.’ (This may take 10 seconds to ~2 minutes depending on the actuator size.)
3. For actuator pressure transducers (if so equipped), input the measured supply pressure (in psig)
in PRES_CAL. Write the value 2 to CALIBRATE. The valve will close and then open automatically.
The value will change values as the calibration continues. Once completed, CALIBRATE will return
to ‘0.’
4. The positioner will return to tracking FINAL_VALUE.
5. Change MODE_BLK to desired mode
6. When calibration is completed, set transducer block to auto mode to resume normal device
operation.
Canceling Calibration
Write ABORT to CALIBRATE. The previous values are restored and CALIBRATE returns to NONE.
Additional Calibration Features
Re-Cal button: Re-Cal is a method by which the valve can be stroke-calibrated without using the
fieldbus configurator. Important: This feature is provided to allow stroke calibration being initiated
at the positioner. However, the Logix 3400IQ digital positioner Transducer block must be placed
in Out-of-Service mode for the button to become active. After completion of the calibration cycle,
the block must be returned to normal mode for operation to resume.
Re-Cal only affects position calibration. Any previous configuration or stored information is not
affected. Re-Cal must be used to Auto Tune the positioner.
Position 0 percent Calibration Flag: During stroke calibration, the Logix 3400IQ digital positioner
checks to see if the linkage is placing the stem position sensor in range. If the valve stroke causes
stem position measurement to go out of range in the closed position, a ‘Position 0 percent Flag’
will be generated. The valve stem will stop in the closed position and the LEDs will blink Yellow Red
Yellow Red. Linkage must be adjusted to bring the sensor in range. Special LED indication: If the
linkage is out of range, the LEDs can be used as an adjustment guide. The LEDs will blink Yellow Red
Green Green when the linkage is brought into range. Refer to IOM for additional information.
Position 100 percent Calibration Flag: During stroke calibration, the Logix 3400IQ digital
positioner checks to see if the linkage is placing the stem position sensor in range. If the valve stroke
causes stem position measurement to go out of range in the open position, a ‘Position 100 percent
Flag’ will be generated. The valve stem will stop in the open position and the LEDs will blink Yellow
Red Red Yellow. Linkage must be adjusted to bring the sensor in range. Special LED indication: If the
linkage is out of range, the LEDs can be used as an adjustment guide. The LEDs will blink Yellow Red
Green Green when the linkage is brought into range.
Position Span Flag: Position span is a check during stroke calibration to verify that the valve
stem moved. The algorithm waits to see if no movement is detected when the valve is automatically
stroked open. Anything that could prevent the valve from stroking will generate a position span error
(no supply pressure, malfunctioning spool valve). When an error occurs the LEDs will blink Yellow,
Red, Red, Red.