Vaisala HMP4 - Status Registers; Table 78 Modbus Status Data Registers (Read-Only)

A.4.3 Status registers
Table 78 Modbus status data registers (read-only)
Register
number
Address Register description Data format Note
513 0200
hex
Error status 16-bit boolean 0000
hex
: One or more errors
active
0001
hex
: No errors
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 79 (page 108).
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
0001
hex
: Measurement is not
available
0002
hex
: Measurement is not
reliable
0004
hex
: Under range
0008
hex
: Over range
0020
hex
: Value locked
0080
hex
: Sensor failure
0100
hex
: Measurement is not
ready
521 0208
hex
T measurement
status
16-bit signed integer
522 0209
hex
T
d/f
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
Appendix A – Modbus reference
107