User's Manual

11
Remote Modbus Register Mapping
The Flow Totalizer sends data to a SignalFire Telemetry Modbus Gateway. The data that is sent
To the gateway is available at the gateway in registers where it can then be read by a Modbus RTU.
Consequently, the node needs to have a unique (to the network it is in) Modbus slave ID which the
gateway will use to store its unique data.
Modbus Registers
Every check-in period, the sensors are read and data is sent to the gateway. The gateway will save the
data under the set Modbus ID in 16-bit registers. The register map for this system is below.
Register Map
Register
Number
Register
Address
Description
Data
Type
41101
1100
Volume Units (2 = gallons; 3 = barrels)
Int
41102
1101
K-Factor Units (2 = gallons; 3 = barrels)
Int
41103
1102
Time Base Units(3=day, 2=hour, 1=min, 0=second)
Int
41104
1103
Flow Total (High Word)
Float
41105
1104
Flow Total (Low Word)
Float
41106
1105
Yesterday's Flow Total (High Word)
Float
41107
1106
Yesterday's Day Flow Total (Low Word)
Float
41108
1107
Current Day Flow Total (High Word)
Float
41109
1108
Current Day Flow Total (Low Word)
Float
41110
1109
Avg Flow Rate (High Word)
Float
41111
1110
Avg Flow Rate (Low Word)
Float
41112
1111
Instantaneous Flow Rate (High Word)
Float
41113
1112
Instantaneous Flow Rate (Low Word)
Float
41114
1113
Gear Meter K Factor (High Word)
Float
41115
1114
Gear Meter K Factor (Low Word)
Float
49988
9987 or 65524
Major revision number for the mainboard
Int
49989
9988 or 65525
Minor revision number for the mainboard
Int
49990
9989 or 65526
Major revision number for the radio
Int
49991
9990 or 65527
Minor revision number for the radio
Int
49995
9991 or 65528
Received signal strength of last packet from the slave
Signed
Int
49996
9992 or 65529
Battery voltage, in millivolts
Int
49997
9993 or 65530
Minutes until this slave will time out, unless new data is
received
Int
49998
9994 or 65531
Number of registers cached for this slave device
Int
49999
9995 or 65532
Remote device type. 60 for Flow Totalizer
Int
SignalFire Telemetry
Rev 2.4