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Manual Supplement
00809-0500-4530, Rev AA
October 2010
1-3
Rosemount 5300/5400 Series
INTRODUCTION The Rosemount 5300 Series and Rosemount 5400 Series transmitters are
Modbus compatible measurement devices that support communication with a
Remote Terminal Unit (RTU) using a subset of read, write, and diagnostic
commands used by most Modbus compatible host controllers. The
transmitters also support communication through Levelmaster and Modbus
ASCII protocols.
The HART
®
to Modbus Converter (HMC) module is located inside the
Rosemount 5300 and Rosemount 5400 transmitter enclosure and provides
power to and communicates with the transmitter through a HART interface.
Figure 1-1. System Overview
During normal operation, the HMC “mirrors” the contents of process variables
from the 5300/5400 transmitter to the Modbus registers. To configure the
5300/5400 transmitter, it is possible to connect a configuration tool to the
HMC. See “Transmitter Configuration” on page 1-13 for more information.
WORKFLOW Overview of workflow for commissioning a Rosemount 5300 or a Rosemount
5400 transmitter with Modbus protocol:
1. Mount the transmitter on the tank.
2. Connect the power and communication wires.
3. Establish HART communication with the transmitter through Rosemount
Radar Master, or a Field Communicator. This is done by:
• Connecting to the HART terminals, or
• Connecting to the MA/MB terminals (tunneling mode)
4. Configure the transmitter.
5. Configure the Modbus communication.
6. Configure Modbus host.
7. Verify output values as reported by the transmitter.
5300/5400
transmitter
electronics
HART
signals
HART to
Modbus
Converter
Modbus and
Levelmaster
communication
Remote
Terminal
Unit
Rosemount
Radar Master/
Field
Communicator
HART signals
5300/5400 transmitter enclosure