Control and Safety Valve Diagnostics Unleashed: Enable Valve Alert Reporting on Non-Smart Communicating Systems (Supplement to DVC6000 SIS)
Fisher Control and Safety Valve Diagnostics Unleashed: Enable Valve Alert Reporting on Non-Smart Communicating Systems (Supplement to DVC6000 SIS) Manuals & Guides
Instruction Manual Supplement
D103395X012
June 2009
DVC6000 SIS
Supplement to Fisherr FIELDVUEr DVC6000
SIS Series Digital Valve Controllers for
Safety Instrumented System (SIS) Solutions
Instruction Manual
Control and Safety Valve Diagnostics Unleashed: Enable
Valve Alert Reporting on Non-Smart Communicating Systems
WARNING: This instruction manual supplement is not intended to be used as a
stand-alone document. It must be used in conjunction with the following manuals:
FisherR FIELDVUEr DVC6000 Series Digital Valve Controllers for Safety Instrumented System
(SIS) Solutions Instruction Manual (D103230X012) and
The appropriate Safety Manual for FIELDVUER DVC6000 SIS Series Digital Valve Controllers for
Safety Instrumented System (SIS) Solutions (0-20 mA or 0-24 VDC [D103035X012] or 4-20 mA
[D103294X012]).
It may also be helpful to reference the Instruction Manual Supplement for HART
Communicating FisherR FIELDVUER Instruments—Using FIELDVUER Instruments with the Smart
HARTR Loop Interface and Monitor (HIM) (D103263X012).
Failure to use this application guide in conjunction with 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 Emerson Process
Management sale office.
R
www.Fisher.com
Instruction Manual Supplement
DVC6000 SIS
June 2009
Introduction
FIELDVUE instrumentation provides NO EQUAL diagnostics capabilities that clearly differentiate Fisher control
valve packages from other control valve packages. However, end-users often do not have a HART or
fieldbus-capable control system that enables them to get the benefit of FIELDVUE diagnostic capabilities.
There are two easy ways to unleash the power of valve diagnostics in such an environment:
Wireless—the THUMr adapter, or
Hardwiring—using HART to analog converters
This document provides a hardwiring technical solution, using the Smart HART Loop Interface and Monitor
(HIM) from Moore Industries, shown in figure 1, that will enable conventional analog control system users to
benefit from FIELDVUE diagnostic capabilities.
Figure 1. Moore Industries HARTr Loop Monitor
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Instruction Manual Supplement
June 2009
NO
FAULT
DETECTION
YES
ON-LINE
DIAGNOSTICS
DISCRIMINATION
FAULT
DVC6000 SIS
OFF-LINE
DIAGNOSTICS
PROCESS
RECOVERY
VALIDATION
ALERTS &
ALARMS
FIELDVUE PD
Figure 2. Four Phases of Valve Diagnostics
FIELDVUE AD
Using the Moore HIM to Convert a HARTR Signal into Analog and Digital
Control Signals
FIELDVUE diagnostics allow you to better manage abnormal situations and/or implement preventive
maintenance on control and safety valves.
The practice of valve diagnostics includes four phases:
D Fault Detection
D Fault Discrimination
D Process Recovery
D Validation
The first phase, Fault Detection, is the only phase that requires a FIELDVUE instrument (as the diagnostic tool) to
be capable of automatically reporting the unanticipated or abnormal situation. The other three phases can be
performed by temporarily attaching asset management software to the FIELDVUE instrument.
By converting a HART signal into an analog and digital control signal, the Moore HIM can be used to automatically
report a FIELDVUE instrument alert on a conventional analog control system.
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Instruction Manual Supplement
DVC6000 SIS
ANALOG INPUT: 4-20 mA VALVE TRAVEL READBACK
AI
BINARY DIGITAL INPUT: TRAVEL DEVIATION
DI
BINARY DIGITAL INPUT: DIAGNOSTIC AVAILABLE FOR DOWNLOAD
DI
AO
DCS
4-20 mA HART
PORT A
PORT B
SUPPLY PRESSURE
June 2009
100%
HIM
S
Figure 3. Using the HIM in a Conventional Analog Control System
Example: Control Valve
In this example, shown in figure 3, the HIM is used to automatically report on a conventional analog control
system:
D the real valve travel is 4-20 mA analog input
D Travel Deviation alert is a binary digital input, and
D Diagnostic Data is available as a binary digital input
When the valve deviates from the set parameters, an alert is reported in the conventional system, allowing the
operator to trigger a point-to-point diagnostic on the valve (second phase of the valve diagnostic practice: Fault
Discrimination). In this same way, the Diagnostic Data Available alert indicates to the operator that the valve has
deviated from the set parameters and that this data is available for download to facilitate the Fault Discrimination
phase.
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Instruction Manual Supplement
June 2009
PLC
BINARY DIGITAL INPUT: VALVE STUCK ALERT
DI
BINARY DIGITAL INPUT: PST DIAGNOSTIC IN PROGRESS
DI
DO
DI
24 VOLTS
24 VOLTS HART
PORT A
PORT B
S
S
S
SUPPLY PRESSURE
VALVE OPEN LIMIT SWITCH
DVC6000 SIS
100%
HIM
S
Figure 4. Using the HIM in a Safety Control System
Example: Safety Valve
The DVC6000 SIS digital valve controller can be used in conjunction with the HIM to provide additional diagnostic
coverage. Installed transparently across the 4-20 mA or 24 volt instrument loop, the HIM receives the HART
digital process data and converts the digital information into up to three scalable, isolated analog (4-20 mA)
process signals and two relay outputs that are readily accepted by an existing safety or control system, such as
the DCS or PLC.
The HIM can be used to hardwire to a PLC (through its two relay outputs) the following DVC6000 SIS alerts:
D Valve Stuck, and
D Diagnostic in Progress (PST in Progress)
The Moore HIM can also be used to automatically report the safety valve position. In some instances, this may
eliminate the need for external limit switches.
Additionally, as shown in figure 4, the HIM can also be used to disable an open external limit switch on a safety
valve during a Partial Stroke Test sequence.
Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes
responsibility for the selection, use, and maintenance of any product. Responsibility for the
selection, use, or maintenance of any product remains with the purchaser and end-user.
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Instruction Manual Supplement
DVC6000 SIS
June 2009
FIELDVUE, Fisher, and THUM are marks owned by one of the companies in the Emerson Process Management business division of Emerson
Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. HART is
a mark owned by the HART Communication Foundation. 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. Neither Emerson, Emerson Process Management, 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.
Emerson Process Management
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Chatham, Kent ME4 4QZ UK
Dubai, United Arab Emirates
Singapore 128461 Singapore
www.Fisher.com
6
EFisher Controls International LLC 2009; All Rights Reserved
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