Dynasonics TFX Ultra Transit Time Flow Meters - Manual (Page 73)

Data
Component Name
MODBUS Registers
Available Units
Long Integer
Format
Floating Point
Single Precision
Format
Double Precision
Format
Signal Strength 40100…40101 40200…40201 40300…40303
Flow Rate 40102…40103 40202…40203 40304…40307 Gallons, Liters, MGallons, Cubic
Feet, Cubic Meters, Acre Feet, Oil
Barrel, Liquid Barrel, Feet, Meters,
Lb, Kg, BTU, MBTU, MMBTU, TON,
kJ, kW, MW
Per Second, Minute, Hour, Day
Net Totalizer 40104…40105 40204…40205 40308…40311
Positive Totalizer 40106…40107 40206…40207 40312…40315
Negative Totalizer 40108…40109 40208…40209 40316…40319
Temperature 1 40110…40111 40210…40211 40320…40323 ° C
Temperature 2 40112…40113 40212…40213 40324…40327 ° C
Table 14: Flow meter MODBUS register map for ‘Little-endian’ word order master devices
For reference: If the flow meters Net Totalizer = 12345678 hex
Register 40102 would contain 5678 hex (Word Low)
Register 40103 would contain 1234 hex (Word High)
Data
Component Name
MODBUS Registers
Available Units
Long Integer
Format
Floating Point
Single Precision
Format
Double Precision
Format
Signal Strength 40600…40601 40700…40701 40800…40803
Flow Rate 40602…40603 40702…40703 40804…40807 Gallons, Liters, MGallons, Cubic
Feet, Cubic Meters, Acre Feet, Oil
Barrel, Liquid Barrel, Feet, Meters,
Lb, Kg, BTU, MBTU, MMBTU, TON,
kJ, kW, MW
Per Second, Minute, Hour, Day
Net Totalizer 40604…40605 40704…40705 40808…40811
Positive Totalizer 40606…40607 40706…40707 40812…40815
Negative Totalizer
40608…40609 40708…40709 40816…40819
Temperature 1 40610…40611 40710…40711 40820…40823 ° C
Temperature 2 40612…40613 40712…40713 40824…40827 ° C
Table 15: Flow meter MODBUS register map for ‘Big-endian’ word order master devices
For reference: If the flow meters Net Totalizer = 12345678 hex
Register 40602 would contain 1234 hex (Word High)
Register 40603 would contain 5678 hex (Word Low)
Modbus Coil Description Modbus Coil Notes
Reset Totalizers 1
Forcing this coil on will reset all totalizers. After reset, the coil
automatically returns to the off state.
Table 16: MODBUS coil map
COMMUNICATIONS PROTOCOLS
Page 73 March 2014