Available Configurations

DVC6010f: Sliding-stem applications
DVC6020f: Rotary and long-stroke sliding-stem applications [over 102 mm (4 inch) travel]
DVC6030f: Quarter-turn rotary applications

Remote-Mounted Instrument(1)

DVC6005f: Base unit for 2 inch pipestand or wall mounting
DVC6015: Feedback unit for sliding-stem applications
DVC6025: Feedback unit for rotary or long-stroke sliding-stem applications
DVC6035: Feedback unit for quarter-turn rotary applications
DVC6000f digital valve controllers can be mounted on Fisher and other manufacturers' rotary and sliding-stem actuators.

Control Level

■Standard Control (throttling control)
Includes AO, PID, ISEL, OS, AI, MAI, DO, and four DI function blocks
■Fieldbus Control (throttling control)
AO function block
■Fieldbus Logic [discrete (on/off) connectivity]
Includes DO, and four DI function blocks

Block Execution Times

Electrical Input

Voltage Level: 9 to 32 volts
Maximum Current: 18 mA
Reverse Polarity Protection: Unit is not polarity sensitive
Termination: Bus must be properly terminated per ISA SP50 guidelines

Digital Communication Protocol

FOUNDATION fieldbus registered device
Physical Layer Type(s):
121—Low-power signaling, bus-powered, Entity Model I.S.
511—Low-power signaling, bus-powered, FISCO I.S.

Fieldbus Device Capabilities

Backup Link Master capable

Output Signal(2)

Pneumatic signal as required by the actuator, up to full supply pressure.
Minimum Span: 0.4 bar (6 psig)
Maximum Span: 9.5 bar (140 psig)
Action: Double, Single direct, and Single reverse

Supply Pressure(2)(6)

Recommended: 0.3 bar (5 psi) higher than maximum actuator requirements, up to maximum supply pressure
Maximum: 10 bar (145 psig) or maximum pressure rating of the actuator, whichever is lower
Medium: Air or Natural Gas(7) Air Quality: Supply pressure must be clean, dry air that meets the requirements of ISA Standard 7.0.01. A maximum 40 micrometer particle size in the air system is acceptable. Further filtration down to 5 micrometer particle size is recommended. Lubricant content is not to exceed 1 ppm weight (w/w) or volume (v/v) basis. Condensation in the air supply should be minimized
Natural Gas: Natural gas must be clean, dry, oil-free, and noncorrosive. H2S content should not exceed 20 ppm.

Steady-State Air Consumption(2)(3)(4)

Standard Relay: At 1.4 bar (20 psig) supply pressure: Less than 0.38 normal m3/hr (14 scfh)
At 5.5 bar (80 psig) supply pressure: Less than 1.3 normal m3/hr (49 scfh)
Low Bleed Relay: At 1.4 bar (20 psig) supply pressure: Average value 0.056 normal m3/hr
(2.1 scfh)
At 5.5 bar (80 psig) supply pressure: Average value 0.184 normal m3/hr (6.9 scfh)

Maximum Output Capacity(3)(4)

At 1.4 bar (20 psig) supply pressure:
10.0 normal m3/hr (375 scfh)
At 5.5 bar (80 psig) supply pressure:
29.5 normal m3/hr (1100 scfh)

Independent Linearity(2)(5)

±0.50% of output span

Electromagnetic Compatibility

Meets EN 61326-1 (First Edition)
 Immunity—Industrial locations per Table 2 of   the EN 61326-1 standard. Performance is   shown in table 3 below
 Emissions—Class A
  ISM equipment rating: Group 1, Class A
Lightning and Surge Protection—The degree of immunity to lightning is specified as Surge immunity in table 3. For additional surge protection commercially available transient protection devices can be used.

Vibration Testing Method

Tested per ANSI/ISA-75.13.01 Section 5.3.5. A resonant frequency search is performed on all three axes. The instrument is subjected to the ISA specified 1/2 hour endurance test at each major resonance, plus an additional two million cycles.

