Vaisala HPP272, User Manual, Page: 51 / 66

Table 14 Modbus Configuration Data Registers (Writable)
Address
(Decimal) Address
(Hexadecimal) Register Description Data
Format Unit / Valid Range
769 0300
hex
Volatile value for
pressure compensation
(value cleared at probe
reset). Used for
compensating the
measurement for
pressure if pressure
compensation is turned
ON (register 0504
hex
).
32-bit float hPa
813.25 ... 1213.25
(default 1013.25 hPa)
(Init copied from power-
up value)
771 0302
hex
Volatile value for given
temperature reading
(value cleared at probe
reset). Used for
calculations instead of
the temperature from the
temperature probe if
temperature
compensation is turned
ON (register 0505
hex
).
32-bit float °C
-40 ... +80
(Init copied from power-
up value)
773 0304
hex
Power-up value for
pressure compensation 32-bit float hPa
813.25 ... 1213.25
(default 1013.25 hPa)
775 0306
hex
Power-up value for given
temperature reading 32-bit float °C
-40 ... +80
777 0308
hex
Purge interval 16-bit
integer min
60 ... 10080
(= 1 hour ... 1 week)
(default: 1440 (= 24
hours))
Appendix A – Modbus Reference
49