Flowserve 3400MD Digital Positioner User Manual

Page 12

Logix 3400MD Digital Positioner FCD LGENIM3404-08-AQ –5/15

Figure 5: Optional Rotary Mounting

Orienting the Take-off Arm for Final Lock Down
1. Tube the Logix 3400MD positioner to the actuator according

to the instructions given in Section 5.5, “Tubing Positioner to
Actuator.”

2. With supply pressure off, rotate the follower arm in the same

direction the shaft would rotate upon a loss of supply pressure.
When the mechanical stop of the follower arm (positioner) is
reached, rotate back approximately 15 degrees.

3. Hold the take-off arm in place; tighten the screw of the take-off arm.

NOTE: The take-off arm should be snug enough to hold the
follower arm in place but allow movement when pushed.

4. Connect regulated air supply to appropriate port in manifold.

5. Remove main cover and locate DIP switches and RE-CAL button.

6. Refer to sticker on main board cover and set DIP switches accord-

ingly. (A more detailed explanation of the DIP switch settings is
given in Section 7, “Startup.”)

7. Press the RE-CAL button for three to four seconds or until the

positioner begins to move. The positioner will now perform a
stroke calibration.

8. If the calibration was successful the green LED will blink GGGG

or GGGY and the valve will be in control mode. Continue with
step 9. If calibration failed, as indicated by a YRYR or YRRY
blink code, the A/D feedback values were exceeded and the arm
must be adjusted away from the positioners limits. Return to
step 2 and rotate the arm back approximately 10 degrees.

NOTE: Remember to remove the air supply before re-adjusting
take-off arm.

9. Tighten the nut on the take-off arm. The socket head screw of

the take-off arm must be tight, about 40 in-lb.

NOTE: If the take-off arm slips, the positioner must be
recalibrated.

WARNING: Failure to follow this procedure will result in

positioner and/or linkage damage. Check air-action and stroke

carefully before lockdown of take-off arm to spline lever adapter.