Establishing Communication With Host Systems; Device Description (Dd); Enhanced Device Description (Edd); Device Type Manager (Dtm) - Honeywell SmartLine RMA800 User Manual

2.3

Establishing communication with host systems

The RMA803 Remote Indicator establishes communication with the host systems using a DD or
DTM.

Device Description (DD)

DD is a binary file that provides the definition for parameters in the FBAP of the RMA803 Remote
Indicator. For example, DD refers to the function blocks that a Remote Indicator contains, and the
corresponding parameters in the blocks that are critical to the interoperability of Fieldbus devices.
They define the data required to establish communications between different Fieldbus devices from
multiple vendors with control system hosts. The DD provides an extended description of each object
in the Virtual Field Device (VFD).
The Fieldbus Foundation provides the DD for all standard function blocks and transducer blocks on
a CD-ROM. The Fieldbus Foundation also provides this information on its website,
www.fieldbus.org.

Enhanced Device Description (EDD)

There are two types of EDDs are available, namely .ff5/.sy5 and .ffo/sym. The.ffo/.sym binary files
are generated for the legacy hosts to load the device DD that is generated using latest tokenizer. Few
constructs like Images that are supported in .ff5/.sy5 binaries, are not supported in .ffo/.sym binary
files.

Device Type Manager (DTM)

DTM is similar to a device driver that enables usage of devices in all the asset management and
device configuration software like FDM, with the help of the FDT-DTM technology.
The DTM has the following primary functions:
•
Provides a graphic user interface for device configuration.
•
Provides device configuration, calibration, and management features for the particular device.
DTM provides functions for accessing device parameters, configuring and operating the devices,
calibrating, and diagnosing problems.
Revision 4 Foundation Fieldbus RMA803 Remote Indicator User's Guide Page 9