Fisher FIELDVUE DVC2000 Configuration guide

www.Fisher.com
HARTrField Device Specification
Fisher™FIELDVUE™DVC2000 Digital Valve
Controller
HART Revision Device Type Device Revision Firmware Revision
HART 5 05 1 1, 2, 3, 4, 5, 6
Introduction 2.................................
Product Overview 2............................
Purpose of this document 2.....................
Abbreviations and definitions 2..................
Reference Documentation 3....................
Device Identification 3..........................
Product Interfaces 4............................
Control Valve Interface 4.......................
Host interface 4...............................
Output Options Circuit 5.......................
Local User Interface 5..........................
Write Protection 5.............................
Firmware and Language Pack Upgrade 5..........
Dynamic Variables 6............................
Device Variables 6..............................
Status Information 7............................
Device Status 7...............................
Universal Commands 8..........................
CommonPractice Commands 13.................
Supported Commands 13......................
Device-Specific Commands 20....................
Burst Mode 20................................
Catch Device Variable 20.......................
Performance 20................................
Annex A Compatibility Checklist 21................
Annex B DVC2000 Parameters as part
of a Rosemountr1410/1420 WirelessHARTr
Gateway 22...............................
Instruction Manual Supplement
D103783X012
DVC2000 Digital Valve Controller
September 2017
Note
This document does not include the DVC2000 AC product (Device Type 13F5) which only supports Device Specific HART
Commands and not Universal or Common Practice Commands.
W8755

Instruction Manual Supplement
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September 2017
2
Introduction
Product Overview
The DVC2000 digital valve controller is a communicating, microprocessor-based current-to-pneumatic valve
positioner. It is designed to replace standard pneumatic and electro-pneumatic valve positioners.
In addition to the traditional function of converting an input current signal (4-20 mA) to a pneumatic output pressure,
the DVC2000 digital valve controller communicates via a local display panel and/or via the HART protocol. An option is
available which provides isolated circuitry for two (2) integrated limit switches (for open/close valve indication) and a
valve position transmitter (for separate valve position feedback).
Purpose of this document
This specification is designed to be a technical reference for HART capable host application developers, system
integrators and knowledgeable end-users. It also provides functional specifications (e.g., commands, enumerations
and performance requirements) used during field device development, maintenance and testing. This document
assumes the reader is familiar with HART Protocol requirements and terminology. Additional product information is
available in DVC2000 product literature, available from Emerson Automation Solutions.
Abbreviations and definitions
AR Alert Record
Configuration
Variables
Variables which represent nonvolatile values of manufacturinginitialized data or userspecified
configuration information. These variables cannot be enumerated via Command 54 and as such
stand on their own with no associated units or range information.
Device Variable
Measured variables that are exposed to HART and can be enumerated using Command 54.
Generally there are variables whose ID is in the range of 0 to 10 and are associated with units
codes, status, and range values.
Enumeration A pre-defined set of values or text.
MV Measured Variable, a physical input to the instrument.
NV Named Variable – a logical point inside the device, hardmapped to a given MV as the source of
NV data.
Point A term that applies to diagnostic data packets. It is defined as a collection of periodically sampled
variables captured at a single instant in time. It does not include the “Monitor” point.
PS1 The PORT A output pressure which increases with increasing drive signal.
PS2 The PORT B output pressure which decreases with increasing drive signal.
PST Partial Stroke Test, a limited form of ramped valve diagnostic.
Byte An 8bit unsigned integer.
Word A 16bit unsigned integer.
Float Refers to the IEEE 754 floating point format.
Packed ASCII A special form of characters defined by HART in which 6bit ASCII characters are packed into byte
data.
Standard Span
Format
A proprietary 16bit integer format for numerical values used by some of this device’s Device
Specific commands.

