Emerson 5300, 5400 specifications Levelmaster Communication Setup, HMC A44 B4800 PO S2, HMC A127

Manual Supplement

00809-0500-4530, Rev AA October 2010

Rosemount 5300/5400 Series

Levelmaster Communication Setup

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	Parameter	Default value	Configurable value
	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	1-99

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

HMC M2

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