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Manual Supplement
00809-0500-4530, Rev AA
October 2010
1-19
Rosemount 5300/5400 Series
In Table 1-8 and Table 1-9 is a description of the implemented functions of
Levelmaster protocol in the HMC.
Table 1-8. Implemented Functions
of Levelmaster Protocol
Table 1-9. Letters and Expressions
Used in Previous Tables
Input format Description Output format
UnnN?
Return ID number
UnnNnnCcccc
UnnNmm
Set ID number
UnnNOKCcccc
UnnF?
Return number of floats
UnnFxCcccc
UnnFx?
Set number of floats
UnnFOKCcccc
Unn?
Return floats and other data
UnnDddd.ddFfffEeeee
WwwwCcccc
(1)
(1) In this case, number of floats is set to 1. If number of floats is set to 2, the Output Format
would be: UnnDddd.ddDddd.ddFfffEeeeeWwwwCcccc
NOTE
If one float is sent, it is “Float1”. If two floats are sent, it is “Float 1” before
“Float 0”.
Letter Description
nn
nn is used to identify slave to respond,
nn is a number 00-99 or ** (wildcard).
The EmulCtrl Address Holding register can be configured to a higher
value than 99. In that case, the address will be truncated to 99.
mm
mm is the new ID number for the slave; mm is a number 00-99
.
x
x is the number of floats returned when slave receives Unn?, x is a
number 0-2.
cccc Is the 16 bit CRC checksum, cccc are hexadecimal characters.
ddd.dd
ddd.dd is the distance value from slave 1. Note that the first d can also be
a ‘-’ (minus).
Float 1 Slave 1 PV.
Float 0 Slave 1 SV.
fff The temperature value. Configured by Holding Register 3208 in HMC.
(1)
(1) Any of the four available variables from any of the five HART slaves can be selected as
the temperature source.
The least four significant bits (bit 0-3) select the variable number. Bits 4-7 select the HART
slave address. If invalid values are used, the temperature value will be invalid, with no
Error bit set.
For example, if we want to use FV from HART Slave 3 as temperature source, we have
to write the value 34 Hex (52 decimal).
eeee
An error value.
Bit 0: Invalid SV value (Float 0).
Bit 8: Invalid Temperature value.
Bit 12: Invalid PV value (Float 1)
.
Wwww A warning value, not used in this implementation.