Emerson 5301HxxxxxxxxxxxxxxZZ Series Reference Manual page 151

Reference Manual
00809-0100-4530
Table 5-9: Levelmaster Communication Parameters
Parameter
Parity
Stop Bits
To configure the Rosemount 5300 Level Transmitter to communicate with the host in this
example, the following text string is written to the Modbus message area:
HMC M2 A2 B9600 D7 PN S1.
Note
Include all the parameters when writing to the message area.
Note that an address must be unique on the bus.
HMC
M2
A2
B9600 B indicates that the following number is the new baud rate (1200, 2400, 4800,
D7
PN
S1
Note
Start bits are not configurable and cannot be set.
5.9.5 Modbus ASCII communication setup
The parameter, default, and configurable values are shown in
Table 5-10: Modbus ASCII Communication Parameters
Parameter
Baud Rate
Start Bits
Data Bits
Parity
Stop Bits
Address
Reference Manual
These three letters are used for safety and will eliminate the risk of changing the
configuration data by mistake.
This means that the Levelmaster protocol is to be used.
A indicates that the following is the new address (address 2). Leading zeroes are
not needed.
9600, 19200).
D indicates that the following data bits are to be used (7 = seven, 8 = eight).
P identifies the following letter as parity type (O = odd, E = even, and N = none).
S indicates that the following figure is the number of stop bits (1 = one, 2 = two).
Default value
9600
One
Seven
None
One
1
(continued)
Value
None
One
Table 5-10.
Configurable values
1200, 2400, 4800, 9600,
19200
One
Seven, Eight
None, Odd, even
One or Two
1-255
Configuration
April 2019
151