Fisher FIELDVUE DVC6200f Digital Valve Controller PST Calibration and Testing using ValveLink Software Manuals & Guides
Instruction Manual Supplement
D104217X012
DVC6200f Digital Valve Controller
Fisher™ FIELDVUE™ DVC6200f Digital Valve
Controller PST Calibration and Testing using
February 2017
ValveLink
The test procedure contained in this Instruction Manual Supplement is to be considered as a guideline only and should
be modified to address site‐specific requirements. Use this procedure in conjunction with the DVC6200 Series quick
start guide (D103556X012
engineering practices and abide by specific plant safety guidelines for safe operation.
For additional information on Partial Stroke Testing and associated parameters refer to Partial Stroke Test Information
on page 19.
™
Software
) and the DVC6200f instruction manual (D103412X012). In addition, exercise good
PST Calibration
This document covers the basic PST calibration, as well as details for making adjustments to the normal end, using
Advanced Settings (see figure 11).
Figure 1. Calibration > Partial Stroke
www.Fisher.com
Confirm PST Tier
DVC6200f Digital Valve Controller
February 2017
Figure 2. Set Transducer Block to Manual
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Figure 3. Enter the Desire Outgoing Ramp Rate
DVC6200f Digital Valve Controller
February 2017
Supports separate ramp
rates for outing and
incoming strokes
Figure 4. Enter the Desired Incoming Ramp Rate
Additional ramp
rates for the
incoming stroke
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DVC6200f Digital Valve Controller
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Figure 5. Enter the Minimum Travel Movement
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Figure 6. Partial Stroke Calibration progress
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Figure 7. Partial Stroke Calibration progress
DVC6200f Digital Valve Controller
February 2017
Will calibrate to 30% from the normal
end if the Minimum Travel Movement +
Set Point Over Drive is less than 30%
If it is greater than 30% the user-defined
point will be calibrated
Figure 8. Step or Ramp to Normal Position on Failed PST
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DVC6200f Digital Valve Controller
February 2017
Figure 9. Partial Stroke Calibration Progress
Figure 10. Calibration Procedure Complete
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List of parameter
values being
downloaded to
the device
If you need to make adjustments to the normal end default settings, select Advanced Settings, as shown in figure 11,
and make the necessary adjustments.
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Figure 11. Select Advanced Settings to Make Adjustments to the Normal End
DVC6200f Digital Valve Controller
February 2017
Select to define the
normal end
Figure 12. Set Travel High End
Defines the
end of travel
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DVC6200f Digital Valve Controller
February 2017
Figure 13. Enter Minimum Travel Movement
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If Minimum Travel Movement + Set Point Overdrive is more than
Maximum Allowable Travel then the below message is presented
and you are directed to the next screen as shown in figure 14
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Figure 14. Review Inputs
DVC6200f Digital Valve Controller
February 2017
Minimum Travel Movement +
PST Overdrive Amount
is greater than the
Maximum Allowable Travel
Figure 15. Enter New Maximum Allowable Travel
Enter a value greater
than Minimum Travel
Movement + PST
Overdrive Amount
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DVC6200f Digital Valve Controller
February 2017
Figure 16. Partial Stroke Calibration Progress
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Configuration
After successfully calibrating the valve for PST go to the Detailed Setup FST/ PST tab and verify that the values for the
parameters in the Valve Stroke Test group box are correct. Then go to the Partial Stroke group box and enable any of
the behaviors required for the PST.
Figure 17. Verify FST/PST Values
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February 2017
Once the PST has been setup and calibrated go to the VST Abnormal Criteria group box and select the criteria to be
used to evaluate PST after they are run. Then, select the criteria to be used to abort a PST immediately on initiation,
and the criteria to be used to prohibit a PST before initiation.
Figure 18. Select VST and PST Criteria
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Categorize the stroke alerts from the Valve Stroke Alerts tab into one of the Field Diagnostic Alert categories and
suppress them if publishing on the segment is not desired.
Figure 19. Set Valve Stroke Alerts
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February 2017
Initiating a PST Diagnostic
If an Auto PST is desired then go to the Auto PST tab and set up the PST schedule. The instrument will present a
message when the next PST becomes due. If a scheduled PST is not initiated then a PST overdue alert is generated.
Figure 20. Setting Auto PST
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DVC6200f Digital Valve Controller
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To run a manual PST select the Partial Stroke Test icon as shown in figure 21.
