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Reference Manual
00809-0100-4832, Rev AA
October 2004
3-49
Rosemount 3095FC
Table 3-7. Modbus Registers
4. Enter a Starting Register to represent the first data register in the
address span. Any number from 0 to 65535 is valid. Register
numbers can be duplicated as long as they are in separate Modbus
Function configuration tables. The tables should be numbered from
smallest to largest. For example, the Host device requests the
Starting Register 500 through Ending Register 700. The Starting
Register is 400 and the Ending Register is 700. All register numbers
requested by the Host (500 through 700) are valid and would be
responded because the requested register numbers fall between the
Start and Ending Register numbers (400 through 700).
5. Specify that the Ending Register address is a number representing
the last location of a point's data. The value for this number is
computed by: Ending Register address = (Starting Register address +
Number of Functions) - 1
6. The Device Parameter field denotes the type of data associated with
an address (Starting through Ending Register). When the Host
requests a valid range of register numbers, the Function Code tells
the Slave what to do and between which registers (Starting Register
through Ending Register). The Rosemount User Interface Software
Parameter defines what data is collected or which parameter is set.
Function
Code
Row
Starting
Register
Ending
Register
Device Parameter (s) Indexing Conversion
1 1 1070 1070 N/A Point 0
2 1 0 0 N/A Point 0
3 1 7052 7059 Filtered EUs (Analog Inputs 1-8) Point 0
2 7100 7102 DP, P, Temp Param 0
3 7103 7107 Meter Flow Values - Starting with “Flow Rate/Day,” Ending with “hwPf” Param 0
4 7108 7127 Meter Flow Values - Starting with “Flow Today,” Ending with
“Uncorrected Accumulated”
Param 0
5 7262 7288 Meter Config Parameters - Starting with “Atmospheric Pressure,”
Ending with “Carbon Monoxide”
Param 0
4 1 0 0 N/A Point 0
5 1 1070 1070 N/A Point 0
6 1 7052 7059 Filtered EUs (Analog Inputs 1-8) Point 0
2 7100 7102 DP, P, Temp Param 0
3 7103 7107 Meter Flow Values - Starting with “Flow Rate/Day,” Ending with “hwPf” Param 0
4 7108 7127 Meter Flow Values - Starting with “Flow Today,” Ending with
“Uncorrected Accumulated”
Param 0
5 7262 7288 Meter Config Parameters - Starting with “Atmospheric Pressure,”
Ending with “Carbon Monoxide”
Param 0
15 0 0 0 N/A Point 0
16 1 8000 8053 Meter Config Parameters - Starting with “Point Tag ID,” Ending with
“Low Flow Cutoff”
Param 0
2 8054 8063 All Meter Calibration Parameters - Starting with “Calibration Options) Param 0