Hoffer Flow Controls HIT-4G, User Manual

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44 Modbus Communications
HP-328 HIT-4G
Register
(Decimal)
Description Data
Type
Access Notes
8025 Calibrate Temp
Low
U16 R/W Write 5000 to calibrate
Read for A/D counts
8026 Calibrate Temp
High
U16 R/W Write 5000 to calibrate
Read for A/D counts
8027 Calibrate Press
Low
U16 R/W Write 5000 to calibrate
Read for A/D counts
8028 Calibrate Press
High
U16 R/W Write 5000 to calibrate
Read for A/D counts
8029 Temperature
Units
U16 R/W 0 == Fahrenheit;
1 == Celsius
8030 Pressure Units U16 R/W 0 = PSIA, 1 = bar-a,
2 = PSIG, 3 = bar-g
8031 Density Units U16 R/W 0 = lb/ft3; 1 = kg/m3
8038-39
†
Request Flow
Temperature
(16-bit)
FP32 RO Flowing Temperature
in two consecutive
16-bit registers
8042-43
†
Request Flow
Pressure
(16-bit)
FP32 RO Flowing Pressure in
two consecutive 16-
bit registers
8046-47
†
Request Flow
Compressibility
(16-bit)
FP32 RO Flowing
Compressibility in
two consecutive 16-
bit registers
* The Total and Grand Total values are available in 3 formats:
64-bit in a single register, 64-bit in four consecutive 16-bit
registers and 32-bit in two consecutive 16-bit registers. The
64-bit format is recommended for greater precision, especially
with values greater than 7-digits.
†
Temperature, Pressure and Compressibility are available in 16-
bit registers in firmware versions 1.020421 and later.