Instruction Manual

Instruction Manual Supplement
D103639X012
DVC6200 Digital Valve Controller
August 2014
2
Introduction
Product Overview
The FIELDVUE DVC6200 digital valve controller is designed to control the pneumatic actuator of a process control
valve. It receives a current signal from a host and uses instrument air supply to create a metered pressure output signal
to the pneumatic actuator. Movement of the actuator as it positions the process control valve is measured by the
DVC6200 travel sensor as its primary feedback. The name plate is located on the bottom side of the DVC6200 master
module assembly and indicates the model name, individual product serial number, and any applicable third party
approvals.
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 DVC6200 product literature, available from Emerson Process Management.
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 13 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.