EMERSON DVC6200 SIS Digital Valve Controllers Instruction Manual
- June 4, 2024
- Emerson
Table of Contents
Instruction Manual Supplement
D104028X012
DVC6200 SIS March 2022
Monitoring Health of External Solenoid Valve (SOV) with FIELDVUE ™ DVC6200
SIS Digital Valve
The FIELDVUE DVC6200 SIS digital valve controller can be used to monitor
the capability of the external solenoid valve to exhaust when it is briefly
de-energized (pulse test from the Logic Solver). This is achieved by using the
digital valve controller to monitor the pressure drop on the external SOV when
the voltage signal to the SOV is pulsed. The procedures contained in this
Instruction Manual Supplement are to be considered as a guideline only and
should be modified to address site‐specific requirements. Use these procedures
in conjunction with the Safety manual (D103601X012) and Instruction Manual
(D103557X012). In addition, exercise good engineering practices and abide by
specific plant safety guidelines for safe operation.
WARNING
This document is not intended to be used as a stand‐alone document. It must
be used in conjunction with the following
documents: Safety manual for FIELDVUE DVC6200 SIS Digital Valve
Controller and Position Monitor (D103601X012) FIELDVUE DVC6200 SIS Instruction
Manual (D103557X012) Failure to use this instruction manual supplement in
conjunction with the above-referenced manuals could result in personal injury
or property damage. If you have any questions regarding these instructions or
need assistance in obtaining any of these documents, contact your
Emersonsalesoffice.
Hardware and Software Requirements
The following equipment is required for testing and monitoring of SOV
performance using the DVC6200 SIS:
- Single acting valve actuator assembly
- A Logic Solver or external means capable of creating a pulse (short voltage interruption) on the external SOV. The voltage interruptions must be configurable and repeatable. The typical voltage interruptions are in the range of 20 to 1000 ms depending upon size and volume of the actuator.
- An external SOV without local manual reset. Pulsing an SOV with a manual local reset will cause the SOV to trip and not automatically reset.
- A DVC6200 SIS digital valve controller with the following: Relay C or Relay B An additional impulse line (tubing) connected downstream of the solenoid valve
- ValveLink ™ software
Final Element Pneumatic Tubing Schematics
The DVC6200 SIS digital valve controller is available with two different
internal pneumatic relays for use in single-acting applications:
RELAY C
DIRECT‐ACTING RELAY
DE-ENERGIZE TO TRIP
RELAY C is the configuration that will typically be used when the digital
valve controller is used as a shutdown device and is directly connected to the
DO of a Logic Solver.
RELAY B
REVERSE‐ACTING RELAY
ENERGIZE TO TRIP
RELAY B is the configuration that will typically be used when the digital
valve controller is only used as a test device (Partial & Full Stroke Test)
and is connected to a DCS and not a Logic Solver. The RELAY B configuration
reduces spurious trips as failures on the DVC6000 SIS will not cause the
safety valve to close (PASSIVE DEVICE).
In order to have the digital valve controller measure pressure drop on the
external SOV, additional tubing is required from downstream of the SOV to the
digital valve controller’s available input port:
- RELAY C = the available input port to measure pressure downstream of the SOV is PORT B
- RELAY B = available input port to measure pressure downstream of the SOV is PORT A
The schematics shown in figures 1 and 2 illustrate external tubing requirements when used with RELAY C or RELAY B configuration.
Figure 1. Relay C
(Direct‐Acting Relay = De‐Energize to Trip) PRESSURE IMPULSE LINE FOR
SOLENOID VALVE TESTING
Figure 2. Relay B
(Reverse‐Acting Relay = Energize to Trip) PRESSURE IMPULSE LINE FOR
SOLENOID VALVE TESTING
Configuration Steps
- Ensure that the DVC6200 SIS digital valve controller, with a single‐acting relay, is powered separately from the solenoid.
- The unused output of the DVC6200 SIS must be connected between the solenoid and the actuator as described in the Final Element Pneumatic Tubing Schematics section.
- The relay configuration selection must be “special application” and
- ValveLink software must have Triggered Profile enabled, see below. However,
- If SIS Triggers are enabled you must use the Profile view, as using Triggered Profile will overwrite the existing trigger definitions (see figure 3). See page 6 for information on setting up a Profile.
