Emerson 5400 User Manual

00809-0500-4530, Rev AA
October 2010

1-17

Rosemount 5300/5400 Series

To configure the 5300/5400 transmitter to communicate with the Host in this 
example, the following text string is written to the HART Slave 1 Message 
Area:

HMC A44 B4800 PO S2.

HMC: These three letters are used for safety and will eliminate the risk of 
changing the configuration data by mistake.

A44: A indicates that the following number is the new address (address 44). 
Leading zeroes are not needed.

B4800: B indicates that the following number is the new baud rate (1200, 
2400, 4800, 9600, 19200).

PO: P identifies the following letter as parity type (O = odd, E = even, and 
N = none).

S2: S indicates that the following figure is the number of stop bits (1 = one, 
2 = two).

Only values that differ from the current values need to be included. For 
example, if only the address is changed, the following text string is written into 
the 5300/5400 (HART Slave 1) Message Area:

HMC A127,

indicates that 127 is the new address.

The default and configurable parameter values can be found in Table 1-6.

Table 1-6.  Levelmaster 
Communication Parameters

To reset the communication parameters to default Levelmaster settings, use 
the following Modbus Message:

Baud Rate

9600

1200, 2400, 4800, 9600, 19200

Start Bits

One

One

Data Bits

Seven

Seven, Eight

Parity

None

None, Odd, Even

Stop Bits

One

One or Two

Address

1

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