Humidity Limits

Tested per IEC 61514-2

Operating Ambient Temperature Limits(6)

-40 to 80°C (-40 to 176°F) for most approved valve-mounted instruments
-60 to 125°C (-76 to 257°F) for remote-mounted feedback units
-52 to 80°C (-62 to 176°F) for valve-mounted instruments utilizing the Extreme Temperature option (fluorosilicone elastomers)

Electrical Classification

CSA—Intrinsically Safe and FISCO, Explosion proof, Division 2, Dust-Ignition proof
FM—Intrinsically Safe and FISCO, Explosion proof, Non-incendive, Dust-Ignition proof
ATEX—Intrinsically Safe and FISCO, Flameproof, Type n
IECEx—Intrinsically Safe and FISCO, Flameproof, Type n
NEPSI—Intrinsically Safe, Flameproof
Refer to tables 4, 5, 6, 7, and 8 for specific approval information
Electrical Housing.
CSA—Type 4X, IP66
FM—NEMA 4X
ATEX—IP66
IECEx—NEMA 4X, IP66
NEPSI—IP66

Other Classifications/Certifications

TIIS—Japan
GOST-R—Russian GOST-R
FSETAN—Russian - Federal Service of
Technological, Ecological and Nuclear Inspectorate
INMETRO—Brazil
Contact your Emerson Process Management sales office for classification/certification specific information

Connections

Supply Pressure: 1/4 NPT internal and integral pad for mounting 67CFR regulator
Output Pressure: 1/4 NPT internal
Tubing: 3/8-inch recommended
Vent: 3/8 NPT internal
Electrical: 1/2 NPT internal, M20 adapter optional

Construction Materials

Housing, module base and terminal box: ASTM B85 A03600 low copper aluminum alloy (standard)
CF8M (cast 316 stainless steel) (optional for valve-mounted instruments only)
Cover: Thermoplastic polyester
Elastomers Standard: Nitrile
Optional: Fluorosilicone

Stem/Shaft Travel

Linear Actuators with rated travel between 6.35 mm (0.25 inch) and 606 mm (23.375 inches)
Rotary Actuators with rated travel between 50 degrees and 180 degrees

Mounting

Designed for direct actuator mounting or remote pipestand or wall mounting. Mounting the instrument vertically, with the vent at the bottom of the assembly, or horizontally, with the vent pointing down, is recommended to allow drainage of moisture that may be introduced via the instrument air supply.

Weight

Valve-Mounted Instruments Aluminum: 3.5 Kg (7.7 lbs)
Stainless Steel: 7.7 Kg (17 lbs)
Remote-Mounted Instruments DVC6005f Base Unit: 4.1 Kg (9 lbs)
DVC6015 Feedback Unit: 1.3 Kg (2.9 lbs)
DVC6025 Feedback Unit: 1.4 Kg (3.1 lbs)
DVC6035 Feedback Unit: 0.9 Kg (2.0 lbs)

Options

■ Supply and output pressure gauges or ■ Tire valves, ■Integral mounted filter regulator,
■ Stainless steel housing, module base and terminal box (valve-mounted instruments only)
■Control Level: Standard Control, Fieldbus Control, or Fieldbus Logic
■Diagnostic Level: Performance Diagnostics, Advanced Diagnostics, or Fieldbus Diagnostics

• EDD Availability—An extended device description is available for the DVC6000f digital valve controller. Using this file, any EDD compatible host can provide graphic user interface to the DVC6000f configuration, calibration, and diagnostic capabilities.
• Improved Control—Two-way digital communications give you current valve conditions. You can use this real-time information to make sound process management decisions. By analyzing valve dynamics through ValveLink software you can identify control areas needing improvement and maintain a high level of system performance.
• Valve and Actuator Data at your Fingertips—Accurate information is the key to valve diagnostics. Valve and actuator spec sheet data for diagnostic use are embedded in the DVC6000f instrument during factory mounting, providing up-to-date and accurate information.
• Enhanced Safety—You can check instrument and valve operation and keep the process running smoothly and safely from a remote location. Access is possible at a field junction box, marshalling panel, or within the safety of the control room using either a Field Communicator, personal computer, or a system workstation. Your exposure to hazardous environments is minimized and you can avoid having to access hard-to-reach valve locations.
• Hardware Savings—DVC6000f digital valve controllers, when used in an integrated system, allow you to realize significant hardware and installation cost savings by replacing other devices in the process loop, such as positioners and limit switches, with a FIELDVUE digital valve controller.
• Travel Control-Pressure Fallback—Valve position feedback is critical to the operation of a digital valve controller. Without this feedback, the control valve assembly traditionally goes to its fail safe position. The DVC6000f can detect position feedback problems caused by a travel sensor failure or linkage failure and continue to operate in “pressure control” mode.

