Emerson 5400 User Manual

00809-0500-4530, Rev AA
October 2010

1-3

Rosemount 5300/5400 Series

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.

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.