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Reference Documentation
HART Smart Communications Protocol Specification Revision 5; a group of documents specifying the HART
Communication Protocol, physical layers, and Data Link Layers as defined by the HART Communications Foundation.
Bulletin 62.1:DVC2000 Fisher FIELDVUE DVC2000 Digital Valve Controller (D103167X012)
Fisher FIELDVUE DVC2000 Digital Valve Controllers Quick Start Guide (D103203X012)
Fisher FIELDVUE DVC2000 Digital Valve Controller Instruction Manual (D103176X012)
Device Identification
Manufacturer Name Fisher Controls Model Name(s) DVC2000
Manufacture ID Code 19 (13 Hex) Device Type Code 5(05 Hex)
HART Protocol Revision 5Device Revision 1
User Selectable HART Revision
between HART 5 and HART 7 No
Number of Device Variables 8
Physical Layers Supported FSK
Physical Device Category Valve Positioner

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Product Interfaces
Control Valve Interface
The DVC2000 digital valve controller is mechanically attached to the valve’s actuator by means of a mounting bracket.
The control valve's position is conveyed to the travel sensor of the DVC2000 digital valve controller by means of the
feedback bracket and magnet assembly attached to the actuator’s stem or rotating travel sensor.
MAGNET ASSEMBLY
(ATTACHED TO
VALVE STEM)
Pneumatic tubing connected to the DVC2000 brings instrument supply air to the DVC2000 and takes controlled
output air from the DVC2000 to the actuator. A pressure sensor in the DVC2000 measures the pressure signal and
presents it as a device variable.
Host interface
The input to the DVC2000 can either be twowire 4to20 mA current loop (in pointtopoint mode). This input is
connected in the DVC2000’s terminal box on two terminals marked “LOOP +” and “LOOP ”. Refer to the DVC2000
quick start guide for connection details.

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Output Options Circuit
All three options circuits (transmitter, switch 1 and switch 2) control current from an external power source similar to
the operation of a 2-wire transmitter.
Limit Switches
On units that are supplied with integral limit switches, additional terminals provide the field wiring connection point.
The limit switches are isolated from each other and from the digital valve controller's primary feedback. If only one
switch is to be used, you must use channel 1. Although electrically isolated per Intrinsic Safety requirements, channel 2
derives its power from channel 1. Therefore channel 2 cannot be used alone.
Position Transmitter
On units that are supplied with an integral valve position transmitter, additional terminals provide the field wiring
connection point. The position transmitter circuit in the DVC2000 derives it's operating power from the 4-20 mA
control system input in the same manner as a 2-wire transmitter. In addition, the transmitter function gets position
information (through an opto-isolator) from the digital valve controller so the 4-20 mA position control loop must also
be powered in order for the position transmitter to provide an output representing the valve position.
Local User Interface
The local user interface is available on all DVC2000 digital valve controllers. The interface consists of a liquid crystal
display, four pushbuttons, and a switch for position transmitter configuration. The DVC2000 is supplied with one of
three different language packs preinstalled, depending on the firmware revision and ordering option.
Refer to the DVC2000 instruction manual for additional details on using the Local User Interface to configure and
calibrate the DVC2000.
Write Protection
There are two Write Protection states for the DVC2000: Not Protected or Protected. Protected prevents configuration
and calibration changes to the instrument. The default setting is Not Protected. Protection is controlled under
software control.
Firmware and Language Pack Upgrade
The firmware and language pack of any DVC2000 can be upgraded to the latest version using the “Firmware
Download” tool in ValveLink™ software. The new firmware incorporates all of the new functionality and corrections
and improvements made to the technology of the DVC2000 product.
The firmware download process requires:
D Around 30 minutes to complete
D The DVC2000's instrument mode must be “Out of Service”
D The DVC2000 is powered with 12 mA or greater
D That you isolate the valve from the process and equalize pressure on both sides of the valve or bleed off the
process fluid because the routine will cause the DVC2000 to restart.

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Dynamic Variables
Four Dynamic Variables are implemented.
Default Meaning Units
PV Analog Input mA, %
SV Travel Setpoint %
TV Pressure PSI, BAR, KPA
FV Travel %
Device Variables
These variables represent measurements taken by the device, are read only values, and are all in float format. These
can be read with Commands 33 and 54.
Variable ID Meaning Units
0Analog Input mA, %
2Pressure Port A PSI, BAR, KPA
3 Travel %
4Drive Signal %
6Travel Setpoint %
9Implied Valve Position (Travel Target) %
10 Primary Feedback (user selected, either Travel or Pressure) %
211 Temperature _C or _F
Unit Codes
Variable Units Code Units
0No Units
6Pounds per square inch, psi
7 Bar
10 ($0A) Kilograms per square centimeter, kg/cm2
12 ($0C) Kilopascals, kPa
32 ($20) Celsius, _C
33 ($21) Fahrenheit, _F
39 ($27) Milliamps, mA
57 ($39) Percent, %

