Vaisala HUMICAP HMW92 - Relative Humidity Object; Table 19 Relative Humidity Object Properties; Table 20 Status Flags; Table 21 Reliability

Appendix A _________________________________________________________ BACnet Reference
VAISALA ________________________________________________________________________ 87
Relative Humidity Object
This Analog Input Object exists only in the HMW95 model.
Table 19 Relative Humidity Object Properties
Property
Data type
(Application Type)
Writable
(Conformance
Code)
Value or Initial Value
Persistence
Object_Identifier
BACnetObjectIdentifier
No (R)
00 00 00 02 (hex)
Object Type = 0,
Instance = 2
Nonvolatile
Object_Name
CharacterString
No (R)
"RH"
Nonvolatile
Object_Type
BACnetObjectType
(ENUMERATED)
No (R)
0 (Analog Input)
Fixed
Present_Value
Real
Yes
(When Oos) (R)
0.0
Volatile
Description
CharacterString
No (O)
"Relative Humidity"
Nonvolatile
Units
BACnetEngineeringUnits
(ENUMERATED)
No (R)
29 (percent-relative-
humidity)
Nonvolatile
Status_Flags
BACnet Status Flags (BIT
STRING)
Yes (when OoS)
(R)
0 (FAULT == FALSE)
Volatile
Reliability
BACnet Reliability
(ENUMERATED)
Yes (when OoS)
(O)
0 (NO FAULT
DETECTED)
Volatile
Event State
BACnetEventState
(ENUMERATED)
No (R)
0 (NORMAL)
Volatile
Out_of_Service
BOOLEAN
Yes (R)
0 (FALSE)
Volatile
COV_Increment
Real
Yes (O)
NaN (COV reporting
disabled)
Nonvolatile
Min_Pres_Value
Real
No (O)
0.0 (same as limit for
UNDER_RANGE)
Nonvolatile
Max_Pres_Value
Real
No (O)
100 (same as limit for
OVER_RANGE)
Nonvolatile
Table 20 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
Table 21 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
Table 22 Event State
State
Cause
0 NORMAL
Reliability equals 0 (NO FAULT DETECTED)
1 FAULT
Reliability not 0