Establishing Multidrop Communication - Emerson Rosemount 3051 Manual

Configuration
March 2023
The transmitter accesses information other than dynamic transmitter data through the
normal poll/response method of HART Communication. A communication device or the
control system may request any of the information that is normally available while the
transmitter is in Burst mode. Between each message sent by the transmitter, a short pause
allows the communication device to initiate a request.
Message content options:
Cmd 1
Cmd 2
Cmd 3
Cmd 9
Cmd 33
Cmd 48
Trigger mode options:
• Continuous
• Rising
• Falling
• Windowed
• On change
NOTICE
Consult host system manufacturer for Burst mode requirements.
2.11.1 Configure burst mode using a communication device
Procedure
Go to Device Settings → Output (or Communication) → HART → Burst Mode Configuration.
2.12

Establishing multidrop communication

Multidrop communication refers to the connection of several transmitters to a single
communications transmission line. Communication between the host and the transmitters
takes place digitally with the analog output of the transmitters deactivated.
To install multidrop communication, you must consider the update rate necessary
from each transmitter, the combination of transmitter models, and the length of the
transmission line. You can communicate with transmitters with HART
host implementing HART protocol. Each transmitter is identified by a unique address
and responds to the commands defined in the HART protocol. Field Communicators, the
Asset Management Solutions (AMS) Device Manager, and the AMS Device Configurator
Bluetooth
they do for a transmitter in a standard point-to-point installation.
Figure 2-17
diagram.
40
Read Primary Variable
Read Percent Range/Current
Read Dynamic Variables/Current
Read Device Variables with Status
Read Device Variables
Read Additional Device Status
app can test, configure, and format a multidropped transmitter the same way
®
shows a typical multidrop network. This figure is not intended as an installation
Manual
00809-0100-4007
modems and a
®
Rosemount 3051