Rosemount 3144 - Information Variables

3-13
On-line Operations
NOTE
Enabling Drift Alert (Step 14) will allow a message to be sent via HART
whenever the maximum acceptable difference between Sensor 1 and
Sensor 2 has been exceeded. Proceed to Step 15 only if you want the
transmitter’s analog signal to go into alarm when Drift Alert is
detected. The Drift Alert alarm cannot be enabled when Hot Backup is
enabled.
15. OPTIONAL—See note above. Select 5 Drift Alarm Status and
select Enable Alarm. Select SEND to download the alarm setting
to the transmitters.
INFORMATION VARIABLES Access the transmitter configuration variables on-line using a HART
communicator or other suitable communications device. The following
is a list of transmitter configuration 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 this variable to
label transmitters electronically according to the requirements of your
application. The tag you define is automatically displayed when a
HART 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.
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 HART
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 HART communicator.
Date Date 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 HART communicator.
Sensor 1 Serial Number The Sensor 1 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.
Sensor 2 Serial Number The Sensor 2 Sensor s/n variable is only available on the Model
3244MV transmitter. It provides a location to list the serial number of a
second sensor.
HART Fast Keys 1,3,1
HART Fast Keys 1,4,4
HART Fast Keys 1,4,4
HART Fast Keys 1,4,4
HART Fast Keys 1,3,6
HART Fast Keys 1,3,8