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Status Information
Device Status
The Field Device Status Byte is the only status byte defined in the HART protocol. The order and meaning of each of the
eight bits within the byte are fixed by the protocol. This byte is one of the status bytes included with each HART
response. It is not part of the Command 48 data.
Bit Name of Status Bit Meaning
7Field Device Malfunction Set / cleared by the firmware based on self test results. This bit is set if the
position or temperature sensors provide invalid readings.
6Configuration Changed
Two such bits exist internally, one for each HART master. Both copies are set
when any variable, HART message, tag, descriptor or date are changed from
HART. Cleared by command 38, separately for each master. This bit survives
loss of power.
5Cold Start Set by the firmware whenever a HARD RESET sequence is executed or at initial
device power up. Cleared by the first HART command.
4More Status Active when any bit in command 48 is active.
3Analog Input Fixed
Active if the Instrument Mode of the DVC2000 is in the “Out Of Service”
condition or if the Control Mode of the DVC2000 is in one of the digital set
point modes.
2Not Used
1Internal Sensor Out of Limits
(This bit is named “NonPrimary Variable Out Of Limits” in the HART
documentation for transmitters. It has been renamed to reflect the fact that
these variables are INTERNAL INPUTS to FIELDVUE products). The firmware sets
this bit when any sensor (pressure, position, temperature) exceeds its operating
limits.
0Loop Current Out of Range Set when any variable 0 (Analog Input) is saturated.

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Universal Commands
The DVC2000 field device implements all HART Revision 5 Universal Commands.
Command 0: Read Unique Identifier
Command 1: Read Primary Variable
Command 2: Read P.V. Current and Percent of Range
Command 3: Read Dynamic Variables and P.V. Current
Command 6: Write Polling Address
Command 11: Read Unique Identifier Associated with Tag
Command 12: Read Message
Command 13: Read Tag, Descriptor, Date
Command 14: Read Primary Variable Transducer Information
Command 15: Read Primary Variable Output Information
Command 16: Read Final Assembly Number
Command 17: Write Message
Command 18: Write Tag, Descriptor, Date
Command 19: Write Final Assembly Number

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Command 0: Read Unique Identifiers
Byte Description Format Value
Request
Data Bytes none
Response
Data Bytes
0Data type expansion code Byte, hex $FE
1Manufacturer identification code Byte, hex $13
2Manufacturer’s Device Type code Byte, hex $03
3Number of preambles Byte, hex $05
4Universal command revision Byte, hex $05
5Device revision Byte, hex $01
6Software revision Byte, unsigned integer See table 1 below
7Hardware revision Byte, unsigned integer See table 2 below
8Device function flags Not Used $00
9Device Identification number 3 Bytes, hex
Code Description
Command
Specific
Response
Codes
none
Table 1. Device and Software Revision
Device Revision Software Revision Description
$01
$01 Firmware Revision 1
$02 Firmware Revision 2
$03 Firmware Revision 3
$04 Firmware Revision 4
$05 Firmware Revision 5
$06 Firmware Revision 6
Table 2. Hardware Revision
Hardware Revision Description
$08 Hardware Revision 1
$11 Hardware Revision 2

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Command 1: Read Primary Variable
This command reads the value of the DVC2000’s Primary Variable, which is Analog Input (loop current). The units are
either “mA” or “%” as configured in the device by Command 44.
Byte Format Description
Request
Data Bytes none
Response
Data B
y
tes
0Byte, hex Primary Variable Unit Code, either 39 (mA) or 57(%)
14 Float Primary Variable value
Code Class Description
Command
Specific
Response
Codes
none
Command 2: Read Primary Variable and Percent of Range
This command reads the value of the DVC2000’s loop current in implied units of “mA” (regardless of the configured
setting by Command #44) and the measured Valve Travel in implied units of “%”.
Byte Format Description
Request
Data Bytes none
Response
Data B
y
tes
03 Float Loop Current
47 Float Valve Travel
Code Class Description
Command
Specific
Response
Codes
none

