Instruction Manual

DVC6000 SIS
September 2013
4-20
Figure 4-7. Feedback Connection for Typical Sliding-Stem
Actuator (Up to 4 inch Travel)
ACTUATOR
STEM
TRAVEL SENSOR SHAFT
FEEDBACK ARM
CONNECTOR ARM
ADJUSTMENT ARM
rotation by viewing the end of the travel sensor shaft
from the perspective of the actuator.
For instruments with Relay A and C: If increasing
air pressure at output A causes the shaft to turn
clockwise, enter Clockwise. If it causes the shaft to
turn counterclockwise, enter Counterclockwise.
For instruments with Relay B: If increasing air
pressure at output B causes the shaft to turn
counterclockwise, enter Clockwise. If it causes the
shaft to turn clockwise, enter Counterclockwise.
 View/Edit Feedback Connection—Select
Rotary All, SStem - Roller or SStem - Standard. For
rotary valves, enter Rotary - All, SStem - Roller.
For sliding-stem valves, if the feedback linkage
consists of a connector arm, adjustment arm, and
feedback arm (similar to figure 4-7), enter SStem -
Standard. If the feedback linkage consists of a roller
that follows a cam (similar to figure 4-8), enter Rotary
All, SStem - Roller.
 Assembly Specification Sheet—Allows you to
view and edit the Specification Sheet used by
ValveLink software.
SIS/Partial Stroke (1-2-7)
 PST Enable—Yes or No. Enables or disables
the Partial Stroke Test.
Figure 4-8. Feedback Connection for Typical Long-Stroke
Sliding-Stem Actuator (4 to 24 Inches Travel)
CAM
ROLLER
29B1665-A / DOC
STEM
CONNECTOR
 PST Enable—Checks the instrument for proper
configuration for the Partial Stroke Test to run. If the
configuration is not correct, you are given the
opportunity to correct it. Once the configuration is
correct the Partial Stroke test is enabled.
 View/Edit PST Variables—Follow the prompts
on the Field Communicator display to enter or view
information for following PST Variables: Max Travel
Movement, Stroke Speed,Pause Time, PST Press
Limit, PST Mode Enable, Pressure Set Point, and End
Pt Control Enable. For more information on the partial
stroke test see Partial Stroke Test in Section 6.
Max Travel Movement—Defines the maximum
displacement of partial stroke test signal from the
travel stop. Default value is 10%. It may be set to a
value between 1 and 30% in 0.1% increments.
Note
The Max Travel Movement is the
percentage of total span that the valve
moves away from its operating state
towards its fail state during a Partial
Stroke Test.
Stroke Speed—The stroke speed can be set for
1%/second, 0.5%/second, 0.25%/second,
0.12%/second, or 0.06%/second. The default value for
Partial Stroke Speed is 0.25%/second. For large size
actuators set the stroke speed to 0.06%/second.
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