DVC6000f Digital Valve Controllers
December 2009
4-38
Figure 4-6. Feedback Connection for Typical Sliding-Stem
Actuator (Up to 4 inch Travel)
ACTUATOR
STEM
TRAVEL SENSOR SHAFT
FEEDBACK ARM
CONNECTOR ARM
ADJUSTMENT ARM
Actuator Model Number
Enter the type number for the actuator
(ACT_MODEL_NUM [23]) on which the instrument is
mounted.
Actuator Style
Select the Actuator Style (ACTUATOR_STYLE
[42.1]), spring & diaphragm, piston double-acting
without spring, piston single-acting with spring, or
piston double-acting with spring.
Actuator Serial Number
Enter the serial number (ACT_SN [24]) for the
actuator on which the instrument is mounted.
Actuator Size
Enter the size of the actuator (ACTUATOR_SIZE
[85.1]) on which the instrument is mounted.
Actuator Fail Action
Sets actuator action to be performed upon loss of
actuator air pressure (ACT_FAIL_ACTION [21]).
Feedback Connection
Select the Feedback Connection (FEEDBACK_CONN
[42.4]), RShaft Pot, SStem Roller Pot, or SStem Pot.
For rotary valves, enter RShaft Pot. For sliding-stem
valves, if the feedback linkage consists of a connector
arm, adjustment arm, and feedback arm, similar to the
CAM
ROLLER
29B1665-A / DOC
STEM
CONNECTOR
Figure 4-7. Feedback Connection for Typical Long-
Stroke Sliding-Stem Actuator (4 to 24 Inches Travel)
linkage shown in figure 4-6, enter SStem Pot. If the
feedback linkage consists of a roller that follows a
cam, similar to the linkage shown in figure 4-7, enter
SStem Roller Pot.
Travel Sensor Motion
Note
The Travel Sensor Motion is set
automatically by Device Setup, or
during the Auto Calibration procedure.
Select Clockwise or Counterclockwise. Travel Sensor
Motion (TRAVEL_SEN_MOTION [42.3]) establishes
the proper valve travel sensor (feedback) rotation.
WARNING
If you answer YES to the prompt for
permission to move the valve when
setting the Travel Sensor Motion, the
instrument will move the valve
through its full travel range. To avoid
personal injury and property damage
caused by the release of pressure or
process fluid, provide some
temporary means of control for the
process.
Determine the rotation by viewing the end of the travel
sensor shaft.
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