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Command 3: Read Dynamic Variables and Loop Current
This command is used to read the value of Loop Current and the four Dynamic Variables. The four dynamic variables
returned depend upon the variable assignment as defined by Command 51 and read back via Command 50.
The default Dynamic Variable assignment and the Variable Units Codes are shown on page 6.
Byte Format Description
Request
Data Bytes none
Response
Data Bytes
03 Float Loop Current (implied units of “mA”)
4Byte, hex Primary Variable (PV) units code
58 Float Primary Variable (PV) value
9Byte, hex Secondary Variable (SV) units code
1013 Float Secondary Variable (SV) value
14 Byte, hex Tertiary Variable (TV) units code
1518 Float Tertiary Variable (TV) value
19 Byte, hex Fourth Variable (FV or QV) units code
2023 Float Fourth Variable (FV or QV) value
Code Class Description
Command
Specific
Response
Codes
8Warning – Value read invalid (one of the variables is out of range)
Command 14: Read Primary Variable Transducer Information
The transducer limits reported in this command indicate that these values are set to “Not Used”
Note
The Transducer Serial Number is not applicable to the DVC2000 and is set to “0”. The other parameters will be set to “0x7F”,
“0xA0”, “0x00”, or “250” Not Used , when they are not applicable.
Byte Format Description Returned Value
Request
Data bytes None
Response
Data
Bytes
02 UINT24 Transducer Serial Number 000000
3 Enum Transducer Limits and Minimum Span Units Code 250 (Not Used)
47 Float Upper Transducer Limit 7FA00000 (Not A Number NAN)
811 Float Lower Transducer Limit 7FA00000 (Not A Number NAN)
1215 Float Minimum Span 7FA00000 (Not A Number NAN)
Code Class Description
Response
Codes None

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Command 15: Read Primary Variable Output Information
This command returns the upper/lower range values for the primary variable which is defined to be the loop current
signal. These are the loop current values for the ends of physical travel, and are used to derive set point from the loop
current. It reports the range supplied in Command 35.
For example, the lower range, for an increase to open valve, will be the current which will produce a 0% set point.
However, for an increase to close valve, the lower range will be the loop current for a 100% set point.
The range values can be changed via Command 35.
The DVC2000 assumes 0% = 4mA and 100% = 20mA.
Byte Format Description Returned Value
Request
Data bytes None
Response
Data
Bytes
0 Enum
PV Alarm Selection Code (see Common Table 6, Alarm
Selection Codes). The Alarm Selection Code indicates the
action taken by the device under error conditions. For
Actuators, the action taken by the positioner is indicated.
250 (Not Used)
1 Enum
PV Transfer Function Code (see Common Table 3, Transfer
Function Codes). The Transfer Function Code must return
“0”, Linear, if transfer functions are not supported by the
device.
250 (Not Used)
2 Enum AI Upper and Lower Range Values Units Code, as supplied
in command 35. From CMD 35
3-6 Float AI Upper Range Value From CMD 35
7-10 Float AI Lower Range Value From CMD 35
1114 Float PV Damping Value (units of seconds) 0.0
15 Enum Write Protect Code (0=Disabled, 1=Enabled) 0 or 1
16 Enum Reserved. Must be set to “250”, Not Used. 250
Code Class Description
Response
Codes None

