Flowserve 400MD Logix - Manual (Page 79)

11 Auto Tune Positioner Only active when Re-Cal is done
12 JogCal - Waiting for user to set point Initiates the monitoring of the button for five seconds
13 Range Checking
14 Normal Operation (Rev 0x23).
Checkjog call setting in
MISC_FLAGS
Jog Cal must be enabled in MISC_FLAGS before it can be initiated
PRESURE_
SUPPLY_
CAL_REF
Input referenc or
actual supply pres-
sure for calibration
0 – 150 psig max. Used to calibrate the span of the actuator pressure sensors
Two-point Calibration
The Logix 3400MD digital positioner has two-point calibration. The stroke position feedback poten tiometer and the actuator pressure trans-
ducers are calibrated this way. The positioner must be pre-configured to the proper air action and valve type (linear or rotary)before the
calibration is done.
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 and resource 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 PRESSURE_SUPPLY_CAL_REF. 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’ (This may take 1 minute to ~10 minutes depending on the actuator size.)
4. The positioner will return to tracking FINAL_VALUE.
5. Change MODE_BLK to desired mode
6. When calibration is completed, set transducer and resource 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 3400MD 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.
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
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