Vaisala HMP3 - Modbus Communication Examples

Register
number
(decimal
)
Address
(hexade
cimal)
Register description Data format Note
514 0201
hex
Online status 16-bit boolean 0000
hex
: Output locked
0001
hex
: Online data available
516 0203
hex
Error code 32-bit signed
integer
See Table 60 (page 86).
0204
hex
518 0205
hex
Security hash 32-bit signed
integer
Security hash changes when
any change is made to device
settings or adjustments.
0206
hex
520 0207
hex
RH measurement
status
16-bit signed integer 0000
hex
: Status OK
0002
hex
: Reading is not reliable
0004
hex
: Under range
0008
hex
: Over range
0020
hex
: Value locked
0080
hex
: Sensor failure
0100
hex
: Measurement not
ready
521 0208
hex
T measurement
status
16-bit signed integer
522 0209
hex
Tdf measurement
status
16-bit signed integer
523 020A
hex
Device status 16-bit signed integer 0000
hex
: Status OK
0001
hex
: Critical error,
maintenance needed
0002
hex
: Error, device may
recover automatically
0004
hex
: Warning
0008
hex
: Notification
0010
hex
: Calibration mode
active
Table 60 Error codes in register 0203
hex
Bitmask Error message Severity
0000
hex
Status OK
0001
hex
Temperature measurement error Error
0002
hex
Humidity measurement error Error
0004
hex
Humidity sensor failure Error
HMP3, HMP4, HMP5, HMP7, HMP8, HMP9, MMP8, TMP1 User Guide M212022EN-D
86
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