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CommonPractice Commands
The DVC2000 field device supports the following common practice commands:
Supported Commands
Command 33: Read Device Variables
Command 35: Write Primary Variable Range Values
Command 38: Reset Configuration Change Flag
Command 42: Master Reset
Command 44: Change Primary Variable Units Code
Command 48: Read Additional Status
Command 50: Read Dynamic Variable Assignments
Command 54: Read Device Variable Information
Command 108: Write Burst Mode Command Number
Command 109: Burst Control Mode
Command 33: Read Device Variables
This command is used to read the value of up to four selected Device Variables.
The Device Variables and the Variable Units Code are listed on page 6.
Note: If any one of the requested variable IDs is invalid, the INVALID_SELECTION error will be returned along with no
data bytes.
Byte Format Description Allowable choices
Request
Data Bytes
0Variable ID Variable assigned to slot #0 See Device Variables on page 6
1Variable ID Variable assigned to slot #1 See Device Variables on page 6
2Variable ID Variable assigned to slot #2 See Device Variables on page 6
3Variable ID Variable assigned to slot #3 See Device Variables on page 6
Response
Data Bytes
0Variable ID Variable assigned to slot #0
1Byte, hex Slot #0 Variable units code
25 Float Slot #0 Variable value
6Variable ID Variable assigned to slot #1
7Byte, hex Slot #1 Variable units code
811 Float Slot #1 Variable value
12 Variable ID Variable assigned to slot #2
13 Byte, hex Slot #2 Variable units code
1417 Float Slot #2 Variable value
18 Variable ID Variable assigned to slot #3
19 Byte, hex Slot #3 Variable units code
2023 Float Slot #3 Variable value
Code Class Description
Command
Specific
Response
Codes
2Invalid selection – Invalid Variable ID (see note above)

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Command 35: Write Primary Variable Range Values
In the DVC2000, the Primary Variable is defined to be the Analog Input (loop current).
This command is used to write the ranging values reported in Command 15. It controls how the DVC2000 interprets
the loop current when creating the Travel Target. The upper range must be greater than the lower range.
This command does not do units conversion, but requires that the units code supplied match the PV units configured
in the device as set by Command 44.
If the range values are in percent, then they are assumed to be percent of 420 mA. For example, to range an increase
to open unit from 8 mA to 16 mA, but using percent range numbers, specify lower_range = 25% and upper_range =
75%.
This ranging is done in conjunction with the zero power condition. For an Increase to Open valve, the lower range is
the 0% setpoint level (valve plug in the valve seat), while the upper range is the 100% setpoint level. An Increase to
Close valve is exactly opposite.
This command will be accepted when the DVC2000’s Instrument Mode is In Service but will be rejected if Write
Protection is in effect.
Byte Format Description Allowable choices
Request
Data Bytes
0 UINT8 Upper and Lower Range Values Unit Code Unit Code 39 (mA) or 57(%)
1  4 Float Primary Variable Upper Range Value
5  8 Float Primary Variable Lower Range Value
Response
Data Bytes
0 UINT8 Upper and Lower Range Values Unit Code Unit Code 39 (mA) or 57(%)
1  4 Float Primary Variable Upper Range Value
5  8 Float Primary Variable Lower Range Value
Code Class Description
Command
Specific
Response
Codes
2Invalid selection  Units code did not match configured units
7In Write Protect Mode
16 Access Restricted  other master has access locked.
32 Busy
Command 38: Reset Configuration Change Flag
Resets the configuration changed flag in the DVC2000.
The DVC2000 contains two configuration changed bits, one for each master. Both bits are set when any write
operation occurs. This command clears the bit corresponding to the master sending this command, leaving the other
bit unmodified. Any write to the DVC2000 other than digital setpoint values and write protect status will cause the
configuration change flag to be set.
Byte Format Description
Request
Data Bytes none
Response
Data Bytes none
Code Class Description
Command
Specific
Response
Codes
none

