FisherÂ® FIELDVUE DVC6200 Digital Valve Controller

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Configuration July 2012 Instruction Manual D103605X012 PST Enable—Yes or No. This enables or disables the Partial Stroke Test. PST Start Point—<strong>Valve</strong> Open or <strong>Valve</strong> Closed. This defines the travel stop that the valve needs to be at before a partial stroke test can be initiated. This also defines the travel stop for end point pressure control. Setting this value to Not Configured will disable partial stroke tests and end point pressure control. PST Variables—Follow the prompts on the Field Communicator display to enter or view information for following PST Variables: Max Travel Movement— This is the percentage of total span that the valve moves away from its normal operating state towards its tripped state during the test. The default value is 10%. Test Speed—This is the rate at which the valve will move during the test. The default value is 0.25%/second. Pause Time—This is the pause time between the up and down strokes of the test. The default value is 5 seconds. Figure 3‐4. Example Time Series Plots of Travel Set Point, Travel, Error, and Actuator Pressure ACTUAL TRACE FROM TEST (TYPICAL) ACTUAL TRACE FROM TEST (TYPICAL) ACTUAL TRACE FROM TEST (TYPICAL) 32
Instruction Manual D103605X012 Configuration July 2012 Outputs Field Communicator Configure > Manual Setup > Outputs (2-2-6) HC, AD, PD or (2-2-7) ODV Output Terminal Configuration Note These menu items are only available on units that have the optional 420 mA position transmitter or switch hardware installed. Output Terminal Enable—If using the optional output terminal for a Position Transmitter or Switch output, this must be Enabled. Function—The output terminals can be configured as one of the following: Transmitter - 420mA output that represents 0100% of the calibrated valve travel. Limit Switch - Discrete switch (1A max) that trips at a configurable point within 0100% of calibrated valve travel. Alert Switch - Discrete switch (1A max) that trips based on a configurable device alert. Fail Signal—Should the output circuit fail to operate properly, the output will attempt to drive to a known state. Depending on the nature of the failure, the circuit may or may not be able to achieve this fail state. When configured as a transmitter, the output can be configured to drive high (22.5 mA) or low (3.6 mA). When configured as a switch, the output can be configured to drive Closed or Open. Note On loss of positioner power, the switch circuit will always go to the open state. However, on loss of positioner power, the transmitter output will continue to operate as long as the transmitter circuit is still powered and functioning. Switch Configuration Note Switch Configuration is only available on units that have the optional 420 mA position transmitter or switch hardware installed. Limit Switch Trip Point—When the function is configured as a Limit Switch, this defines the threshold for the limit switch in percent of calibrated travel. Alert Switch Source—When the function is configured as a Alert Switch, this determines which alert will activate the switch. The alert choices are: Travel Deviation or Pressure Fallback. Switch Closed—This configures the action of the switch. The choices are: Below Trip Point / Alert Not Active or Above Trip Point / Alert Active. 33
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FisherÂ® FIELDVUE DVC6200 Digital Valve Controller

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