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2. What is Fieldbus?
2.3. Fieldbus Terms
30
Experion PKS Series A Fieldbus Interface Module User's Guide
R400
Honeywell
July
2010
Term Abbreviation
Description
DD Synthesizer
A tool supplied by the Fieldbus Foundation. It
combines incremental DDs, with unresolved
references, with Fieldbus Foundation standard DDs to
produce a complete/full DD that can be used with
DDS.
Enhanced Device
Description
EDD
A newer version of the binary file (*.ff5) that provides
the definition for parameters in the FBAP of a device.
For example, what Function Blocks a device contains,
and what parameters are in those blocks.
Enhanced Device
Description
Language
EDDL
The language that vendors use to define their device's
Function blocks and parameters.
Fieldbus Foundation
Object
FFO or FF5
The suffix name for the complete/full DD binary file.
Fieldbus Foundation
Tokenizer
A Fieldbus Foundation tool that converts an ASCII text
file written in conformance with the Device Description
Language specification into a DD binary file.
H1 Fieldbus
Segment
An independent electrical environment consisting of
wire, terminators and a power source per IEC 61158-
1/ISA S50.1 for supporting fieldbus devices.
H1 Fieldbus Link
The logical medium by which H1 Fieldbus devices are
interconnected. It is composed of one or more physical
segments interconnected by bus Repeaters or
Couplers. All of the devices on a link share a common
schedule, which is administered by that link's current
LAS.
Object Dictionary
OD
Contains the Object Descriptions for communication
objects such as DataType,
DataTypeStructureDescription, and SimpleVariable.
Production Rules
The grammar, in BNF format, used to describe a
language. The Common File Format used to construct
the Resource file follows specific production rules.
Release Directory
A directory structure used to store the DD and related
files. Each manufacturer has a directory name that is
the registered manufacturer ID number. There is a
directory for each device type that a manufacturer
produces under their ID directory.
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