Instruction Manual

Instruction Manual

D103557X012

Configuration

January 2015

D Stabilize/Optimize

WARNING

During Stabilize/Optimize the valve may move, causing process fluid or pressure to be released. To avoid personal injury

and property damage caused by the release of process fluid or pressure, isolate the valve from the process and equalize

pressure on both sides of the valve or bleed off the process fluid.

Stabilize/Optimize permits you to adjust valve response by changing the digital valve controller tuning. During this

routine, the instrument must be out of service; however, the instrument will respond to setpoint changes.

If the valve is unstable, select Decrease Response to stabilize valve operation. This selects the next lower tuning set

(e.g., F to E). If the valve response is sluggish, select Increase Response to make the valve more responsive. This selects

the next higher tuning set (e.g., F to G).

If after selecting Decrease Response or Increase Response the valve travel overshoot is excessive, select Decrease

Damping to select a damping value that allows more overshoot. Select Increase Damping to select a damping value that

will decrease the overshoot. When finished, select done.

Integral Settings

D Integral Dead Zone—A window around the Primary Setpoint in which integral action is disabled. This feature is used

to eliminate friction induced limit cycles around the Primary Setpoint when the integrator is active. The Dead Zone

is configurable from 0% to 2%, corresponding to a symmetric window from 0% to +/-2% around the Primary

Setpoint. Default value is 0.25%.

D Integrator Limit—The Integrator Limit provides an upper limit to the integrator output. The high limit is configurable

from 0 to 100% of the I/P drive signal.

Valve and Actuator

Field Communicator Configure > Manual Setup > Valve and Actuator (2‐2‐5)

Valve Style—Enter the valve style, rotary or sliding‐stem

Actuator Style—Enter the actuator style, spring and diaphragm, piston double‐acting without spring, piston

single‐acting with spring, or piston double‐acting with spring.

Feedback Connection—Refer to table 3‐6 for Feedback Connection options. Choose the assembly that matches the

actuator travel range.

Note

As a general rule, do not use less than 60% of the magnet assembly travel range for full travel measurement. Performance will

decrease as the assembly is increasingly subranged.

The linear magnet assemblies have a valid travel range indicated by arrows molded into the piece. This means that the hall sensor

(on the back of the DVC6200 SIS housing) has to remain within this range throughout the entire valve travel. The linear magnet

assemblies are symmetrical. Either end may be up.