Vaisala HMW90 - Manual (Page 94)

User's Guide _______________________________________________________________________
92 ___________________________________________________________________ M211399EN-F
Protocol_Services
Who-Is, I-Am, Who-Has, I-Have and UnconfirmedCOVNotification
services are available only when HMW90 is MS/TP master. Reinitialize
Device service must be password protected. According to BACnet
protocol, password is character string having max 20 characters. Default
password is "1234". Password can be changed through the service port
by using the BACNET command. See section Set BACnet Parameters on
page 64.
Database_revision
This is changed during operation according to section 12.11.35 of
ANSI/ASHRAE standard 135-2008.
Relative Humidity object
This Analog Input Object exists only in the HMW95 model.
Table 20 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