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Reference Manual
00809-0100-4021, Rev DA
November 2004
Rosemount 3144P
3-2
HART
375 FIELD
COMMUNICATOR
The Menu Tree and Fast Key sequences use the following device revisions:
• Standard 3144P: Device Revision Dev v3, DD v2
• 3144P SIS: Device Revision Dev v2, DD v1
The 375 Field Communicator exchanges information with the transmitter from
the control room, the instrument site, or any wiring termination point in the
loop. To facilitate communication, connect the Field Communicator in parallel
with the transmitter (see Figure 2-10). Use the loop connection ports on the
top of the Field Communicator. The connections are non-polarized. Do not
make connections to the NiCad recharger jack in explosive atmospheres.
Before connecting the Field Communicator in an explosive atmosphere, make
sure the instruments in the loop are installed in accordance with intrinsically
safe or non-incendive field wiring practices
Updating the HART
Communication Software
The 375 Field Communicator software may need to be updated to take
advantage of the additional features available in the 3144P (field device
revision 3). Perform the following steps to determine if an upgrade is
necessary.
1. Choose “Rosemount” from the list of manufacturers and “3144 Temp”
from the list of models.
2. If the Fld Dev Rev choices include “Dev v3, DD v2,” an upgrade is not
required. If the only choice is “Dev v1” or “Dev v2” (with any DD version),
then the communicator should be upgraded. The 3144P SIS Safety
Certified transmitters requires Device Revision Dev v2, DD v1.
NOTE
If communication is initiated with an improved 3144P using a communicator
that only has a previous version of the transmitter device descriptors (DDs),
the communicator will display the following message:
NOTICE: Upgrade to the 375 software to access new XMTR functions.
Continue with old description?
Select YES: the communicator will communicate properly with the transmitter
using the existing transmitter DDs. However, new software features of the DD
in the communicator will not be accessible. I
Select NO: the communicator will default to a generic transmitter functionality.
If YES is selected when the transmitter is already configured to utilize the new
features of the improved transmitters (such as Dual Input configuration or one
of the added sensor input types–DIN Type L or DIN Type U), the user will
experience trouble communicating with the transmitter and will be prompted
to turn the communicator off. To prevent this from happening, either upgrade
the communicator to the latest DD or answer NO to the question above and
default to the generic transmitter functionality.
To see a list of enhancements included in the improved transmitters, see
“Rosemount 3144P and Rosemount 3144 / 3244MV Differences” on
page 1-6.