Vaisala HMP Series - Configuration Registers; Table 77 Modbus Configuration Data Registers (Writable)

Register
number
Address Register description Data format Scale
factor
Oset Unit
278 0115
hex
Water concentration
(wet basis)
16-bit signed
integer
100 0 vol-%
279 0116
hex
Relative humidity
(dew/frost)
16-bit signed
integer
100 0 %RH
289 0120
hex
Water vapor mass
fraction
16-bit signed
integer
1 0 ppm
w
A.4.2 Configuration registers
Table 77 Modbus configuration data registers (writable)
Register
number
Address Register description Data format Unit/Valid range
General
1287 0506
hex
Condensation prevention on/
o. Enables the condensation
prevention heating functions
of the device.
When warming is active,
values of output parameters
that depend on temperature
measurement (for example,
relative humidity) are
unavailable unless
temperature is written to
register 0334
hex
from an
external source.
16-bit boolean 0 = o (default)
1 = on
2561 0A00
hex
User information Text Text string of 24 bytes
in UTF-8 encoding
Compensation setpoints
769 0300
hex
Pressure compensation
setpoint
32-bit float Unit: hPa
Default: 1013.25 hPa
0301
hex
HMP Series with MMP8 and TMP1 User Guide M212022EN-F
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