If a problem with the valve position feedback is detected, the instrument will automatically disable the travel sensor, send an alert, and control it's output pressure much like a fieldbus-to-pressure transducer. This allows the valve assembly to continue to operate with reduced accuracy until maintenance can be scheduled.

• Built to Survive—Field-tough DVC6000f digital valve controllers have fully encapsulated printed wiring boards that resist the effects of vibration, temperature, and corrosive atmospheres. A separate weather-tight field wiring terminal box isolates field-wiring connections from other areas of the instrument. Optional stainless steel, remote mount, and extreme temperature constructions provide added durability to any application need.
• Increased Uptime—With the self-diagnostic capability of DVC6000f digital valve controllers, you can answer questions about a valve's performance, without pulling the valve from the line. Diagnostics that evaluate the health of the valve assembly, such as instrument supply pressure droop, valve stuck, damaged feedback, friction, deadband analysis and trending, run continuously while the valve is in service and operating. You can also compare the present valve/actuator signature (bench set, seat load, friction, etc.) against previously stored signatures to discover performance changes, before they impact process control.
• Faster Commissioning—The two-way communication capability allows you to quickly commission loops by remotely identifying each instrument, verifying its calibration, reviewing stored maintenance notes, and more.
• Upgrades Made Easy—Using FIELDVUE HotLinkTM technology, firmware upgrades can be downloaded to the DVC6000f instrument over the fieldbus segment wiring, with minimal interruption to process operations. This unique capability lets you take advantage of firmware improvements and increase functionality, while making the upgrade process fast and convenient right from the control room.
• Easy Maintenance—The DVC6000f is modular in design. The single module base can be removed from the instrument housing without disconnecting the field wiring, pneumatic connections or stem linkages. This module contains the critical sub-modules so component removal is quick and simple.

Control Function Blocks

In addition to the resource and transducer block, the digital valve controller, depending on control and diagnostic capability, may contain the following control function blocks. See table 1 for control level details.

Note
The Fieldbus Foundation logo (see Print Version) indicates that the function block is certified as interoperable by the Fieldbus Foundation.

The AO function block provides analog output capability as defined by the Fieldbus Foundation. The AO function block provides a connection to the positioning algorithm (transducer block).
The PID function block provides proportion-plus-integral-plus-derivative control for the inputs to the function block and drives the outputs.
The ISEL function block selects from up to four inputs and may provide the selected signal as input to the PID function block. The input selection can be configured to select the first good input signal; a maximum, minimum or average value; or a hot spare.
The OS function block accepts the output from another function block (such as a PID block) and creates two outputs that are scaled or split, according to the user configuration. This block is typically used for split ranging of two control valves.
The AI function block monitors device measurements from a DVC6000f and provides it as an output to another block.

The MAI function block has the ability to process up to eight device measurements from a DVC6000f and make them available to other function blocks.
The DO function block processes a discrete set point and sends it to a specified output channel. In the digital valve controller, the discrete output block provides both normal open/closed control and the ability to position the valve in 5% increments for course throttling applications.
The DI function block processes a single discrete input from a field device and makes it available to other function blocks. In the digital valve controller, the discrete input function block can provide limit switch functionality and valve position proximity detection.
The DO and DI function blocks in a DVC6000f instrument can also provide dribble control using 5% positioning. In a batch environment, vessels are filled through on-off valves for speed, but there can be a problem at shutoff. The amount of material may not be “close enough” for the recipe and additional material may have to be added. This addition can be tricky and/or time consuming for the operator. The capability of being able to “crack” the valve to 5 to 10% and “dribble” in the correct amount either manually or automatically through recipe control can provide significant reduction in variability, and reduction in “FDA-like” reporting and certification. In addition, it can eliminate the need for a second smaller on-off valve or the operator climbing up and dumping in a pail of material to add “just the right amount.”

Performance Diagnostics

The latest generation of Fisher FIELDVUE diagnostics, Performance Diagnostics (PD), are now built right into the DVC6000f. These diagnostics allow the DVC6000f to continuously perform checks on the valve assembly without disturbing or interrupting the control valve while it is in the process. Actuator/tubing leakage, air supply availability, calibration shift, and other issues are continuously reviewed and evaluated. The DVC6000f can then automatically trigger PlantWeb alerts, as shown in figure 3, that forewarn the user of issues before they impact process operation.
Additional Performance Diagnostic testing that can be scheduled or run manually during on-line operation include:

• On-Line Friction and Deadband Analysis (see figure 4)
• Friction and Deadband Trending

While all diagnostics can be run while the valve is inline, Performance Diagnostics can be performed while the valve is in service and operating.

