27
Multi-Address Support
Multi-Address support allows a register to be read or written to using different byte
orientations specified by the address range. For example, input register 0003 can also
be read at 2003, 4003 and 6003 with different byte orientations as listed in Table 7.
Registers that do not have multi-address support are only available in Big-Endian byte
orientation (Modbus
®
standard).
Float/32bit Values
16Bit Values
Register 1
Register 2
Register 1
Byte Order
Address Range MSB
LSB
MSB
LSB
Big-Endian
Byte Swap
Word Swap
Little-Endian
1-2000
2001-4000
4001-6000
6001-8000
A
B
C
D
B
A
D
C
C
D
A
B
D
C
B
A
A
B
A
B
B
A
B
A
POWER UNIT VALUES
Value Unit
0
*1
2
3
4
5
6
7
8
Watt (W)
Kilowatt (kW)
Megawatt (MW)
Joules-per-hour (J/h)
Kilojoules-per-hour (kJ/h)
Gigajoules-per-hour (GJ/h)
Btu-per-hour (Btu/h)
Kilo-Btu-per-hour (kBtu/h)
ton
ENERGY UNIT VALUES
Value Unit
0
1
2
3
4
5
*6
7
8
Kilojoule (kJ)
Megajoule (MJ)
Gigajoule (GJ)
Btu
Kilo-Btu (kBtu)
Watt-hour (Wh)
Kilowatt-hour (kWh)
Megawatt-hour (MWh)
ton-hour
MASS FLOW UNIT VALUES
Value Unit
*0
1
2
3
4
5
6
7
Pounds-mass-per-second (lb/s)
Pounds-mass-per-minute (lb/min)
Pounds-mass-per-hour (lb/hr)
Pounds-mass-per-day (lbm/day)
Kilograms-per-second (kg/s)
Kilograms-per-minute (kg/min)
Kilograms-per-hour (kg/s)
Kilograms-per-day (kg/day)
PRESSURE UNIT VALUES
Value Unit
*0
1
Pounds-per-square-inch (psi)
Kilopascals (kPa)
VELOCITY PROBE LOCATION VALUES
Value Unit
*0
1
Inlet
Outlet
RTD LOCATION MAPPING
Value Unit
*0
1
RTD1 in Inlet, RTD2 in Outlet
RTD1 in Outlet, RTD2 in Inlet
TEMPERATURE UNIT VALUES
Value Unit
*0
1
2
3
Fahrenheit (°F)
Rankine (R)
Celsius (°C)
Kelvin (K)
Table 4
Table 5
Table 6
Table 7
Table 8
Table 10
Table 9