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Command 42: Perform Master Reset
This reset command has two options. If no data bytes are supplied, respond immediately and then perform a “warm”
reset. This is not equivalent to power up in that restart modes and default IVP are not adopted and the realtime clock
is not reset. All other data is read from nonvolatile memory and put into effect. The second option is hard reset. This
requires two data bytes set as described below. If this form is received, the unit will save modes and counters, then
execute a hard reset by exercising the watchdog timer. The next response will have the “cold_start” bit set.
A “soft reset” command will be honored while the DVC2000 Instrument Mode is in the “In Service” condition.
A “hard reset” command requires the DVC2000 Instrument Mode be in the “OutofService” condition.
Byte Format Description
Request
Data
bytes
0  1 Uint16 [Optional] If hex 0x6969 is supplied as request data bytes, a hard
reset is performed. Otherwise a soft reset is performed.
Response
Data
Bytes
None
Code Class Description
Command
specific
Response
Codes
16 Error Access Restricted
Command 44: Change Primary Variable Units Code
This command is issued to change the units of the Primary Variable, which is defined in the DVC2000 as the Analog
Input (loop current). The choices for units are Percent (code 57) or Milliamps (code 39). This command should be sent
prior to a Command 35 which sets the upper and lower Primary Variable range values.
In addition to changing the units code, execution of this command will also change the DVC2000’s Analog Input
Upper and Lower Range values to reflect the new units (For example: When the DVC2000’s Analog Input is configured
as “420 mA” and Command 44 with request Data Byte 57 is executed, the DVC2000’s Analog Input units and range
values will change to “0100%”. Likewise When the DVC2000’s Analog Input is configured as “0100%” and Command
44 with request Data Byte 39 is executed, the DVC2000’s Analog Input units and range values will change to “420
mA”.).
This command will be accepted when the DVC2000’s Instrument Mode is In Service, but will be rejected if Write
Protection is in effect.
Byte Format Description Allowable choices
Request
Data Bytes 0 UINT8 Primary Variable Units Code Unit Code 39 (mA) or 57(%)
Response
Data Bytes 0 UINT8 Primary Variable Units Code Unit Code 39 (mA) or 57(%)
Code Class Description
Command
Specific
Response
Codes
2Invalid selection  Units code did not match configured units
7In Write Protect Mode

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Command 48: Read Additional Status
Byte Format Description
Request
Data
bytes
0 None
Response
Data
Bytes
0 Uint8 Command 48 Response Byte 0
1 Uint8 Command 48 Response Byte 1
2 Uint8 Command 48 Response Byte 2
3 Uint8 Command 48 Response Byte 3
4 Uint8 Command 48 Response Byte 4
5 Uint8 Command 48 Response Byte 5
6 Uint8 Reserved
7 Uint8 Reserved

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Additional Device Status
Command 48 returns 8 bytes of data, with the following status information:
Byte Bit Name of Status Bit Meaning
0
7Flash Integrity Failure 1,2 Active if there is a failure associated with flash ROM (read only
memory).
6Temperature Compensation
Data Integrity Error 1,2 Active if the microprocessor detects a fault in the temperature compensation data.
5Reference Voltage Failure 1,2 Active if there is a failure associated with the internal voltage
reference.
4Drive Current Failure 1,2 Active when the drive current to the I/P converter is not flowing as
expected.
3Critical NVM Failure 1,2 Active if there is a failure of nonvolatile memory used for
configuration data critical for instrument operation.
2Temperature Sensor Failure 1,2 Active when the instrument temperature sensor fails or the sensor
reading is outside of the range of 60° to 100°C (76° to 212°F).
1Pressure Sensor Failure 2Active if the pressure sensor reading is outside the range of 24.0%
to 125.0% of the calibrated pressure for more than 60 seconds.
0Travel Sensor Failure 1,2 Active if the sensed travel is outside the range of 25.0% to 125.0%
of calibrated travel.
1
7Alert Record Not Empty Alert 2Active when there are 1 or more alerts stored in the alert record.
6AutoTune in Progress 2Active if AutoTune Routine is in progress.
5Calibration In Progress Alert 2Active when calibration is in progress.
4Diagnostics in Progress Alert 2Active when a diagnostic test is in progress.
3Pressure Fallback Active Alert Active when the instrument has detected a problem with the travel
feedback and is now controlling the output like an I/P transducer.
2Custom Characterization Custom Characterization in Effect active if the user-defined Custom
Characterization is enabled.
1Input Characterization Input Characterization in Effect active if any of the user-defined
Characterizations other than “Linear” is enabled.
0Auto Cal in Progress Alert 2Active when auto calibration is in progress.
2
7 Reserved
6 Reserved
5Cycle Counter Alert 2Active if the Cycle Counter exceeds the Cycle Count Alert Point.
4Travel Accumulator High
Alert 2Active if the Travel Accumulator exceeds the Travel Accumulator Alert Point.
3Instrument Time is Invalid
Alert
Active if the instrument has been powered down since the last time
the instrument clock was set.
2Alert Record Full Alert 2Active when the alert record contains the maximum number of 20
alerts.
1Offline / Failed Alert 2Active if a shutdown alert has put the DVC2000 in a failed state.
0 Reserved
"Reserved" bits are always set to 0.
1. Sets “Field Device Malfunction”.
2. Sets “More Status Available”.
(continued)