- Configure the Logic Solver.
Figure 3. Existing Trigger Definitions will be Overwritten
Setting Up SOV Health Monitoring
Triggered Profile
The Triggered Profile diagnostic test collects predefined profile data when a
triggered event occurs in the instrument.
The Performance Diagnostics Triggered Profile configuration screen is
accessible from the ValveLink software menu shown in figure 4.
Figure 4. Accessing Triggered Profile
In order to have the DVC6200
SIS record pressure and travel when a SOV pulse test occurs the Pressure
Differential Event has to be enabled, as shown in figure 5.
Figure 5. Selecting the Trigger Event
Trigger Record Length will typically be set to 20 seconds if the purpose of
the Trigger Profile Diagnostic is to record only the SOV pulse test. The
length may be increased to 60 – 100 seconds if the user intends to also record
safety and spurious trip information using the same trigger event (i.e.
Pressure Differential). Both pulsing and tripping the SOV will cause the
Profile Diagnostic to record data if the trigger event is Pressure
Differential.
Then, Clear Instrument Buffer as shown in figure 6.
Figure 6. Clearing Instrument Buffer
Profile
Using Profile allows you to preserve the user-set SIS Triggers.
The Performance Diagnostics Profile configuration screen is accessible from
the ValveLink software menu as shown in figure 7.
Figure 7. Accessing Profile
Click the Profile diagnostic test to collect the specified date.
Figure 8. Profile Diagnostic
Pulse the SOV from the Logic Solver
Use the Logic Solver or other external means to briefly de-energize the SOV.
For example, when using DeltaV SIS, an
LSTP block can be used to control duration of the pulse test, as shown in
figure 9.
Figure 9. Defining Pulse Duration
Determining Pulse Duration Time
The pulse duration must be long enough to monitor a pressure differential
across the SOV yet also be fast enough not to create any valve movement.
Typically the pulse duration is in the range of 20 to 1000 ms depending upon
actuator size and volume.
A brief test can be conducted during a Factory Acceptance Test (FAT) to define
the best pulse duration for a Final Control Element. The ValveLink software
Performance Diagnostic Profile can run continuously while the Logic Solver is
pulsing the SOV starting with a pulse duration of 20 ms up to 1000 ms (see
figure 10).
Figure 10. Example of Pulse Test
In this example,
only the first pulse test (100ms) is acceptable. The 100 ms pulse duration is
the only one which is not cause the valve to move (Valve Travel in green).
Performing SOV Health Monitoring while In-Service
ValveLink software is not necessary for the detection and recording of the
pulse signature. The DVC6200 SIS digital valve controller does it
automatically, however it is recommended to have ValveLink software
continuously connected with the digital valve controller to be able to upload
the pulse signature from the instrument memory. When the digital valve
controller detects a pressure drop on the SOV, it starts to record the pre-
configured collection variables during the pre-defined Trigger Record Length.
Data is stored in the instrument memory and the instrument is ready to record
a new pulse test as soon as a new trigger event (Pressure Differential in the
example shown in figure 11) is detected. When data is available in the
instrument memory for upload the Diag Data Available alert is activated.
The Diag Data Available alert is visible/available from the EDDL Alerts Status
view or from the ValveLink software monitoring diagnostic.
The Diag Data Available alert will remain active until it is cleared from
instrument buffer memory using ValveLink software. It is recommended that you
upload the pulse signature and clear the memory buffer after each individual
test.
Examine the graph and observe that there was a change in the pressure reading
downstream of the solenoid. The SOV is considered healthy (i.e. not stuck)
when the DVC6200 SIS detects a brief pressure drop on the SOV after the pulse.
Figure 11. Collection Variables
Figure 12
illustrates an example of SOV Health Monitor Trigger Event:
Figure 12. SOV Health Monitor Test Result Example
The trigger event is assigned a time/date stamp and can be saved
within the ValveLink software database for future reference or recordkeeping
purposes.
Neither Emerson, Emerson Automation Solutions, nor any of their affiliated
entities assumes responsibility for the selection, use or maintenance 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
2015, 2022 Fisher Controls International LLC. All rights reserved.
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