Figure 21. Initiating a Manual PST
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Figure 22. Upload or Delete Saved Partial Stroke Diagnostics
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Before the manual PST initiates, you are given the
opportunity to upload and save the instrument
diagnostic data to ValveLink software. Select the
datasets that are Not In Database and upload. Deletion of
the data from the instrument is not necessary as new
data will overwrite the oldest dataset. Datasets that are
not uploaded to ValveLink software will not be accessible
in the instrument once they are overwritten by new data
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Figure 23. Partial Stroke Test Progress
DVC6200f Digital Valve Controller
February 2017
Outgoing Stroke
Incoming Stroke
Figure 24. PST Analyzed Data
PST Result
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DVC6200f Digital Valve Controller
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Figure 25. Resulting Press/Tvl Graph Results
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Minimum PST Pause Time Enabled – PST starts
incoming stroke on reaching the Minimum
Travel Movement (10% in this case)
Figure 26. Resulting Tvl/Time Graph Results
Select Mark Golden to set dataset as a
reference for future comparison. The
golden dataset will be stored in the
instrument and will not overwritten
by subsequent datasets
Minimum Pause Time
enabled with return lead
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February 2017
A PST Diagnostic can be run with Minimum PST Pause Time disabled, as shown in the figure below. When Minimum
PST Pause Time is disabled the pause time will be in effect when the valve reaches the desired test point, resulting in a
slower PST.
Figure 27. Disable Minimum PST Pause Time in FST/PST Partial Stroke
Minimum PST Pause
Time disabled
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DVC6200f Digital Valve Controller
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Figure 28. Resulting Press/Tvl Graph Results with Minimum Pause Time Disabled
PST travels to Minimum PST Travel + Set Point Overdrive
(20% in this case)
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Figure 29. Resulting Tvl/Time Graph Results with Minimum Pause Time Disabled
PST Pause Time
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Figure 30. PST Analyzed Data with Minimum Pause Time Disabled
DVC6200f Digital Valve Controller
February 2017
Select a PST style, either with or without Minimize PST Pause Time, and standardize on that style, as the data may be
difficult to compare between the two styles. If the desire is to minimize the amount of time the valve is away from the
normal end, then enabling Minimize PST Pause Time is recommended. If the amount of time away from the normal
end is not a concern, then disabling Minimize PST Pause Time will cause the set point to pause at the end of the
outgoing stroke for the travel to catchup to the set point. The results of the test with the Minimize PST Pause Time
disabled will be similar to the PST as offered in earlier versions of SIS instruments.
Partial Stroke Test Information
Valve Stroke Test
A valve stroke test is the process of taking the valve from the normal end to another target position at a preconfigured
ramp rate before returning to the normal end while gathering data. The data is analyzed to evaluate the condition of
the valve assembly against a set of user defined thresholds. A valve stroke test is only run if everything is normal in the
instrument. A safety demand signal will always take precedence over a valve stroke test.
D Valve Stroke Test, select Partial Stroke Test, Full Stroke Test, or Disable to select the test to run when the test is
initiated using the VST_COMMAND parameter.
D Partial Stroke Start Point defines the normal end of the valve. The valve needs to be at this end for a PST to be
initiated. When a FST is initiated the valve will be moved by the test to this end before being ramped to the opposite
end and ramped back. Setting this value to Not Configured will disable partial stroke tests.
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D Travel Open End defines, in percent (%) of calibrated travel, the point above which the valve is considered to have
reached the high end.
D Travel Closed End defines, in percent (%) of calibrated travel, the point below which the valve is considered to have
reached the low end.
D Test Pause Time is the time between the outgoing and incoming strokes of the test. The default value is 5 seconds.
Pause Time will not be used if Minimum PST Pause Time is enabled. The outgoing stroke is from the normal end to
the PST target and the incoming stroke is the return stroke to normal. See figure 31.
D VST High Friction Breakout Pressure indicates that the breakout required a higher force than configured by the user.
Refer to figure 31.
D VST Low Friction Breakout Pressure indicates that the breakout required a lower force than configured by the user.
Refer to figure 31.
D Action On a Failed Test defines if the valve should step or ramp back on a failed stroke test.
Figure 31. Valve Signature Representation
j
k
l
m
n
PRESSURE
j SUPPLY PRESSURE
k INCOMING PRESSURE THRESHOLD
l LOW FRICTION BREAKOUT PRESSURE THRESHOLD
m HIGH FRICTION BREAKOUT PRESSURE THRESHOLD
n OUTGOING PRESSURE THRESHOLD
o TARGET TRAVEL MOVEMENT 100%
INCOMING STROKE
TRIPPED
TRAVEL
VST Abnormal & Abort Criteria
RANDOMIZATION
o
PST START POINT
OUTGOING STROKE
NORMAL
D VST Abnormal Criteria
A partial stroke test is marked as abnormal if it fails one of the following criteria.
The device always evaluates a PST on the following criteria:
1. Target Travel achieved
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2. Return to the normal end
In addition to the above, any of the following can be selected to evaluate a Partial Stroke Test.
