Reponse Control; Travel/Pressure Control - Fisher FIELDVUE DVC6200p Instruction Manual

Instruction Manual
D103563X012
Note
The DVC6200p may keep the Transducer Block Mode Out‐of‐Service if the instrument is not properly mounted.
To setup and calibrate the instrument, the Transducer Block Mode must be AUTO and the output block (AO or DO) must be OOS.
Protection must be None.
When performing procedures where you are prompted to change the mode, changes to Protection will be made automatically. If
you have a host system that overrides transducer block parameters ensure that the Protection setting is not left as None. Doing so
will result in transducer block parameters being overwritten. Refer to page 26 for additional information on setting Protection.
Response Control

Travel/Pressure Control

D Travel/Pressure State indicates if the instrument is being used for travel control (position control) or as an I/P
(pressure control).
D Travel/Pressure Select
CAUTION
When using Pressure Fallback Manual Recovery or Pressure Fallback Auto Recovery, the valve travel has the potential of
moving rapidly, causing potential process instability when returning to Travel Control.
Note
Travel / Pressure Select must be set to Travel for double acting actuators.
Travel / Pressure Select determines if the instrument is setup for travel position or pressure control. Select Travel,
Pressure, Travel with Pressure Fallback/Auto recovery or Travel with Pressure Fallback/Manual Recovery. If the travel
sensor fails, and Travel with Pressure Fallback/Auto Recovery is selected, it will return to travel control when the travel
sensor starts working again. Travel with Pressure Fallback/Manual recovery will stay in pressure control until Travel
Pressure Select is changed to Travel or Travel with Pressure Fallback/Auto recovery. It is not necessary to enable the
Travel Sensor Alert for Pressure Fallback to occur.
D Travel Cutoff Hi defines the high cutoff point for the travel in percent (%) of pre‐characterized setpoint. Above this
cutoff, the travel target is set to 123.0% of the ranged travel. Travel Cutoff Hi is deactivated by setting it to 125.0%.
D Travel Cutoff Lo defines the low cutoff point for the travel in percent (%) of pre‐characterized setpoint. Below this
cutoff, the travel target is set to -23%. A Travel Cutoff Lo of 0.5% is recommended to help ensure maximum shutoff
seat loading. Travel Cutoff Lo is deactivated by setting it to -25.0%
D Pressure Tune Cutoff Hi defines the high cutoff point for the pressure in percent (%) of pre‐characterized setpoint.
Above this cutoff, the pressure target is set to 123.0%. A Pressure Cutoff Open of 99.5% is recommended to ensure
valve goes fully open. Pressure Tune Cutoff Hi is deactivated by setting it 125%.
Configuration
June 2017
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