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Additional Device Status
Byte Bit Name of Status Bit Meaning
3
7 Reserved
6 Reserved
5 Reserved
4 Reserved
3 Reserved
2 Reserved
1Integrator Saturated High
Alert
Active if the instrument integrator is saturated at the high
extreme.
0Integrator Saturated Low
Alert 2Active if the instrument integrator is saturated at the low extreme.
4
7Travel Alert Lo 2Active when the Travel is below the Travel Alert Lo Point.
6Travel Alert Lo Lo 2Active when the Travel is below the Travel Alert Lo Lo Point.
5Travel Alert Hi 2Active when the Travel exceeds the Travel Alert Hi Point.
4Travel Alert Hi Hi 2Active when the Travel exceeds the Travel Alert Hi Hi Point.
3Travel Deviation Alert 2
Active if the difference between the Travel Target and the Travel
exceeds the Travel Deviation Alert Point for more than the Travel
Deviation Time.
2Travel Limit/Cutoff Hi Alert Active when the Travel exceeds the Hi Limit/Cutoff Point.
1Travel Limit/Cutoff Lo Alert Active when the Travel falls below the Lo Limit/Cutoff Point.
0Drive Signal Alert 2Active when the Drive Signal exceeds target limits (<10% or
>90%) for more than 20 seconds when not in Cutoff condition.
5
7 Reserved
6 Reserved
5 Reserved
4 Reserved
3 Reserved
2Option Module Error
1Limit Switch 2 Status Set to “1” if Limit Switch 2 is enabled, powered, and closed.
0Limit Switch 1 Status Set to “1” if Limit Switch 1 is enabled, powered, and closed.
6
7 Reserved
6 Reserved
5 Reserved
4 Reserved
3 Reserved
2 Reserved
1 Reserved
0 Reserved
"Reserved" bits are always set to 0.
1. Sets “Field Device Malfunction”.
2. Sets “More Status Available”.

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Command 50: Read Dynamic Variable Assignments
This command returns a list of four device variable codes taken from table DVC Device Variables which are returned in
Command 3. These Dynamic Variables are fixed and control the Command 3 response, whether burst or by request.
Byte Format Description
Request
Data Bytes None
Response
Data Bytes
0 UINT8 ID of variable returned as the first variable (PV) in Command #3
1 UINT8 ID of variable returned as the second variable (SV) in Command #3
2 UINT8 ID of variable returned as the third variable (TV) in Command #3
3 UINT8 ID of variable returned as the fourth variable (FV) in Command #3
Code Class Description
Command
Specific
Response
Codes
None
Command 54: Read Device Variable Information
Used to identify each of the Device Variables in the range of IDs 0…10 inclusive and 211. Responds with the Sensor
Serial Number, Sensor range Units, Sensor ranges, Damping Value, and Minimum Span of the selected Variable. The
Variable range values will be in the same units as the Variable Units.
Byte Format Description
Request Data
Bytes 0 Enum Device Variable ID, this command is applicable to variables 010 or 211. All others will return invalid selection
Response
Data Bytes
0 UINT8 Device Variable ID
13 Device Variable Sensor Serial Number, 24bit number
(NOT USED  always zero)
4 UINT8 Device variable units code
58 Float Device Variable Upper Range
912 Float Device Variable Lower Range
1316 Float Device Variable Damping Value,
(NOT USED  always zero)
1720 Float Device Variable Minimum Span (NOT USED  always zero)
Code Class Description
Command
Specific
Response
Codes
2Invalid Selection

Instruction Manual Supplement
D103783X012
DVC2000 Digital Valve Controller
September 2017
20
Device-Specific Commands
The DVC2000 field device supports devicespecific commands. However, these devicespecific commands require use
of the ValveLink software application or DD methods and cannot be utilized outside of those controlled environments.
Burst Mode
This field device supports Burst Mode.
Catch Device Variable
This field device does not support Catch Device Variable.
Performance
Refer to the DVC2000 Instruction Manual (D103176X012) or Product Bulletin 62.1:DVC2000 (D103167X012) for
details on DVC2000 performance.