Appendix A - Modbus Variable Map
Table
Table
Table 7
7
7 Units
Units
Units
Unit
Unit
Unit Type
Type
Type
Selectable
Selectable
Selectable Units
Units
Units
Units
Units
Units Register
Register
Register
Converting
Converting
Converting registers
registers
registers to
to
to
unit
unit
unit values
values
values
Register
Register
Register value
value
value for
for
for 1
1
1
unit
unit
unit
Pressure
Percent
n/a
Pressure = Register
1 = 1% Pressure
psi
403208 = 0
Pressure = Register
1 = 1 psi
Bar
403208 = 1
Pressure = Register/10
10 = 1.0 Bar
Pressure
MPa
403208 = 2
Pressure =
Register/100
100 = 1.00 Mpa
Speed
Cycles/min
n/a
Speed = Register/10
10 = 1.0 cycle/min
Liters/min
403210 = 0
Flow = Register/10
10 = 1.0 L/min
Gallons/min
403210 = 1
Flow = Register/10
10 = 1.0 Gal/min
cc/min
403210 = 2
Flow = Register
1 = 1 cc/min
oz/min
403210 = 3
Flow = Register
1 = 1 oz/min
Flow
Cycles/min
403210 = 4
Flow = Register/10
10 = 1.0 cycle/min
Liters
403209 = 0
Volume = 1000*High +
Low/10
0 (High) / 10 (Low) =
1.0 L
Volume
Gallons
403209 = 1
Volume = 1000*High +
Low/10
0 (High) / 10 (Low) =
1.0 Gal
Cycles
Pump Cycles
n/a
Cycles = 10000*High
+ Low
0 (High) / 1 (Low) = 1
cycle
Example of converting volume register reading to units: If the reading for register 404106 (volume high
word) is 12, and the reading for register 404107 (volume low word) is 34, the volume is 12003.4 liters. 12 *
1000 + 34/10 = 12003.4.
Example of converting cycles register reading to units: If the reading for register 404108 (cycles high
word) is 75, and the reading for register 404109 (cycles low word) is 8000, the volume is 758,000 cycles.
75 * 10000 + 8000 = 758000.
40
3A2527H
