1Changing A Transmitter Address - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4107, Rev BA
Figure 2-18. Typical multidrop network (4-20 mA only)
A. HART Modem
B. Power Supply
The Rosemount 2051 is set to address zero (0) at the factory, which allows operation in the
standard point-to-point manner with a 4–20 mA output signal. To activate multidrop
communication, the transmitter address must be changed to a number from 1 to 15 for HART
Revision 5, or 1-63 for HART Revision 7. This change deactivates the 4–20 mA analog output,
sending it to 4 mA. It also disables the failure mode alarm signal, which is controlled by the
upscale/downscale switch position. Failure signals in multidropped transmitters are
communicated through HART messages.
2.11.1 Changing a transmitter address
To activate multidrop communication, the transmitter poll address must be assigned a number
from 1 to 15 for HART Revision 5, and 1-63 for HART Revision 7. Each transmitter in a
multidropped loop must have a unique poll address.
Changing transmitter address using a Field Communicator
From the HOME screen, enter the fast key sequence
Device Dashboard Fast Keys
Configuration
A.
B.
Section 2: Configure
HART Revision 5 HART Revision 7
2, 2, 5, 2, 1 2, 2, 5, 2, 2
April 2013
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