Emerson FIELDVUE DVC6200f, Instruction Manual

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DVC6200f Digital Valve Controller
November 2010 274
Overview
Several support files are required for the DVC6200f
digital valve controller. They are:
Device Description (DD) files—These files
define the data interface to the digital valve controller
(file extensions .sym and .ffo).
Capabilities File—These files allow a host to
configure the control system off-line (e.g., without
having a device physically attached to the host) (file
extension .cff).
DeltaV Registry File—This file is used by
DeltaV to define the device interface (file extension
.reg)
DeltaV fhx File—This file is used by DeltaV to
define the device and the data interface to the device
(file extension .fhx).
DeltaV Windows Resource File—These files
define the user interface for the device for DeltaV and
include the definitions for the transducer block
interface and the resource block interface (file
extension .dll).
The directory structure defined by the Fieldbus
Foundation for device descriptions is as follows:
....\xxxxxx\yyyy\rrddcc.eee
where:
....\ is the path to the DD structure as
implemented by the host system. This is
typically defined as the base path to the DD
since access to the specific device DD is
predefined from the base folder. For a DeltaV
system, the DDs are included with the support
files and are located in a folder named
“amsdevices.” For other hosts, the Fieldbus
Foundation defines a folder named “release”
that is included with the CD-ROM, however,
you do not need to retain this folder name.
xxxxxx is the 6-digit hexadecimal equivalent of the
manufacturer’s identification number as
defined by the Fieldbus Foundation. Fisher
Controls’ ID number is 5100 (or in the folder
format 005100). This number is also stored in
the instrument Resource Block in the
parameter Mfg ID (parameter name
MANUFAC_ID).
yyyy is the 4-digit hexadecimal equivalent of the
device type, as defined by the manufacturer.
For example, the device type for the
DVC6200f digital valve controller is 4602. This
number is stored in the instrument Resource
Block in the parameter Device Type
(parameter name DEV_TYPE).
rr is the 2-digit hexadecimal equivalent of the
device revision, as defined by the
manufacturer. It is stored in the instrument
Resource Block in the parameter Device
Revision (parameter name DEV_REV).
dd is the 2-digit hexadecimal equivalent of the
device description (DD) revision that applies to
the device, as defined by the manufacturer.
The host will always use the latest version of
the DD that it finds for a particular device
revision. When part of the name of a
capabilities file, this value is always the same
as the value of the DD_REV parameter stored
in the Resource Block of the instrument. The
value of the DD_REV parameter represents
the earliest version of the DD that is
compatible with the device revision of the
instrument.
cc is a 2-digit hexadecimal equivalent for the
capabilities files (.cff) revision, as defined by
the manufacturer. The latest revision of the
capabilities files, for a particular device
revision, is the file with the largest value for
this number.
eee is the file extension. At this time, five
extensions exist for files, they are:
.sym—This extension denotes a device
description (DD) symbol file as defined by the
Fieldbus Foundation.
.ffo—This extension denotes a complete,
tokenized, device description for the
instrument as defined by the Fieldbus
Foundation.
.cff—This extension denotes a
capabilities file for the instrument as defined
by the
F
OUNDATION
Fieldbus Common File
Format specification.
.fhx—This extension denotes a DeltaV
device definition file.
.dll—This extension denotes a windows
resource file used by DeltaV.
.reg—This extension denotes a DeltaV
registry file.
.alm—This extension denotes a DeltaV
alarm file (DeltaV version 6 only).
E