Advanced Diagnostics

Advanced Diagnostics include the following dynamic scan tests:

• Valve Signature (see figure 5)
• Dynamic Error Band
• Instrument Drive Signal

These diagnostics are run while the control valve is blocked out and not controlling the process. The diagnostic scans vary the positioner set point at a controlled rate and plot valve operation to determine valve dynamic performance. The valve signature test allows you to determine the valve/actuator friction, bench set, spring rate, and seat load. The Dynamic Error Band test is a combination of hysteresis and deadband plus “slewing.” Hysteresis and deadband are static measurements. However, because the valve is moving, a dynamic error, or “slewing” error is introduced.
Dynamic scan tests give a better indication of how the valve will operate under process conditions which are dynamic, not static.
The Step Response Test checks the valve assembly's response to a changing input signal and plots travel versus time. The end results of this test allow you to evaluate the dynamic performance of the valve. The Performance Step Test provides a standardized step test with which to evaluate your valve performance. It utilizes small, medium and large changes.
Advanced Diagnostics are performed with ValveLink software. The valve must be out of service for Advanced Diagnostics to be performed.

Fieldbus Diagnostics

Fieldbus Diagnostics capabilities include the following diagnostics:

• Key Valve Parameters

The key valve parameters allow you to monitor the total valve stem travel (travel accumulation) and the number of stem travel reversals (cycles).

• Instrument Health Parameters

The instrument health parameters alert you if there are any problems with the instrument memory, processor, or sensors. Should a problem occur, you can define how the instrument will react to the problem. You can also select which problems will cause the instrument to shutdown. These indicators may be reported as alerts. Monitoring these alerts can give you an instant indication of any problems with the instrument or the valve assembly.

PlantWeb Alerts

The DVC6000f provides two levels of alerts; Instrument alerts and PlantWeb alerts.
Instrument alerts, when enabled, detect many operational and performance issues that may be of interest. To view these alerts, the user must open the appropriate status screen for a specific device host such as DeltaV, ValveLink software or a Field Communicator.
Some instrument alerts can also be used to trigger PlantWeb alerts that will be reported in Failed, Maintenance or Advisory categories, as configured by the user (refer to figure 3). PlantWeb alerts, when enabled, are visible through the DeltaV alarm interface tools, such as the alarm banner and the alarm summary object.
When a PlantWeb alert occurs, the DVC6000f sends an event notification and waits a specified period of time for an acknowledgment to be received. This occurs even if the condition that caused the alert no longer exists. If the acknowledgment is not received within the pre-specified time-out period, the event notification is retransmitted. This reduces the possibility of alert messages getting lost.

ValveLink Software

ValveLink software is a Windows®-based software package that allows easy access to the information available from DVC6000f digital valve controllers.
Using ValveLink software, you can monitor the performance characteristics of the valve and obtain vital information without having to pull the valve from the line. Performance Diagnostic tests, including On-Line Friction, Deadband Analysis and Trending can be run while the valve is in service and operating. Valve Signature, Dynamic Error Band, and Step Response are displayed in an intuitive user-friendly environment that allows easy interpretation of data.
Diagnostic graphs can be superimposed over those previously stored to view areas of valve degradation. This allows plant personnel to concentrate efforts on equipment that needs repair, avoiding unnecessary maintenance. This diagnostic capability is readily accessible and available to you either in the control room or on the plant floor. In addition to the diagnostic features, ValveLink software contains an Audit Trail, Batch Runner for automating repetitive tasks, and Trending to view valve performance.
ValveLink software provides integration into AMSTM and DeltaV systems, with HARTTM and fieldbus communications.

Field Communicator

You can perform configuration and calibration at the valve or anywhere on the two-wire loop via a Field Communicator (figure 6). Powerful tools such as the Setup Wizard and Auto Travel Calibration automate the tasks of commissioning DVC6000f digital valve controllers. These automation tools not only save time, but also provide accurate and repeatable results.

• Standard Control
• Fieldbus Control
• Fieldbus Logic

• Performance Diagnostics
• Advanced Diagnostics
• Fieldbus Diagnostics

Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, or maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and end user.