Honeywell Series A User Manual page 155

TIP
While the device has been assigned to a link, this is still "offline" configuration
of a matching physical device that is to be connected to this Link.
Each device on the link must have a unique physical device tag (PD_TAG)
that the fieldbus system relates to a node address. The physical device tag,
node address, and the manufacturer device identifier (DEV_ID) are used to
match a configured device to a physical device.
In Experion system, each independent component in the control strategy
must have a unique tag name (NAME). This is automatically enforced
through the Control Builder application. For this reason, the unique name that
was assigned to the device when it was created in project is also assigned as
the device's physical device tag. This is done to assure that the names are
unique within the system. This means a change in NAME results in an
automatic change in PD_TAG to keep them the same. However, a change in
PD_TAG does not result in an automatic change in the assigned NAME.
So, the name and physical device tag can be different. Since it is possible to
change a physical device tag configuration using a handheld communicator,
you must be sure the device name specified on this configuration form
matches the device name configured in the device.
TIP
You can simplify the retrieval of important diagnostic information from any
fieldbus device by configuring meaningful information in the Description field
on the configuration form of all associated transducer and resource blocks in
the Project tab. Operators can quickly trace any device-specific alarms to the
applicable block through the device name and description that is displayed on
the Alarm Summary in Station. This is especially useful for diagnosing
problems in devices with several transducer blocks, like temperature
multiplexers.
Step
R400 Experion PKS Series A Fieldbus Interface Module User's Guide
July 2010
5.4. Configuring Fieldbus Components In a Control Strategy
Action
Honeywell
5. Configuration
Result
155