Vaisala HMW90 - Manual (Page 99)

Appendix A _________________________________________________________ BACnet Reference
VAISALA ________________________________________________________________________ 97
Status Flags
Table 30 Status Flags
Flag State Cause
IN_ALARM FALSE Event State equals 0 (NORMAL)
TRUE Event State not 0
FAULT FALSE Reliability equals 0 (NO FAULT
DETECTED)
TRUE Reliability not 0
OVERRIDDEN FALSE Always FALSE
OUT_OF_SERVICE FALSE Present Value may NOT be written
via BACnet
TRUE Present Value may be written via
BACnet
Reliability
Reliability of calculated humidity objects depends on reliability of RH
measurement.
Table 31 Reliability
State Cause
0 NO_FAULT_DETECTED
1 NO_SENSOR No contact to measurement module
2 OVER_RANGE RH over 100%
3 UNDER_RANGE RH under 0%
7 UNRELIABLE_OTHER Other measurement error
Event State
Table 32 Event State
State Cause
0 NORMAL Reliability equals 0 (NO FAULT
DETECTED)
1 FAULT Reliability not 0
Out of Service
Out of Service value is writeable. By Default = FALSE. Parameter is
volatile.