1. Breakout Time
2. Outgoing Pressure Threshold
3. Incoming Pressure Threshold
4. High Friction Breakout Pressure
5. Low Friction Breakout Pressure
D VST Abort Criteria
The PST is terminated and the valve is returned to the normal end. The return to the normal end will be per the user
configuration for an aborted test. The abort criteria will only be active if it is added as a criteria to be evaluated during
PST by adding it to the PST Abnormal Criteria.
The device always aborts a PST if the Max Travel displacement is exceeded.
In addition to the above, any of the following can be selected to abort a Partial Stroke Test:
1. Breakout Time
2. Incoming Pressure Threshold
3. High Friction Breakout Pressure
Partial & Full Stroke
D Partial Stroke
PST Max Travel defines how much travel displacement is allowed before the PST aborts (see figure 32).
PST Minimum Travel is the percentage of total span that the valve moves away from its normal operating end of travel
towards its tripped end of travel during the test. The default value is 10%.
Set Point Overdrive defines the extent of the set point overdrive over the Minimum Travel Movement when the early
turn around is enabled. When the early turn around is not enabled it defines the travel target.
Freeze Analog / Discrete Feedback when enabled, freezes the corresponding feedback during a partial stroke test.
Minimum PST Pause Time, when enabled, the incoming stroke is initiated as soon as the travel reaches the minimum
travel movement. Refer to figure 32 for a time series representation of this parameter.
Randomized PST, when enabled the instrument randomizes the target travel, for each PST.
PST Randomization is defined in percent (%) of calibrated travel span, it defines the extent of randomization from the
minimum travel movement towards the normal end. If the user defined randomization is too large the instrument will
cap the max randomization to ensure that there will be at least 1% travel movement away from the defined normal
end. Refer to figure 31.
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DVC6200f Digital Valve Controller
February 2017
Figure 32. Time Series Representation of Minimum PST Pause Time
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TRAVEL
NORMAL
REDUCED
PST TIME
NORMAL
TRAVEL
OUTGOING
RAMP RATE
INCOMING
RAMP RATE
RETURN
LEAD
j
j
SETPOINT
OVERDRIVE
PAUSE TIME
MINIMUM PST PAUSE TIME
DISABLED
TIME
k
BREAKOUT
TIMEOUT
SETPOINT
OVERDRIVE
TURNAROUND
MINIMUM PST PAUSE TIME
EARLY
ENABLED
RETURN
LEAD
TIME
j MINIMUM TRAVEL MOVEMENT
k MAX. ALLOWABLE TRAVEL
Outgoing Ramp Rate is the rate at which the valve will move during the Outgoing stroke of the Partial Stroke test. The
default value is 0.25%/second.
Incoming Ramp Rate is the rate at which the valve will move during the Incoming stroke of the Partial Stroke test. The
default value is 0.25%/second.
PST Return Lead defines the percent (%) change in setpoint to overcome the hysteresis in the valve assembly. The error
between setpoint and actual error is added to this percent change. For example, if the Return Lead is set at 0.5% and
there is a 1% error this will be set at 1.5%
PST Breakout Timeout is the user configured amount of time before which the valve must leave the normal end during
a PST.
VST Outgoing Pressure Threshold defines the actuator pressure at which a partial stroke test will abort during the
outgoing stroke (see figure 31). This prevents the DVC6200f from exhausting (or building) excessive pressure from/to
the actuator in an attempt to move a stuck valve. During PST Calibration, the Partial Stroke Outgoing Pressure
Threshold will be set automatically.
VST Incoming Pressure Threshold defines the actuator pressure at which a partial stroke test will abort during the
incoming stroke (see figure 31). This prevents the DVC6200f from exhausting (or building) excessive pressure from /
to the actuator in an attempt to move a stuck valve.
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D Full Stroke
Full Stroke Ramp Rate is the rate at which the valve will move during the full stroke test.
FST Wait Time is the amount of time to wait for the valve to move to the normal end after initiation of the full stroke
test.
Full Stroke Breakout Timeout is the user configured amount of time before which the valve must leave the normal end
during a full stroke test.
PST Prohibited
A partial stroke test will not be initiated if any of the following user-configurable conditions are active:
1. Check Bit Alert
2. Drive Current
3. Drive Signal
4. Processor Impaired
5. Travel Sensor
6. Output Pressure sensor
7. Supply Pressure Sensor
8. Temperature Sensor
9. Supply Pressure
10. Temperature Limit
11. Travel Deviation
12. Pressure Fallback
13. PST Abnormal
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of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Fisher, FIELDVUE, and ValveLink are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co.
Emerson Automation Solutions, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property
of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not
to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are
governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such
products at any time without notice.
Emerson Automation Solutions
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore
www.Fisher.com
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E 2017 Fisher Controls International LLC. All rights reserved.
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