Rosemount 248, Справочное руководство

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Reference Manual
00809-0100-4825, Rev BB
August 2005
Rosemount 248
3-8
Information Variables
Access the transmitter information variables on-line using the HART
Communicator or other suitable communications device. The following is a list
of transmitter information variables. These variables include device identifiers,
factory-set configuration variables, and other information. A description of
each variable, the corresponding fast key sequence, and a review of its
purposes are provided.
Tag
The Tag variable is the easiest way to identify and distinguish between
transmitters in multi-transmitter environments. Use it to label transmitters
electronically according to the requirements of the application. The tag
defined is automatically displayed when a 375 Field Communicator
establishes contact with the transmitter at power-up. The tag may be up to
eight characters long and has no impact on the primary variable readings of
the transmitter.
Date
The Date command is a user-defined variable that provides a place to save
the date of the last revision of configuration information. It has no impact on
the operation of the transmitter or the 375 Field Communicator.
Descriptor
The Descriptor variable provides a longer user-defined electronic label to
assist with more specific transmitter identification than is available with the tag
variable. The descriptor may be up to 16 characters long and has no impact
on the operation of the transmitter or the 375 Field Communicator.
Message
The Message variable provides the most specific user-defined means for
identifying individual transmitters in multi-transmitter environments. It allows
for 32 characters of information and is stored with the other configuration
data. The message variable has no impact on the operation of the transmitter
or the 375 Field Communicator.
Sensor Serial Number
The Sensor S/N variable provides a location to list the serial number of the
attached sensor. It is useful for identifying sensors and tracking sensor
calibration information.
Fast Key Sequence 1, 3, 4, 1
Fast Key Sequence 1, 3, 4, 2
Fast Key Sequence 1, 3, 4, 3
Fast Key Sequence 1, 3, 4, 4
Fast Key Sequence 1, 3, 2, 1, 4