Honeywell Series A - Page 29

2. What is Fieldbus?
2.3. Fieldbus Terms
R400 Experion PKS Series A Fieldbus Interface Module User's Guide 29
July 2010 Honeywell
Term Abbreviation Description
Device Description
Item
DD Item
Item is a fundamental concept of the Device
Description Language (DDL). It makes up the
description of the device and can be any of the
following constructs:
Array*
Block*
Collection
Domain
Edit Display
Item Array
Menu
Method
Program
Record*
Refresh Relation
Response Code
Variable*
Variable List*
WAO Relation
* These items are of the most interest to Block Type
templates.
Device Description
Language
DDL
The language that vendors use to define their device's
Function blocks and parameters.
Device Description
Object
DDO
The suffix name for incremental DD binary files
supplied by vendors that are to be converted to full and
complete DD binary files by the Fieldbus Foundation
Synthesizer.
Device Description
Service
DDS
A software library developed by the Fieldbus
Foundation that provides a generic access to a DD.